The oil

Oil field

An oil field is a region with an abundance of oil wells extracting petroleum from below ground. Because the oil reservoirs typically extend over a large area, possibly several hundred kilometres across, full exploitation entails multiple wells scattered across the area...

 and gas industry uses many acronyms and abbreviation

Abbreviation

An abbreviation is a shortened form of a word or phrase. Usually, but not always, it consists of a letter or group of letters taken from the word or phrase...

s. Obviously, this list is not anywhere near exhaustive or definitive.

It is an amalgam of user contributions. It is contextual and is meant for indicative purposes only. It should not be relied upon for anything but general information.

#

• 2D - Two dimensional (geophysics)
• 2P - Proved and Probable Reserves
• 3D - Three dimensional (geophysics)
• 3P - Proved, Probable and Possible Reserves
• 4D - Multiple Three dimensional's overlapping each other (geophysics)
• 7P - Prior Preparation and Precaution Prevents Piss Poor Performance, also Prior Proper Planning Prevents Piss Poor Performance

A

• AADE - American Association of Drilling Engineers
• AAODC - American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC
  IADC
  The abbreviation IADC may stand for:*Induced after-death communication*Inter-Agency Space Debris Coordination Committee*Inter-American Defense College*Inter-American Democratic Charter*International Advanced Database Conference...
  
  )
• AAV - Annulus Access Valve
• ABAN - Abandonment
• ACHE - Air Cooled Heat Exchanger
• ACOU - Acoustic
• ACQU - Acquisition Log
• ADROC - Advanced Rock Properties Report
• ADT - Applied Drilling Technology, ADT Log
• AFE - Authorization for Expenditure, a process of submitting a business proposal to investors
• AFP - Active Fire Protection
• AGRU - Acid Gas Removal Unit
• AHBDF - Along Hole Below Derrick
  Derrick
  A derrick is a lifting device composed of one tower, or guyed mast such as a pole which is hinged freely at the bottom. It is controlled by lines powered by some means such as man-hauling or motors, so that the pole can move in all four directions. A line runs up it and over its top with a hook on...
  
   Floor
• AIRG - Airgun
• AIRRE - Airgun Report
• AIT - Array Induction Tool
• AL - Appraisal Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), a type of onshore licence issued before 1996
• ALARP - As Low As Reasonably Practicable
• ALC - Vertical Seismic Profile Acoustic Log Calibration Report
• ALR - Acoustic Log Report
• aMDEA - activated Methyldiethanolamine
• AMS - Auxiliary Measurement Service Log
• AMV - Annulus Master Valve
• ANACO - Analysis of Core Logs Report
• ANARE - Analysis Report
• AOF - Absolute Open Flow
• AOFP - Absolute Open Flow Potential
• APD - Application for Permit to Drill
• API - American Petroleum Institute
  American Petroleum Institute
  The American Petroleum Institute, commonly referred to as API, is the largest U.S trade association for the oil and natural gas industry...
  
  : both the organisation and measure of oil weight (API gravity
  API gravity
  The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water. If its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks...
  
  ) in ºAPI
• APPRE - Appraisal Report
• APS - Active Pipe Support
• ARACL - Array Acoustic Log
• ARESV - Analysis of Reservoir
• ARI - Azimuthal Resistivity Image
• ARRC - Array Acoustic Report
• AS - Array Sonic Processing Log
• ASI - ASI Log
• ASME - American Society of Mechanical Engineers
  American Society of Mechanical Engineers
  The American Society of Mechanical Engineers is a professional body, specifically an engineering society, focused on mechanical engineering....
  
  
• ASP - Array Sonic Processing Report
• ASTM - American Society for Testing and Materials
• ASCSSV - Annulus Surface Controlled Sub-Surface Valve
• ASV - Annular Safety Valve
• AV - Annular Velocity or Apparent Viscosity
• AVO - Amplitude Versus Offset
  Amplitude Versus Offset
  In geophysics, amplitude versus offset or amplitude variation with offset is a variation in seismic reflection amplitude with change in distance between shotpoint and receiver. It is also referred as AVA...
  
   (geophysics)
• AWB/V - Annulus Wing Block/Valve (XT)
  Christmas tree (oil well)
  In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells...
  
  
• AWO - Approval for Well Operation

B

• B or b - prefix denoting a number in billions
• bbl - barrel
  Barrel (unit)
  A barrel is one of several units of volume, with dry barrels, fluid barrels , oil barrel, etc...
  
  
• BBSM - Behavioural Based Safety
  Behavior-based safety
  Behavior-based safety is the "application of science of behavior change to real world problems". BBS "focuses on what people do, analyzes why they do it, and then applies a research-supported intervention strategy to improve what people do"...
  
   Management
• Bcf - billion cubic feet (of natural gas
  Natural gas
  Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons . It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.Most natural...
  
  )
• Bcfe - billion cubic feet (of natural gas
  Natural gas
  Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons . It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.Most natural...
  
   equivalent)
• BDF - Below Derrick
  Derrick
  A derrick is a lifting device composed of one tower, or guyed mast such as a pole which is hinged freely at the bottom. It is controlled by lines powered by some means such as man-hauling or motors, so that the pole can move in all four directions. A line runs up it and over its top with a hook on...
  
   Floor
• BDL - Bit Data Log
• BGL - Borehole Geometry Log
• BGL - Below ground level (used as a datum for depths in a well)
• BGS - British Geological Survey
  British Geological Survey
  The British Geological Survey is a partly publicly funded body which aims to advance geoscientific knowledge of the United Kingdom landmass and its continental shelf by means of systematic surveying, monitoring and research. The BGS headquarters are in Keyworth, Nottinghamshire, but other centres...
  
  
• BGT - Borehole Geometry Tool
• BGWP - Base of Ground Water Protection
• BHA - Bottom Hole Assembly (toolstring on coiled tubing
  Coiled tubing
  In the oil and gas industries, coiled tubing refers to metal piping, normally 1" to 3.25" in diameter, used for interventions in oil and gas wells and sometimes as production tubing in depleted gas wells, which comes spooled on a large reel. Coiled tubing is often used to carry out operations...
  
   or drill pipe
  Drill string
  A drill string on a drilling rig is a column, or string, of drill pipe that transmits drilling fluid and torque to the drill bit. The term is loosely applied as the assembled collection of the drill pipe, drill collars, tools and drill bit...
  
  )
• BHC - BHC Gamma Ray Log
• BHCA - BHC Acoustic Log
• BHCS - BHC Sonic Log
• BHCT - Bottomhole Circulating Temperature
• BHL - Borehole Log
• BHP - Bottom Hole Pressure
• BHPRP - Borehole Pressure Report
• BHSRE - Bottom Hole Sampling Report
• BHSS - Borehole Seismic Survey
• BHT - Bottomhole Temperature
• BHTV - Borehole Television Report
• BINXQ - Bond Index Quicklook Log
• BIOR - Biostratigraphic Range Log
• BIORE - Biostratigraphy Study Report
• BIVDL - BI/DK/WF/Casing Collar Locator/Gamma Ray Log
• BLI - Bottom of Logging Interval
• BO - Back Off Log
• boe - barrel(s) of oil equivalent
• boed - barrel(s) of oil equivalent per day
• boepd - barrel(s) of oil equivalent per day
• BOM - Bill of Materials
• BOP - Blowout Preventer
  Blowout preventer
  A blowout preventer is a large, specialized valve used to seal, control and monitor oil and gas wells. Blowout preventers were developed to cope with extreme erratic pressures and uncontrolled flow emanating from a well reservoir during drilling. Kicks can lead to a potentially catastrophic...
  
  
• BOP - Bottom of Pipe
• bopd - barrel(s) of oil per day
• BOREH - Borehole Seismic Analysis
• BOTHL - Bottom Hole Locator Log
• BOTTO - Bottom Hole Pressure/Temperature Report
• bpd - barrels per day
• BPH - Barrels Per Hour
• BPFL - Borehole Profile Log
• BPLUG - Baker Plug
• BPV - Back Pressure Valve (goes on the end of coiled tubing a drill pipe tool strings to prevent fluid flow in the wrong direction)
• BQL - B/QL Log
• BRPLG - Bridge Plug Log
• BRT - Below Rotary Table (used as a datum for depths in a well)
• BSEE - US: Bureau of Safety and Environmental Enforcement (Formerly the MMS)
• BSR - Blind Shear Rams (Blowout Preventer
  Blowout preventer
  A blowout preventer is a large, specialized valve used to seal, control and monitor oil and gas wells. Blowout preventers were developed to cope with extreme erratic pressures and uncontrolled flow emanating from a well reservoir during drilling. Kicks can lead to a potentially catastrophic...
  
  )
• BS&W - Basic Sediments and Water
• BTHL - Bottom Hole Log
• BTU - British Thermal Units
• BUR - Build-Up Rate
• BVO - Ball Valve Operator
• bwd - barrels of water per day (often used in reference to oil production
  Water injection (oil production)
  Water injection refers to the method in oil industry where water is injected back into the reservoir, usually to increase pressure and thereby stimulate production. Water injection wells can be found both on- and offshore, to increase oil recovery from an existing reservoir...
  
  )
• bwpd - barrels of water per day

C

• C&E - Well completion and equipment cost
• C&S - Cased and Suspended
• C1 - Methane
  Methane
  Methane is a chemical compound with the chemical formula . It is the simplest alkane, the principal component of natural gas, and probably the most abundant organic compound on earth. The relative abundance of methane makes it an attractive fuel...
  
  
• C2 - Ethane
  Ethane
  Ethane is a chemical compound with chemical formula C2H6. It is the only two-carbon alkane that is an aliphatic hydrocarbon. At standard temperature and pressure, ethane is a colorless, odorless gas....
  
  
• C3 - Propane
  Propane
  Propane is a three-carbon alkane with the molecular formula , normally a gas, but compressible to a transportable liquid. A by-product of natural gas processing and petroleum refining, it is commonly used as a fuel for engines, oxy-gas torches, barbecues, portable stoves, and residential central...
  
  
• C4 - Butane
  Butane
  Butane is a gas with the formula C4H10 that is an alkane with four carbon atoms. The term may refer to any of two structural isomers, or to a mixture of them: in the IUPAC nomenclature, however, butane refers only to the unbranched n-butane isomer; the other one being called "methylpropane" or...
  
  
• C6 - Hexanes
• C7+ - Heavy Hydrocarbon
  Hydrocarbon
  In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons from which one hydrogen atom has been removed are functional groups, called hydrocarbyls....
  
   Components
• CA - Core Analysis Log
• CALIL - Caliper Log
• CALOG - Circumferential Acoustic Log
• CALVE - Calibrated Velocity Log Data
• CAPP - Canadian Association of Petroleum Producers
  Canadian Association of Petroleum Producers
  The Canadian Association of Petroleum Producers is the voice of the upstream Canadian oil and natural gas industry. The members of CAPP produce 90% of the petroleum production in Canada.-Background:...
  
  
• CART - Cam Actuated Running Tool (Housing Running Tool)
• CAS - Casing Log
• CB - Core Barrel
• CBIL - CBIL Log
• CBL - Cement Bond Log
  Cement bond log
  A cement bond log documents an evaluation of the integrity of cement work performed on an oil well. In the process of drilling and completing a well, cement is injected through the wellbore and rises up the annulus between the steel casing and the formation....
  
   (measurement of casing cement integrity)
• CBM - Choke Bridge Module - XT Choke
• CBM - Conventional Buoy Mooring
• CBM - Coal Bed Methane
• CCHT - Core Chart Log
• CCL - Casing Collar Locator (in perforation or completion operations, the tool provides depths by correlation of the casing string's magnetic anomaly with known casaing features)
• CCLP - Casing Collar Locator Perforation
• CCLTP - Casing Collar Locator Through Tubing Plug
• CD - Core Description
• CDATA - Core Data
• CDIS - CDI Synthetic Seismic Log
• CDU - Control Distribution Unit
• CDP - Common Depth Point (geophysics)
• CDP - Comprehensive Drilling Plan
• CDRCL - Compensated Dual Resistivity Cal. Log
• CE - CE Log
• CERE - Cement Remedial Log
• CECAN - CEC Analysis
• CEME - Cement Evaluation
• CET - Cement Evaluation Tool
• CFD - Computational Fluid Dynamics
• CGEL - CG EL Log
• CGL - Core Gamma Log
• CGPH - Core Graph Log
• CGR - Condensate gas ratio
• CGTL - Compact Gas to liquids
  Gas to liquids
  Gas to liquids is a refinery process to convert natural gas or other gaseous hydrocarbons into longer-chain hydrocarbons such as gasoline or diesel fuel...
  
   (production equipment small enough to fit on a ship)
• CHCNC - CHCNC Gamma Ray Casing Collar Locator
• CHDTP - Caliper HDT Playback Log
• CHECK - Checkshot and Acoustic Calibration Report
• CHESM - Contractor, Health, Environment and Safety Management
• CHKSR - Checkshot Survey Report
• CHKSS - Checkshot Survey Log
• CHP - Casing Hanger Pressure (pressure in an annulus
  Annulus (oil well)
  The annulus of an oil well refers to any void between any piping, tubing or casing and the piping, tubing, or casing immediately surrounding it. It is named after the corresponding geometric concept...
  
   as measured at the casing hanger
  Casing hanger
  The casing hanger is that portion of a wellhead assembly which provides support for the casing string when it is lowered into the wellbore. It serves to ensure that the casing is properly located. When the casing string has been run into the wellbore it is hung off, or suspended, by a casing...
  
  )
• CHROM - Chromatolog
• CHRT - Casing Hanger Running Tool
• CIBP - Cast Iron Bridge Plug
• CILD - Conduction Log
• CIMV - Chemical Injection Metering Valve
• CITHP - Closed In Tubing Head Pressure (tubing head pressure when the well is shut in)
• CIV - Chemical Injection Valve
• CL - Core Log
• CLG - Core Log and Graph
• CM - Choke Module
• CMP - Common Midpoint (geophysics)
• CMR - CMR Log
• CND - Compensated Neutron Density
• CNFDP - CNFD True Vertical Depth Playback Log
• CNGR - Compensated Neutron Gamma Ray Log
• CNL - Compensated Neutron Log
• CNLFD - CNL/FDC Log
• CNS - Central North Sea
  North Sea oil
  North Sea oil is a mixture of hydrocarbons, comprising liquid oil and natural gas, produced from oil reservoirs beneath the North Sea.In the oil industry, the term "North Sea" often includes areas such as the Norwegian Sea and the area known as "West of Shetland", "the Atlantic Frontier" or "the...
  
  
• CNCF - Field Normalized Compensated Neutron Porosity
• CO - Change Out (ex. from rod equipment to casing equipment)
• COL - Collar Log
• COMAN - Compositional Analysis
• COML - Compaction Log
• COMP - Composite Log
• COMPR - Completion Program Report
• COMPU - Computest Report
• COMRE - Completion Record Log
• CONDE - Condensate Analysis Report
• CONDR - Continuous Directional Log
• CORAN - Core Analysis Report
• CORE - Core Report
• CORG - Corgun Log
• CORIB - Coriband Log
• CORLG - Correlation Log
• COROR - Core Orientation Report
• COXY - Carbon
  Carbon
  Carbon is the chemical element with symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds...
  
  /Oxygen
  Oxygen
  Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...
  
   Log
• CPI separator - Corrugated plate interceptor
• CPI - CPI Log
• CPICB - CPI Coriband Log
• CPIRE - CPI Report
• CRA - Corrosion Resistant alloy
• CRET - Cement Retainer Setting Log
• CRT - Clamp Replacement Tool
• CsF - Caesium Formate (coincidentally also an acronym of the sole large-scale supplier of caesium formate brine, Cabot Specialty Fluids.)
• csg - casing
• CSHN - Cased Hole Neutron Log
• CSI - CSI Log
• CSMT - Core Sampler Tester Log
• CSPG - Canadian Society of Petroleum Geologists
  Canadian Society of Petroleum Geologists
  The Canadian Society of Petroleum Geologists is a professional geological society in Canada. The CSPG works to advance the science of geology, foster professional development of members and promote community awareness of the profession...
  
  
• CST - CST Log
• CSTAK - Core Sample Taken Log
• CSTRE - CST Report
• CSUG - Canadian Society for Unconventional Gas
• CT - Coiled Tubing
  Coiled tubing
  In the oil and gas industries, coiled tubing refers to metal piping, normally 1" to 3.25" in diameter, used for interventions in oil and gas wells and sometimes as production tubing in depleted gas wells, which comes spooled on a large reel. Coiled tubing is often used to carry out operations...
  
  
• CTD - Coiled Tubing Drilling
• CTCO - Coiled Tubing Clean Out
• CTOD - Crack Tip Opening Displacement
• CTRAC - Cement Tracer Log
• CUT - Cutter Log
• CUTTD - Cuttings Description Report
• CWOR- Completion Work Over Riser
• CYBD - Cyberbond Log
• CYBLK - Cyberlook Log
• CYDIP - Cyberdip Log
• CYDN - Cyberdon Log
• CYPRO - Cyberproducts Log

D

• D&C - Drilling and Completions
• DAC - Dipole Acoustic Log
• DARCI - Darci Log
• DAT - Wellhead Housing Drill-Ahead Tool
• DAZD - Dip and Azimuth Display
• DBB - Double Block & Bleed
• DC - Drill Centre
• DC - Drill Collar(s)
• DCALI - Dual Caliper Log
• DD - Directional Driller or Directional Drilling
  Directional drilling
  Directional drilling is the practice of drilling non-vertical wells. It can be broken down into three main groups: Oilfield Directional Drilling, Utility Installation Directional Drilling Directional drilling (or slant drilling) is the practice of drilling non-vertical wells. It can be broken down...
  
  
• DDBHC - DDBHC Waveform Log
• DDET - Depth Determination Log
• DDM - Derrick Drilling Machine (a.k.a. Top Drive)
• DDNL - Dual Det. Neutron Life Log
• DDPT - Drill Data Plot Log
• DECC - Department for Energy and Climate Change (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• DECT - Decay Time
• DEFSU - Definitive Survey Report
• DELTA - Delta-T Log
• DEN - Density
  Density
  The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is ρ . In some cases , density is also defined as its weight per unit volume; although, this quantity is more properly called specific weight...
  
   Log
• DEPAN - Deposit Analysis Report
• DEPC - Depth Control Log
• DESFL - Deep Induction SFL Log
• DEV - Development Well, Lahee classification
• DEVLG - Deviation Log
• DEXP - D-Exponent Log
• DF - Derrick
  Derrick
  A derrick is a lifting device composed of one tower, or guyed mast such as a pole which is hinged freely at the bottom. It is controlled by lines powered by some means such as man-hauling or motors, so that the pole can move in all four directions. A line runs up it and over its top with a hook on...
  
   Floor
• DFR - Drilling Factual Report
• DH - Drilling History
• DHC - Depositional History Curve
• DHSV - Downhole Safety Valve
  Downhole safety valve
  A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster...
  
  
• DHPTT - Downhole Pressure/Temperature Transducer
• DIBHC - DIS BHC Log
• DIEGR - Dielectric Gamma Ray Log
• DIL - Dual Induction Log
• DILB - Dual Induction BHC Log
• DILL - Dual Induction Laterolog
• DILLS - Dual Induction Log-LSS
• DILSL - Dual Induction Log-SLS
• DIM - Directional Inertia Mechanism
• DINT - Dip Interpretation
• DIP - Dipmeter Log
• DIPAR - Dipole Acoustic Report
• DIPBH - Dipmeter Borehole Log
• DIPFT - Dipmeter Fast Log
• DIPLP - Dip Lithology Pressure Log
• DIPRE - Dipmeter Report
• DIPRM - Dip Removal Log
• DIPSA - Dipmeter Soda Log
• DIPSK - Dipmeter Stick Log
• DIRS - Directional Survey Log
• DIRSU - Directional Survey Report
• DIS - DIS-SLS Log
• DISFL - DISFL DBHC Gamma Ray Log
• DISO - Dual Induction Sonic Log
• DL - Development Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), a type of onshore licence issued before 1996
• DLIST - Dip List Log
• DLL - Dual Laterolog
• DLS - Dog-Leg Severity (directional drilling)
• DMA - Dead Man Anchor
• DNHO - Downhole Logging
• DOA - Delegation of Authority
• DOE - Department of Energy
  United States Department of Energy
  The United States Department of Energy is a Cabinet-level department of the United States government concerned with the United States' policies regarding energy and safety in handling nuclear material...
  
  , United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  
• DOWRE - Downhole Report
• DP - Drill Pipe
  Drill pipe
  Drill pipe, is hollow, thick-walled, steel piping that is used on drilling rigs to facilitate the drilling of a wellbore and comes in a variety of sizes, strengths, and weights but are typically 30 to 33 feet in length...
  
  
• DPDV - Dynamically Positioned Drilling Vessel
• DPL - Dual Propagation Log
• DPLD - Differential Pressure Levitated Device (or Vehicle)
• DPRES - Dual Propagation Resistivity Log
• DPT - Deeper Pool Test, Lahee classification
• DQLC - Dipmeter Quality Control Log
• DR - Dummy Run Log
• DR - Drilling Report
• DRI - Drift Log
• DRLCT - Drilling Chart
• DRLOG - Drilling Log
• DRLPR - Drilling Proposal/Prog. Report
• DRPG - Drilling Program Report
• DRPRS - Drilling Pressure
• DRREP - Drilling Report
• DRYRE - Drying Report
• DS - Deviation Survey
• DSCAN - DSC Analysis Report
• DSI - Dipole Shear Imager
• DSPT - Cross Plots Log
• DST - Drill Stem Test
• DSTG - DSTG Log
• DSTL - Drill Stem Test Log
• DSTND - Dual Space Thermal Neutron Density Log
• DSTPB - Drill Stem Test True Vertical Depth Playback Log
• DSTR - Drill Stem Test Report
• DSTRE - Drill Stem Test Report
• DSTSM - Drill Stem Test Summary Report
• DSTW - Drill Stem Test Job Report/Works
• DSV - Diving Support Vessel
  Diving support vessel
  A diving support vessel is a ship that is used as a floating base for professional diving projects.Commercial Diving Support Vessels emerged during the 1960s and 1970s when the need arose for diving operations to be performed below and around oil production platforms and associated installations in...
  
   or Drilling Supervisor
• DTI - Department of Trade and Industry (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ) (obsolete; superseded by dBERR, which was then superseded by DECC)
• DTPB - CNT True Vertical Depth Playback Log
• DTT - Depth To Time
• DWOP - Drilling Well on Paper (a theoretical exercise conducted involving the Service provider managers)
• DWQL - Dual Water Quicklook Log
• DWSS - Dig Well Seismic Surface Log
• DXC - DXC Pressure Pilot Report

E

• E&A - Exploration and Appraisal
• E&P - Exploration and Production
• ECD - Equivalent Circulating Density
• ECP - External Casing Packer
• ECRD - Electrically Controlled Release Tool
• EDP - Exploration Drilling Program Report
• EDP - Emergency Disconnect Package
• EFR - Engineering Factual Report
• EGMBE - Ethylene Glycol Mono-Butyl Ether
• ELT - Economic Limit Test
• EL - Electric Log
• EM - EMOP Log
• EMOP - EMOP Well Site Processing Log
• EMP - Electromagnetic Propagation Log
• EMW - Equivalent Mud Weight
• EN PI - Enhanced Productivity Index Log
• ENG - Engineering Log
• ENGF - Engineer Factual Report
• ENGPD - Engineering Porosity Data
• ENJ - Enerjet Log
• EOFL - End of Field Life
• EOR - Enhanced Oil Recovery
• EOW - End Of Well Report
• EPCU - Electrical Power Conditioning Unit
• EPIDORIS - Exploration and Production Integrated Drilling Operations and Reservoir Information System
• EPL - EPL Log
• EPLG - Epilog
• EPLPC - EPL-PCD-SGR Log
• EPT - EPT Log
• EPTNG - EPT-NGT Log
• ER(D) - Extended Reach (Drilling)
• ESD - Emergency Shut-Down
• ESP - Electric Submersible Pump
• ETAP - Eastern Trough Area Project
  Eastern Trough Area Project
  The Eastern Trough Area Project, commonly known as ETAP, is a network of nine smaller oil and gas fields in the Central North Sea covering an area up to 35 km in diameter...
  
  
• ETTD - Electromagnetic Thickness Test
• ETU - Electrical Test Unit
• EUR - Estimated Ultimate Recovery
• EVARE - Evaluation Report
• EWR - End Of Well Report
• EXL - or XL, Exploration Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), a type of onshore licence issued between the First Onshore Licensing Round (1986) and the Sixth (1992)
• EZSV - EZSV Log

F

• FAC - Factual Report
• FACHV - Four Arm Caliper Log
• FANAL - Formation Analysis Sheet Log
• FAT - Factory Acceptance Testing
• FBE - Fusion Bonded Epoxy
• FC - Float Collar
• FCP - Final circulating pressure
• FCVE - F Curve Log
• FDC - Formation Density Log
• FDP - Field Development Plan
• FDS - Functional Design Specification
• FEED - Front End Engineering and Design
• FER - Field Equipment Room
• FEWD - Formation Evaluation While Drilling
• FFAC - Formation Factor Log
• FFM - Full Field Model
• FGEOL - Final Geological Report
• FH - Full Hole tool joint
• FI - Final Inspection
• FI - Free Issue
• FID - Final Investment Decision
• FIL - FIL Log
• FINST - Final Stratigraphic Report
• FINTP - Formation Interpretation
• FIT - Formation Integrity Test
• FIV - Formation Isolation Valve
• FL - F Log
• FLIV - FlowLine Injection Valve
• FLIV - Flowline Isolation Valve
• FLOG - FLOG PHIX RHGX Log
• FLOPR - Flow Profile Report
• FLOT - Flying Lead Orientation Tool
• FLOW - Flow & Buildup Test Report
• FLRA - Field Level Risk Assessment
• FLS - Fluid Sample
• flt - Fault (geology)
• FMECA - Failure Modes, Effects, and Criticality Analysis
• FMI - Formation Microimager Log
• FMP - Formation Microscan Report
• FMS - Formation Multiscan Log
• FMTAN - FMT Analysis Report
• FOSV - Full Opening Safety Valve
• FPIT - Free Point Indicator Tool
• FPL - Flow Analysis Log
• FPLAN - Field Plan Log
• FPSO - Floating Production Storage and Offloading vessel
  Floating Production Storage and Offloading
  A floating production, storage and offloading unit is a floating vessel used by the offshore industry for the processing of hydrocarbons and for storage of oil. A FPSO vessel is designed to receive hydrocarbons produced from nearby platforms or subsea template, process them, and store oil until it...
  
  
• FPU - Floating Processing Unit
• FRA - Fracture Log
• FRARE - Fracture Report
• FRES - Final Reserve Report
• FS - Fail Safe (as in FS valve)
• FSB - Flowline Support Base
• FSI - Flawless Start-up Initiative
• FSO - Floating Storage Offloading vessel
• FT - Formation Tester Log
• FTRE - Formation Testing Report
• FULDI - Full Diameter Study Report
• FV - Funnel Viscosity or Float Valve
• FWHP - Flowing Well Head Pressure
• FWKO - Free water knock out
• FWL - Free water level
• FWR - Final Well Report
• FWV - Flow Wing Valve (also known as Production Wing Valve on a Xmas tree
  Christmas tree (oil well)
  In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells...
  
  )

G

• G/C - Gas Condensate
• GAS - Gas Log
• GASAN - Gas Analysis Report
• GBS - Gravity Based Structure
• GBT - Gravity Base Tank
• GCLOG - Graphic Core Log
• GCT - GCT Log
• GDIP - Geodip Log
• GE - Condensate gas equivalent
• GEOCH - Geochemical Evaluation
• GEODY - GEO DYS Log
• GEOEV - Geochemical Evaluation Report
• GEOFO - Geological & Formation Evaluation Report
• GEOL - Geological Surveillance Log
• GEOP - Geophone Data Log
• GEOPN - Geological Well Prognosis Report
• GEOPR - Geological Operations Prog. Report
• GEORE - Geological Report
• GGRG - Gauge Ring
• GIIP - Gas Initially In Place
• GIS - Geographic Information System
  Geographic Information System
  A geographic information system, geographical information science, or geospatial information studies is a system designed to capture, store, manipulate, analyze, manage, and present all types of geographically referenced data...
  
  (s)
• GL - Gas Lift or Ground Level
• GLM - Gas Lift Mandrel (alternative name for Side Pocket Mandrel)
• GLR - Gas Liquid Ratio
• GLT - GLT Log
• GLV - Gas Lift Valve
• GOC - Gas Oil Contact
• GOM - Gulf of Mexico
  Gulf of Mexico
  The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...
  
  
• GOP - Geological Operations Report
• GOR - Gas Oil Ratio
  Gas oil ratio
  When oil is brought to surface conditions it is usual for some natural gas to come out of solution. The gas/oil ratio is the ratio of the volume of gas that comes out of solution, to the volume of oil at standard conditions....
  
  
• GOSP - Gas/Oil Separation Plant
• GPIT - Inclinometry Tool Log
• GPLT - Geol Plot Log
• GPSL - Geo Pressure Log
• GRAD - Gradiometer Log
• GRLOG - Grapholog
• GRN - Gamma Ray Neutron Log
• GRP - Glass Reinforced Plastic
• GRV - Gross Rock Volume
• GRSVY - Gradient Survey Log
• GST - GST Log
• GTL - Gas to liquids
  Gas to liquids
  Gas to liquids is a refinery process to convert natural gas or other gaseous hydrocarbons into longer-chain hydrocarbons such as gasoline or diesel fuel...
  
  
• GTW - Gas To Wire
• GUN - Gun Set Log
• GWC - Gas-Water Contact
• GWREP - Geo Well Report

H

• HAZID - Hazard Identification (meeting)
• HC - Hydrocarbons
• HCCS - Horizontal Clamp Connection System
• HCM - Horizontal Connection Module. To connect the Xmas Tree to the Manifold
• HDT - High Resolution Dipmeter Log
• HEXT - Hex Diplog
• HFE - Human Factors Engineering
• HGS - High (specific-)Gravity Solids
• HHP - Hydraulic Horsepower
• HIPPS - High Integrity Pressure Protection System
• HISC - Hydrogen induced stress cracking
• HL - Hook Load
• HLO - Heavy Load-out (Facility)
• HP - Hydrostatic Pressure
• HPGAG - High Pressure Gauge
• HPHT - High Pressure High Temperature (same as HTHP)
• HPPS - HP Pressure Log
• HPU - Hydraulic Power Unit
• HSE - Health, Safety and Environment or Health & Safety Executive (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• HTHP - High Temperature High Pressure (same as HPHT)
• HVDC - High Voltage Direct Current
• HWDP - Heavy-Weight Drill Pipe (sometimes spelled Hevi-Wate)
• HUD - Hold Up Depth
• HWDP - Heavy Weight Drill Pipe
• HYPJ - Hyperjet
• HYROP - Hydrophone Log

I

• I:P - Injector To Producer Ratio
• IADC - International Association of Drilling Contractors
• IBC - Intermediate Bulk Container
• ICoTA - Intervention and Coiled Tubing Association
• ICD - Inflow Control Device
• ICP - Intermediate Casing Point
• ICSU - Integrated Commissioning and Start Up
• ICV - Interval Control Valve
• ID - Inner or Internal Diameter (of a tubular component such as a casing
  Casing (oil well)
  Casing is large diameter pipe that is assembled and inserted into a recently drilled section of a borehole and typically held into place with cement.-Purpose:Casing that is cemented in place aids the drilling process in several ways:...
  
  )
• IDC - Intangible Drilling Costs
• IDEL - IDEL Log
• IEB - Induction Electro BHC Log
• IEL - Induction Electrical Log
• IF - Internal Flush tool joint
• IH - Gamma Ray Log
• IJL - Injection Log
• IL - Induction Log
• ILI - InLine Inspection (Intelligent Pigging
  Pigging
  Pigging in the context of pipelines refers to the practice of using pipeline inspection gauges or 'pigs' to perform various maintenance operations on a pipeline. This is done without stopping the flow of the product in the pipeline....
  
  )
• ILOGS - Image Logs
• IMAG - Image Analysis Report
• IMCA - International Marine Contractors Association
  International Marine Contractors Association
  The International Marine Contractors Association is the international trade association representing offshore, marine, and underwater engineering companies....
  
  
• INCR - Incline Report
• INCRE - Incline Report
• INDRS - IND RES Sonic Log
• INDT - INDT Log
• INDWE - Individual Well Record Report
• INJEC - Injection Falloff Log
• INSUR - Inrun Survey Report
• INVES - Investigative Program Report
• IOC - International Oil Company
• IPAA - Independent Petroleum Association of America
• IPC - Installed Production Capacity
• IPLS - IPLS Log
• IPR - Inflow Performance Relationship
• IR - Interpretation Report
• IRTJ - IRTJ Gamma Ray Slimhole Log
• ISF - ISF Sonic Log
• ISFBG - ISF BHC GR Log
• ISFCD - ISF Conductivity Log
• ISFGR - ISF GR Casing Collar Locator Log
• ISFL ISF-LSS Log
• ISFP - ISF Sonic True Vertical Depth Playback Log
• ISFPB - ISF True Vertical Depth Playback Log
• ISFSL - ISF SLS MSFL Log
• ITS - Influx To Surface
• IWCF - International Well Control Federation
• IWOCS- Installation / Workover Control System

J

• J&A - Junked and abandoned
• JB - Junk Basket
• JU - Jack-Up drilling rig
  Drilling rig
  A drilling rig is a machine which creates holes or shafts in the ground. Drilling rigs can be massive structures housing equipment used to drill water wells, oil wells, or natural gas extraction wells, or they can be small enough to be moved manually by one person...
  
  
• JT - Joule-Thomson
  Joule-Thomson effect
  In thermodynamics, the Joule–Thomson effect or Joule–Kelvin effect or Kelvin–Joule effect describes the temperature change of a gas or liquid when it is forced through a valve or porous plug while kept insulated so that no heat is exchanged with the environment. This procedure is called a...
  
   (effect/valve/separator)
• JVP - Joint Venture Partners/Participants

K

• KOP - Kick-Off Point (directional drilling)
• KOP - Kick Off Plug
• KRP - Kill rate pressure
• KB - Kelly
  Kelly drive
  A kelly drive refers to a type of well drilling device on an oil drilling rig that employs a section of pipe with a polygonal or splined outer surface, which passes through the matching polygonal or splined kelly bushing and rotary table...
  
   Bushing

L

• LACT - Lease Automatic Custody Transfer
• LAH - Lookahead
• LAOT - Linear Activation Over-ride Tool
• LARS - Launch & Recovery System
• LAT - Lowest Astronomical Tide
• LCM - Lost Circulation Material
• LCNLG - LDT CNL Gamma Ray Log
• LD - Lay down (tubing, rods, etc.)
• LDL - Litho Density Log
• LDTEP - LDT EPT Gamma Ray Log
• LEAKL - Leak Detection Log
• LEPRE - Litho-Elastic Property Report
• LGR - Liquid Gas Ratio
• LGS - Low (specific-)Gravity Solids
• LINCO - Liner and Completion Prog. Report
• LIOG - Lithography Log
• LITDE - Litho Density Quicklook Log
• LITHR - Lithological
  Lithology
  The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples or with low magnification microscopy, such as colour, texture, grain size, or composition. It may be either a detailed description of these characteristics or be a summary of...
  
   Description Report
• LITRE - Lithostratigraphy Report
• LITST - Lithostratigraphic Log
• LKO - Lowest Known Oil
• LL - Laterolog
• LMAP - Location Map
• LMRP - Lower Marine Riser Package
• LMV - Lower Master Valve (on a Xmas tree
  Christmas tree (oil well)
  In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells...
  
  )
• LNG - Liquified Natural Gas
• LOA - Letter of Authorisation/Agreement
• LOE - Lease Operating Expenses
• LOGGN - Logging Whilst Drilling
• LOGRS - Log Restoration Report
• LOGSM - Log Sample
• LOLER - Lifting Operations and Lifting Equipment Regulations
• LOT - Leak-Off Test
• LOT - Linear Override Tool
• LOT - Lock Open Tool
• LOTO - Lock Out / Tag Out
• LP - Low Pressure
• LPG - Liquified Petroleum Gas
  Liquified petroleum gas
  Liquefied petroleum gas is a flammable mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles. It is increasingly used as an aerosol propellant and a refrigerant, replacing chlorofluorocarbons in an effort to reduce damage to the ozone layer...
  
  
• LRP - Lower Riser Package
• LSBGR - Long Spacing BHC GR Log
• LSSON - Long Spacing Sonic Log
• LT - Linear Time
• LTI(FR) - Lost Time Incident (Frequency Rate)
• LUMI - Luminescence Log
• LVEL - Linear Velocity Log
• LWD - Logging While Drilling

M

• M or m - prefix designating a number in thousands (not to be confused with SI prefix M for mega- or m for milli
  Milli
  Milli is a prefix in the metric system denoting a factor of one thousandth . Adopted in 1795, the prefix comes from the Latin mille, meaning one thousand ....
  
  )
• MAASP - Maximum Acceptable [or Allowable] Annular Shut-in Pressure
• MAC - Multipole Acoustic Log
• MACL - Multiarm Caliper Log
• MAGST - Magnetostratigraphic Report
• MAOP - Maximum Allowable Operating Pressure
• MARA - Maralog
• MAWP - Maximum Allowable Working Pressure
• Mbd - thousand barrels per day
• Mbod - thousand barrels of oil per day
• Mboed - thousand barrels of oil equivalent per day
• Mcf - thousand cubic feet of natural gas
  Natural gas
  Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons . It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.Most natural...
  
  
• Mcfe - thousand cubic feet of natural gas
  Natural gas
  Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons . It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.Most natural...
  
   equivalent
• MCHE - Main Cryogenic Heat Exchanger
• MCM - Manifold Choke Module
• MCS - Manifold & Connection System
• MCS - Master Control Station
• mD - millidarcy, measure of permeability, with units of area
• MD - Measured Depth (see also MDSS)
• MD - Measurements/Drilling Log
• MDEA - Methyl Diethanolamine (aMDEA)
• MDL - Methane
  Methane
  Methane is a chemical compound with the chemical formula . It is the simplest alkane, the principal component of natural gas, and probably the most abundant organic compound on earth. The relative abundance of methane makes it an attractive fuel...
  
   Drainage Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), a type of onshore licence allowing natural gas to be collected "in the course of operations for making and keeping safe mines whether or not disused"
• MDSS - Measured Depth Sub-Sea
• MDT - Modular formation Dynamic Tester
• MEA - Monoethanolamine
• MEG - Mono-Ethylene Glycol
• MEPRL - Mechanical Properties Log
• MERCR - Mercury Injection Study Report
• MERG - Merge FDC/CNL/Gamma Ray/Dual Laterolog/Micro SFL Log
• MEST - MEST Log
• MF - Marsh Funnel (mud viscosity
  Viscosity
  Viscosity is a measure of the resistance of a fluid which is being deformed by either shear or tensile stress. In everyday terms , viscosity is "thickness" or "internal friction". Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity...
  
  )
• MFCT - Multifinger Caliper Tool
• MGL - Magnelog
• MLH - Mud Liner Hanger
• MIFR - Mini Frac Log
• MINL - Minilog
• MIPAL - Micropalaeo Log
• MIYP - maximum internal yield pressure
• mKB - Meters below Kelly Bushing
• ML - Microlog
• MLL - Microlaterolog
• MLF - Marine Loading Facility
• MM or mm - prefix designating a number in millions (not to be confused with SI unit mm for millimetre
  Millimetre
  The millimetre is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length....
  
  )
• MMbd - million barrels per day
• MMbod - million barrels of oil per day
• MMcf - million cubic feet (of natural gas)
• MMcfe - million cubic feet (of natural gas equivalent)
• MMS - Minerals Management Service
  Minerals Management Service
  The Bureau of Ocean Energy Management, Regulation and Enforcement , formerly known as the Minerals Management Service , was an agency of the United States Department of the Interior that managed the nation's natural gas, oil and other mineral resources on the outer continental shelf...
  
  , (United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  )
• mmscfd - million standard cubic feet per day
• MMTPA - Millions of Metric Tonnes per Annum
• mmstb - million stock barrels
• MNP - Merge and Playback Log
• MODU - Mobile Offshore Drilling Unit
• MOF - Marine Offloading Facility
• MOPU - Mobile Offshore Production Unit
• MOT - Materials/Marine Offloading Terminal
• MPA - Micropalaeo Analysis Report
• MPD - Managed Pressure Drilling
• MPFM - Multi-Phase Flow Meter
• MPK - Merged Playback Log
• MPQT - Manufacturing Procedure Qualification Test
• MPS - Manufacturing Procedure Specification
• MPV - Multi Purpose Vessel
• MQC - Multi Quick Connection Plate
• MR - Marine Riser
• MRCV - Multi Reverse Circulating Valve
• MRIRE - Magnetic Resonance Image Report
• MSCT - MSCT Gamma Ray Log
• MSFL - Micro SFL Log
• MSL - Mean sea level
• MSL - Micro Spherical Log
• MSS - Magnetic Single Shot
• MST - MST EXP Resistivity Log
• MTT - MTT Multi-Isotope Trace Tool
• MUD - Mud Log
• MUDT - Mud Temperatire Log
• MuSol - Mutual Solvent
• MVB - Master Valve Block (XT)
• MWD - Measurement While Drilling
  Measurement While Drilling
  MWD stands for Measurement While Drilling in the oil & gas industry. The simplest way to describe MWD is to relate it to the measurements a pilot takes. A pilot needs to know the direction they are flying , the angle they are fly at , and what type of skies they will be flying through...
  
  
• MWDRE - Measurement While Drilling
  Measurement While Drilling
  MWD stands for Measurement While Drilling in the oil & gas industry. The simplest way to describe MWD is to relate it to the measurements a pilot takes. A pilot needs to know the direction they are flying , the angle they are fly at , and what type of skies they will be flying through...
  
   Report
• MWS - Marine Warranty Survey
  Classification society
  A classification society is a non-governmental organization that establishes and maintains technical standards for the construction and operation of ships and offshore structures...
  
  

N

• NACE - National Association of Corrosion Engineers
• NAPF - Non Aqueous Phase Fluid
• NASA - Non Active Side Arm (term used in the North Sea
  North Sea oil
  North Sea oil is a mixture of hydrocarbons, comprising liquid oil and natural gas, produced from oil reservoirs beneath the North Sea.In the oil industry, the term "North Sea" often includes areas such as the Norwegian Sea and the area known as "West of Shetland", "the Atlantic Frontier" or "the...
  
   for kill wing valve on a Xmas tree
  Christmas tree (oil well)
  In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells...
  
  )
• NAVIG - Navigational Log
• NB - Nominal Bore
• NDE - Non Destructive Examination
• NEUT - Neutron Log
• NFG - 'No Fucking Good' used for marking damaged equipment, not to be confused with NG being natural gas
• NFI - No Further Investment
• NFW - New Field Wildcat, Lahee classification
• NGDC - National Geoscience Data Centre (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• NGL - Natural Gas Liquids
• NGR - Natural Gamma Ray
• NGRC - National Geological Records Centre (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• NGS - NGS Log
• NGSS - NGS Spectro Log
• NGT - NGT Log
• NGTLD - NGT LDT QL Log
• NGLQT - NGT QL Log
• NGTR - NGT Ratio Log
• NHDA - National Hydrocarbons Data Archive (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• NHPV - Net Hydrocarbon
  Hydrocarbon
  In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons from which one hydrogen atom has been removed are functional groups, called hydrocarbyls....
  
   Pore Volume
• NMHC - Non-Methane Hydrocarbons
• NMVOC - Non-Methane Volatile Organic Compounds
• NNS - Northern North Sea
  North Sea oil
  North Sea oil is a mixture of hydrocarbons, comprising liquid oil and natural gas, produced from oil reservoirs beneath the North Sea.In the oil industry, the term "North Sea" often includes areas such as the Norwegian Sea and the area known as "West of Shetland", "the Atlantic Frontier" or "the...
  
  
• NOISL - Noise Log
• NOC - National Oil Company
  National Oil Company
  A national oil company is an oil company fully or in the majority owned by a national government. According to the United States Energy Information Administration, NOCs accounted for 52% global oil production and controlled 88% of proven oil reserves in 2007.Due to their increasing dominance over...
  
  
• NORM - Naturally Occurring Radioactive Material
• NPD - Norwegian Petroleum Directorate
  Norwegian Petroleum Directorate
  The Norwegian Petroleum Directorate or OD is a Norwegian government agency responsible for the regulation of the petroleum resources on the Norwegian continental shelf. Based in Stavanger it is to ensure that the petroleum resources are allocated in an optimal at the same time as they incur...
  
  , Norway
  Norway
  Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...
  
  
• NPS - Nominal Pipe Size (sometimes NS)
• NPSH - Net Positive Suction Head
• NPV - Net Present Value
• NRV - Non Return Valve (Chicksan valve that only allows flow in one direction)
• NPW - New Pool Wildcat, Lahee classification
• NS -North Sea
  North Sea oil
  North Sea oil is a mixture of hydrocarbons, comprising liquid oil and natural gas, produced from oil reservoirs beneath the North Sea.In the oil industry, the term "North Sea" often includes areas such as the Norwegian Sea and the area known as "West of Shetland", "the Atlantic Frontier" or "the...
  
  
• NTHF - Non-Toxic High Flash
• NTU - Nephelometric Turbidity Unit
• NUMAR - Magnetic Resonance Image Log

O

• O&G - Oil and Gas (referring to the industry or the companies in it)
• OBCS- Ocean Bottom Cable System
• OBDTL - OBDT Log
• OBEVA - OBDT Evaluation Report
• OBM - Oil-Based Mud
• OCIMF - Oil Companies International Marine Forum
• OCL - Quality Control Log
• OCTG - Oil Country Tubular Goods (oil well casing, tubing, and drill pipe)
• OD - Outer Diameter (of a tubular component such as casing
  Casing (oil well)
  Casing is large diameter pipe that is assembled and inserted into a recently drilled section of a borehole and typically held into place with cement.-Purpose:Casing that is cemented in place aids the drilling process in several ways:...
  
  )
• ODT - Oil Down To
• OFST - Offset Vertical Seismic Profile
• OEM - Original Equipment Manufacturer
• OH - Openhole Log
• OHC - Open Hole Completion
• OIM - Offshore Installation Manager
  OIM (offshore installation manager)
  The Offshore Installation Manager is the most senior manager of an offshore platform operating on the UKCS.Many offshore operators have adopted this UK offshore management model and title and applied it to their operations in all global regions irrespective of the local regulations in force.In the...
  
  
• OMRL - OMRL Log
• ONAN - Oil Natural Air Natural cooled transformer
• OOE - Offshore Operation Engineer (senior technical authority on an offshore oil platform
  Oil platform
  An oil platform, also referred to as an offshore platform or, somewhat incorrectly, oil rig, is a lаrge structure with facilities to drill wells, to extract and process oil and natural gas, and to temporarily store product until it can be brought to shore for refining and marketing...
  
  )
• OOT - Out of Tolerance
• OPEC - Organization of Petroleum Exporting Countries
• OPL - Operations Log
• OPRES - Overpressure Log
• OPS - Operations Report
• ORICO - Oriented Core Data Report
• OTDR - Optical Time Domain Reflectometry
• OTIP - Operational Testing Implementation Plan
• OTL - Operations Team Leader
• OWC - Oil Water Contact
• OT - Off Tree
• OUT - Outpost, Lahee classification
• OVCH - Oversize Charts
• OVID - Offshore Vessel Inspection Database
• OWC - Oil-Water Contact

P

• P&A - plugged and abandoned (of a well)
• PEA - Palaeo Environment Study Report
• PADPRT - Pressure Assisted Drillpipe Running Tool
• PAL - Palaeo Chart
• PALYN - Palynological Analysis Report
• PAR - Pre-Assembled Rack
• PAGA - Public Address General Alarm
• PAU - Pre-Assembled Unit
• PBDMS - Playback DMSLS Log
• PBR - Polished Bore Receptacle (component of a completion string)
• PBTD - Plug Back Total Depth
• PBU - Pressure Build Up (applies to integrity testing on valves)
• PCB - Poly Chlorinated Biphenyl
• PCCL - Perforation Casing Collar Locator Log
• PCDM - Power and Control Distribution Module
• PCKR - Packer
• PCOLL - Perforation and Collar
• PDC - Perforation Depth Control
• PDC - Polycrystalline Diamond Composite (a type of drilling bit)
• PDG - Permanent Downhole Gauge
• PDKL - PDK Log
• PDKR - PDK 100 Report
• PDP - Proved Developed Reserves
• PDNP - Proved Developed Not Producing
• PE - Petroleum Engineer (but more universally, Professional Engineer)
• PEDL - Petroleum
  Petroleum
  Petroleum or crude oil is a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. Petroleum is recovered mostly through oil drilling...
  
   Exploration and Development Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), introduced in the 8th Onshore Licensing Round
• PENL - Penetration Log
• PEP - PEP Log
• PERDC - Perforation Depth Control
• PERFO - Perforation Log
• PERM - Permeability
• PERML - Permeability Log
• PESBG - Petroleum Exploration Society of Great Britain
• PETA - Petrographical Analysis Report
• PETD - Petrographic Data Log
• PETLG - Petrophysical Evaluation Log
• PETPM - Petrography
  Petrography
  Petrography is a branch of petrology that focuses on detailed descriptions of rocks. Someone who studies petrography is called a petrographer. The mineral content and the textural relationships within the rock are described in detail. Petrographic descriptions start with the field notes at the...
  
   Permeametry Report
• PETRP - Petrophysical Evaluation Report
• PFE - Plate/Frame Heat Exchanger
• PFHE - Plate Fin Heat Exchanger
• PLET - Pipeline End Termination
• PFC - PFC Log
• PFPG - Perforation Plug Log
• PFREC - Perforation Record Log
• PG - Pressure Gauge (Report)
• PGB - Permanent Guide Base
• PGOR - Produced Gas Oil Ratio
• PH - Phasor Log
• PHASE - Phasor Processing Log
• PHOL - Photon Log
• PHYFM - Physical Formation Log
• PI - Productivity Index or (Permit Issued)
• PINTL - Production Interpretation
• PIP - Pipe in Pipe
• PL - Production Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), a type of onshore licence issued before 1996
• PLEM - Pipeline End Manifold
• PLES -Pipeline End Structure
• PLG - Plug Log
• PLS - Position Location System
• PLT - Production Logging Tool
• PLTQ - Production Logging Tool Quicklook Log
• PLTRE - Production Logging Tool Report
• PMI - Positive Material Identification
• PMV -Production Master Valve
• POB - Personnel on Board
• POBM - Pseudo-Oil-Based Mud
• POF - Permanent Operations Facility
• POOH / POH - Pull Out Of Hole
• PON - Petroleum Operations Notice (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• POR - Density Porosity Log
• POSFR - Post Fracture Report
• POSTW - Post Well Appraisal Report
• POSWE - Post Well Summary Report
• PP - DXC Pressure Plot Log
• ppcf - Pounds Per Cubic Foot
• PPE - Preferred Pressure End
• ppg - Pounds Per Gallon
• PPI - Post Production Inspection/Intervention
• PPI - Post Pipelay Installation
• pptf - Pounds (per square inch) Per Thousand Feet (of depth) - a unit of fluid density/pressure peculiar to Shell
• PPS - Production Packer Setting
• PR2 - Testing regime to API6A Annex F
• PRA - Production Reporting & Allocation
• PREC - Perforation Record
• PRESS - Pressure Report
• PROD - Production Log
• PROTE - Production Test Report
• PROX - Proximity Log
• PRSRE - Pressure Gauge Report
• PSANA - Pressure Analysis
• PSA - Production Sharing Agreement
• PSC - Production Sharing Contract
• PSD - Planned Shut-Down
• PSIA - Pounds Per Square Inch Atmospheric
• PSIG - Pounds Per Square Inch Gauge
• PSL - Product Specification Level
• PSLOG - Pressure Log
• PSP - pseudostatic spontaneous potential
• PSPL - PSP Leak Detection Log
• PSQ - Plug Squeeze Log
• PST - PST Log
• PSV - Pipe Supply Vessel
• PSV - Pressure Safety Valve
• PSVAL - Pressure Evaluation Log
• PTS - Pipeline Termination Structure
• PTSET - Production Test Setter
• PTTC - Petroleum Technology Transfer Council, United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  
• PU - Pick Up (tbg, rods, power swivel, etc.)
• PUD - Proved Undeveloped Reserves
• PUN - Puncher Log
• PUR - Plant Upset Report
• PUWER - Provision and Use of Work Equipment Regulations
• PV - Plastic Viscosity
• PVT - Pressure Volume Temperature
• PVTRE - Pressure Volume Temperature Report
• PW - Produced Water
• PWB - Production Wing Block (XT)
• PWRI - Produced Water Re-Injection
• PWV - Production Wing Valve (also known as a flow wing valve on a Xmas tree
  Christmas tree (oil well)
  In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells...
  
  )

R

• RAC - Ratio Curves
• RACI - Responsible / Accountable / Consulted / Informed
• RAM - Reliability, Availability, and Maintainability
• RAWS - Raw Stacks VSP Log
• RBP - Retrievable Bridge Plug
• RKB - Rotary Kelly Bushings
• RCA - Root Cause Analysis
  Root cause analysis
  Root cause analysis is a class of problem solving methods aimed at identifying the root causes of problems or events.Root Cause Analysis is any structured approach to identifying the factors that resulted in the nature, the magnitude, the location, and the timing of the harmful outcomes of one...
  
  
• RCKST - Rig Checkshot
• RCD - Rotating Control Device
• RCL - Retainer Correlation Log
• RCM - Reliability Centred Maintenance
• RCR - Remote Component Replacement(Tool)
• RE - Reservoir Engineer
• REOR - Reorientation Log
• RE-PE - Re-Perforation Report
• RESAN - Reservoir Analysis
• RESEV - Reservoir Evaluation
• RESFL - Reservoir Fluid
• RESI - Resistivity Log
• RESL - Reservoir Log
• RESOI - Residual Oil
• REZ - Renewable Energy Zone (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• RF - Recovery Factor
• RFLNG - Ready for LNG
• RFMTS - Repeat Formation Tester
• RFSU - Ready For Start-Up
• RFT - Repeat Formation Tester
• RFTRE - Repeat Formation Tester Report
• RFTS - Repeat Formation Tester Sample
• RIGMO - Rig Move
• RIH - Run In Hole
• RITT - Riser Insertion Tube (Tool)
• RKB - Rotary Kelly Bushing (a datum for measuring depth in an oil well)
• RLOF - Rock Loadout Facility
• RMLC - Request for Mineral Land Clearance
• RMP - Reservoir Management Plan
• RMS - Ratcheting Mule Shoe
• RNT - RNT Log
• ROCT - Rotary Coring Tool
• ROP - Rate of Penetration
• ROV/WROV - Remotely Operated Vehicle/WorkClass Remotely Operated Vehicle, used for subsea
  Subsea
  Subsea is a general term frequently used to refer to equipment, technology, and methods employed in marine biology, undersea geology, offshore oil and gas developments, underwater mining, and offshore wind power industries.- Oil and gas :...
  
   construction and maintenance
• ROZ - Recoverable Oil Zone
• ROWS - Remote Operator Workstation
• RPCM - Ring Pair Corrosion Monitoring
  Corrosion Monitoring
  A corrosion monitoring program provides comprehensive monitoring of all critical components of industrial objects, assets, facilities and plants for signs of corrosion. For reliable operation it is important to identify the location, rate, and underlying causes of corrosion...
  
  
• RROCK - Routine Rock Properties Report
• RSS - Rig Site Survey
• RST - Reservoir Saturation Tool (Schlumberger) Log
• RTTS - Retrievable Test-Treat-Squeeze (packer)
• RWD - Reaming While Drilling

S

• SABA - Supplied Air Breathing Apparatus
• SAGD - Steam Assisted Gravity Drainage
• SALM - Single Anchor Loading Mooring
• SAM - Subsea Accumulator Module
• SAML - Sample Log
• SAMTK - Sample Taker Log
• SANDA - Sandstone Analysis Log
• SAT - SAT Log
• SAT - Site Acceptance Test
• SB - SIT-BO Log
• SBF - Synthetic Base Fluid
• SBM - Synthetic Base Mud
• SBT - Segmented Bond Tool
• SC - Seismic Calibration
• SCAL - Special core analysis
  Special core analysis
  In the petroleum industry, special core analysis, often abbreviated SCAL or SPCAN, is a laboratory procedure for conducting flow experiments on core plugs taken from a petroleum reservoir...
  
  
• SCAP - Scallops Log
• SCBA - Self Contained Breathing Apparatus
• SCDES - Sidewall Core Description
• scf - standard cubic feet (of natural gas
  Natural gas
  Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons . It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.Most natural...
  
  )
• SCHLL - Schlumberger
  Schlumberger
  Schlumberger Limited is the world's largest oilfield services company. Schlumberger employs over 110,000 people of more than 140 nationalities working in approximately 80 countries...
  
   Log also SCHLO, SCHLU
• SCM(MB) - Subsea Control Module (Mounting Base)
• SCO - Synthetic crude oil
• SCRS - Sidewall Cores
• SCSSV - Surface Controlled Subsurface Safety Valve
  Downhole safety valve
  A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster...
  
  
• SD - Sonic Density
• SDFD - Shut Down For Day
• SDFN - Shut Down For Night
• SDIC - Sonic Dual Induction
• SDL - Supplier Document List
• SDM/U - Subsea Distribution Module/Unit
• SDPBH - SDP Bottom Hole Pressure Report
• SDT - Step Draw-down Test (sometimes SDDT)
• SDU/M - Subsea Distribution Unit/Module
• SEA - Strategic Environmental Assessment (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  )
• SECGU - Section Gauge Log
• SEDHI - Sedimentary History
• SEDIM - Sedimentology
• SEDL - Sedimentology Log
• SEDRE - Sedimentology REport
• SEM - Subsea Electronics Module
• Semi (or Semi-Sub) - Semi-Submersible Drilling Rig
• SEPAR - Separator Sampling Report
• SEQSU - Sequential Survey
• SG - Static Gradient
• SGSI - Shell Global Solutions International
• SGUN - Squeeze Gun
• SHA - Sensor Harness Assembly
• SHDT - Stratigraphic High Resolution Dipmeter Tool
• SHO - Stab and Hinge Over
• SHOCK - Shcok Log
• SHOWL - Show Log
• SI/TA - Shut In/Temporarily Abandoned
• SICP - Shut-In Casing Pressure
• SIDPP - Shut-In Drill Pipe Pressure
• SIDSM - Sidewall Sample
• SIGTTO - Society of International Gas Tankers and Terminal Operators
• SIMCON - Simultaneous Construction
• SIMOPS - Simultaneous Operations
• SIP - Shut In Pressure
• SIPES - Society of Independent Professional Earth Scientists, United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  
• SIT - System Integration Test FR SIT - Field Representation SIT
• SITHP - Shut In Tubing Hanger/Head Pressure (another term for CITHP)
• SITT - Single TT Log
• SIWHP - Shut-in Well Head Pressure
• SKPLT - Stick Plot Log
• SL - Seismic Lines
• SLS - SLS GR Log
• SLT - SLT GR Log
• SMLS - Seamless Pipe
• SN - Seat Nipple
• SNP - Sidewall Neutron Porosity
• SNS - Southern North Sea
  North Sea oil
  North Sea oil is a mixture of hydrocarbons, comprising liquid oil and natural gas, produced from oil reservoirs beneath the North Sea.In the oil industry, the term "North Sea" often includes areas such as the Norwegian Sea and the area known as "West of Shetland", "the Atlantic Frontier" or "the...
  
  
• SOBM - Synthetic Oil Based Mud
• SOLAS - Safety of Life at Sea
• SONCB - Sonic Calibration Log
• SONRE - Sonic Calibration Report
• SONWR - Sonic Waveform Report
• SONWV - Sonic Waveform Log
• SP - Shot point (geophysics)
• SP - Spontaneous Potential (Well Log)
• SPCAN - Special core analysis
  Special core analysis
  In the petroleum industry, special core analysis, often abbreviated SCAL or SPCAN, is a laboratory procedure for conducting flow experiments on core plugs taken from a petroleum reservoir...
  
  
• SPE - Society of Petroleum Engineers
  Society of Petroleum Engineers
  The Society of Petroleum Engineers is a not-for-profit professional organization whose mission is to collect, disseminate, and exchange technical knowledge concerning the exploration, development and production of oil and gas resources and related technologies for the public benefit and to provide...
  
  
• SPEAN - Spectral Analysis
• SPEL - Spectralog
• SPFM - Single Phase Flow Meter
• SPH - SPH Log
• SPM - Side Pocket Mandrel or Strokes Per Minute (of a positive-displacement pump)
• SPOP - Spontaneous Potential Log
• SPP - Stand Pipe Pressure
• SPROF - Seismic Profile
• SPS - Subsea Production Systems
• SPT - Shallower Pool Test, Lahee classification
• SQL - Siesmic Quicklook Log
• SREC - Seismic Record Log
• SRT - Site Receival Test
• SS - Subsea, as in a datum of depth, e.g. TVDSS (true vertical depth subsea)
• SSCP -Subsea Cryogenic Pipeline
• SSCS - Subsea Control System
• SSG - Sidewall Sample Gun
• SSIV - Subsea Isolation Valve
• SSM - Subsea Manifolds
• SSMAR - Synthetic Seismic Marine Log
• SSPLR - Subsea Pig Launcher/Receiver
• SSSL - Supplementary Seismic Survey Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), a type of onshore licence
• SSSV - Sub-Surface Safety Valve
  Downhole safety valve
  A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster...
  
  
• SSTT - Subsea Test Tree
• SSU - Subsea Umbilicals
• SSV - Surface Safety Valve
• SSWI - Subsea Well Intervention
• stab - Stabiliser
• STAGR - Static Gradient Survey Report
• stb - stock tank barrel
• STC - STC Log
• STFL - Steel Tube Fly Lead
• STGL - Stratigraphic Log
• STIMU - Stimulation Report
• STKPT - Stuck Point
• STL - STL Gamma Ray Log
• STRAT - Stratigraphy
  Stratigraphy
  Stratigraphy, a branch of geology, studies rock layers and layering . It is primarily used in the study of sedimentary and layered volcanic rocks....
  
  , stratigraphic
• STRRE - Stratigraphy
  Stratigraphy
  Stratigraphy, a branch of geology, studies rock layers and layering . It is primarily used in the study of sedimentary and layered volcanic rocks....
  
   Report
• STOIIP - Stock Tank Oil Initially In Place
• STOP - Safety Training Observation Program
• STSH - String Shot
• SUML - Summarised Log
• SUMRE - Summary Report
• SUMST - Geological Summary Sheet
• SURF - Subsea/Umbilicals/Risers/Flowlines
• SURFR - Surface Sampling Report
• SURRE - Survey Report
• SURVL - Survey Chart Log
• SUT(A/B) - Subsea Umbilical Termination (Assembly/Box)
• SW - Salt Water
• SWD - Salt Water Disposal Well
• SWE - Senior Well Engineer
• SWHE - Spiral Wound Heat Exchanger
• SWOT - Strengths, Weaknesses, Opportunities and Threats
• SV - Sleeve Valve or Standing Valve
• SYNRE - Synthetic Seismic Report
• SYSEI - Synthetic Seismogram Log

T

• TA - Temporarily Abandoned
• TAGOGR - Thermally Assisted Gas/Oil Gravity Drainage
• TAPLI - Tape Listing
• TAPVE - Tape Verification
• TAR - True Amplitude Recovery
• TB - Tubing Puncher Log
• TBT - Through Bore Tree
• TCA - Total Corrosion Allowance
• TCI - Tunsgten Carbide Insert (a type of rollercone drillbit)
• TCF - Temporary Construction Facilities
• TCF - Trillion Cubic Feet(of gas)
• TCPD - Tubing-Conveyed Perforating Depth
• TCU- Thermal Combustion Unit
• TD - Target Depth
• TD - Total Depth (depth of the end of the well; also a verb, to reach the final depth, used as an acronym in this case)
• TDD - Total Depth (Logger)
• TDL - Total Depth (Driller)
• TDS - Top Drive System
• TDS - Total Dissolved Solids
• TDT - TDT Log
• TDTCP - TDT CPI Log
• TDT GR - TDT Gamma Ray Casing Collar Locator Log
• TEFC - Totally Enclosed Fan Cooled
• TEG - Tri-ethylene Glycol
• TELER - Teledrift Report
• TEMP- Temperature Log
• TFL - Through Flow Line
• TGB - Temporary Guide Base
• TGOR - Total Gas Oil Ratio (GOR uncorrected for gas lift
  Gas lift
  Gas lift is one of a number of processes used to artificially lift oil or water from wells where there is insufficient reservoir pressure to produce the well. The process involves injecting gas through the tubing-casing annulus. Injected gas aerates the fluid to reduce its density; the formation...
  
   gas present in the production fluid
  Production fluid
  Production fluid is the fluid mixture of oil, gas and water in formation fluid that flows to the surface of an oil well from a reservoir. Its consistency and composition varies.Fluids may be described by a multitude of characteristics including:...
  
  )
• TH - Tubing Hanger
  Tubing hanger
  A tubing hanger is a component used in the completion of oil and gas production wells. It is set in the tree or the wellhead and suspends the production tubing and/or casing. Sometimes it provides porting to allow the communication of hydraulic, electric and other downhole functions, as well as...
  
  
• THERM - Thermometer Log
• THP - Tubing Hanger Pressure (pressure in the production tubing
  Production tubing
  Production tubing is a tube used in a wellbore through which production fluids are produced .Production tubing is run into the drilled well after the casing is run and cemented in place. Production tubing protects wellbore casing from wear, tear, corrosion, and deposition of by-products, such as...
  
   as measured at the tubing hanger
  Tubing hanger
  A tubing hanger is a component used in the completion of oil and gas production wells. It is set in the tree or the wellhead and suspends the production tubing and/or casing. Sometimes it provides porting to allow the communication of hydraulic, electric and other downhole functions, as well as...
  
  )
• THRT - Tubing Hanger Running Tool
• TIE - Tie In Log
• TIH - Trip Into Hole
• TIW - Texas Iron Works (pressure valve)
• TIEBK - Tieback Report
• TLI - Top of Logging Interval
• TLOG - Technical Log
• TMCM - Tranverse Mercator Central Meridian
• TMD - Total Measured Depth in a wellbore
• TNDT - Thermal Neutron Decay Time
• TNDTG - Thermal Neutron Decay Time/Gamma Ray Log
• TOC - Top Of Cement
• TOC - Total Organic Content/Carbon
• TOH - Trip Out of Hole
• TOOH - Trip Out Of Hole
• TOL - Top Of Liner
• TORAN - Torque and Drag Analysis
• TPERF - Tool Performance
• TQM - Total Quality Management
• TRCFR - Total Recordable Case Frequency Rate
• TSA - Thermally Sprayed Aluminium
• TSI - Temporarily Shut In
• TR - Temporary Refuge
• TRA - Tracer Log
• TRACL - Tractor Log
• TRD - Total Report Data
• TREAT - Treatment Report
• TREP - Test Report
• TRIP - Trip Condition Log
• TRSV - Tubing Retrievable Safety Valve
  Downhole safety valve
  A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster...
  
  
• TRSCSSV - Tubing Retrievable Surface Controlled Sub-Surface Valve
  Downhole safety valve
  A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster...
  
  
• TRSCSSSV - Tubing Retrievable Surface Controlled Sub-Surface Safety Valve
  Downhole safety valve
  A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster...
  
  
• TT - Transit Time Log
• TTRD - Through Tubing Rotary Drilling
• TV/BIP - Ratio of Total Volume (ore and overburden) to Bitumen In Place
• TVBDF - True Vertical Depth Below Derrick Floor
• TVD - True Vertical Depth
• TVDPB - True Vertical Depth Playback Log
• TVDSS - True Vertical Depth Sub Sea
• TVELD - Time and Velocity to Depth
• TVRF - True Vertical Depth versus Repeat Formation Tester
• TWT - Two-Way Time (seismic)
• TWTTL - Two-Way Travel Time Log

U

• UBI - Ultrasonic Borehole Imager
• UBIRE - Ultrasonic Borehole Imager Report
• UCSU - Upstream Commissioning and Start-Up
• UFJ - Upper Flex Joint
• UGF - Universal Guide Frame
• UIC - Underground Injection Control
• UKCS - United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
   Continental Shelf
  Continental shelf
  The continental shelf is the extended perimeter of each continent and associated coastal plain. Much of the shelf was exposed during glacial periods, but is now submerged under relatively shallow seas and gulfs, and was similarly submerged during other interglacial periods. The continental margin,...
  
  
• UKOOA - United Kingdom Offshore Operators Association
• UKOOG - United Kingdom Onshore Operators Group
• ULCGR - Uncompressed LDC CNL Gamma Ray Log
• UMCA - Umbilical Midline Connection Assembly
• UMV - Upper Master Valve (from a Xmas tree
  Christmas tree (oil well)
  In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells...
  
  )
• UPR - Upper Pipe Ram
• URT - Universal Running Tool
• USGS - United States Geological Survey
  United States Geological Survey
  The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,...
  
  
• UTA - Umbilical Termination Assembly
• UTM - Universal Transverse Mercator

V

• VDENL - Variation Density Log
• VDL - VDL Log
• VDU - Vacuum Distillation Unit, used in processing bitumen
• VELL - Velocity Log
• VERAN - Verticality Analysis
• VERIF - Verification List
• VERLI - Verification Listing
• VERTK - Vertical Thickness
• VIR - Value Investment Ratio
• VISME - Viscosity Measurement
• VIV - Vortex induced Vibration
• VLP - Vertical Lift Performance
• VLTCS - Very Low Temperature Carbon Steel
• VO - Variation Order
• VOCs - Volatile Organic Compounds
• VOR - Variation Order Request
• VRR - Voidage Replacement Ratio
• VSP - Vertical Seismic Profile
• VSPRO - Vertical Seismic Profile
• VTDLL - Vertical Thickness Dual Laterolog
• VTFDC - Vertical Thickness FDC CNL Log
• VTISF - Vertical Thickness ISF Log
• VWL - Velocity Well Log
• VXT - Vertical Christmas Tree

W

• WABAN - Well Abandonment Report
• WAG - Water Alternating Gas (describes an injection well which alternates between water and gas injection)
• WALKS - Walkaway Seismic Profile
• WATAN - Water Analysis
• WAVF - Waveform Log
• WBM - Water-Based Mud
• WC - Watercut
• WE - Well Engineer
• WEG - Wireline Entry Guide
• WELDA - Well Data Report
• WELP - Well Log Plot
• WEQL - Well Equipment Layout
• WESTR - Well Status Record
• WESUR - Well Summary Report
• WFAC - Waveform Acoustic Log
• WGEO - Well Geophone Report
• WGFM - Wet Gas Flow Meter
• WGUNT - Water Gun Test
• WH - Well History
• WHIG - Whitehouse Gauge
• WHP - Wellhead Pressure
• WI - Water Injection
• WI - Working Interest
• WIPSP - WIP Stock Packer
• WLC - Wireline Composite Log
• WLL - Wireline Logging
• WLSUM - Well Summary
• WHM - Wellhead Maintenance
• WHP - Wellhead Pressure
• WOB - Weight On Bit
• WOC - Wait on Cement
• WOE - Well Operations Engineer (a key person of Well services
  Well services
  Well services is a department within a petroleum production company through which matters concerning existing wells are handled. Having a shared well services department for all assets operated by a company is seen as advantageous as it allows the pooling of talent, experience and resources for...
  
  )
• WOM - Wait on Material
• WORKO - Workover
• WOS - West of Shetland, oil province on the UKCS
• WOW - Wait On Weather
• WP - Well Proposal or Working Pressure
• WPLAN - Well Course Plan
• WPQ/S - Weld Procedure Qualification/Specification
• WPR - Well Prognosis Report
• WR - Wireline Retievable (as in a WR Plug)
• WRS - Well Report Sepia
• WRSCSSV - Wireline Retrievable Surface Controlled Sub-Surface Valve
  Downhole safety valve
  A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster...
  
  
• WSCL - Well Site Core Log
• WSE - Well Seismic Edit
• WSERE - Well Seismic Edit Report
• WSHT - Well Shoot
• WSL - Well Site Log
• WSO - Water Shut Off
• WSP - Well Seismic Profile
• WSR - Well Shoot Report
• WSS - Well Services Supervisor (leader of Well services
  Well services
  Well services is a department within a petroleum production company through which matters concerning existing wells are handled. Having a shared well services department for all assets operated by a company is seen as advantageous as it allows the pooling of talent, experience and resources for...
  
   at the wellsite)
• WSSAM - Well Site Sample
• WSSOF - WSS Offset Profile
• WSSUR - Well Seismic Survey Plot
• WSSVP - WSS VSP Raw Shots
• WSSVS - WSS VSP Stacks
• WSTL - Well Site Test Log
• WSU - Well Service Unit
• WT - Well Test
• WTI - West Texas Intermediate
  West Texas Intermediate
  West Texas Intermediate , also known as Texas light sweet, is a grade of crude oil used as a benchmark in oil pricing. It is a light and sweet crude oil...
  
   benchmark crude
• WUT - Water Up To
• WVS - Well Velocity Survey

X

• XL - or EXL, Exploration Licence (United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  ), a type of onshore licence issued between the First Onshore Licensing Round (1986) and the Sixth (1992)
• XLPE -Cross-linked Polyethylene
• XMT/XT/HXT - XMas Tree
  Christmas tree (oil well)
  In petroleum and natural gas extraction, a Christmas tree, or "tree", is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells...
  
  (Christmas Tree, the valve assembly on a production well-head)
• XO - Cross-Over
• XOM - Exxon Mobil
• XOV - Cross-Over Valve

External links

• Network International Glossary July-11
• Oil Field Acronyms and Abbreviations July-11
• Oil Gas Technical Terms Glossary July-11
• Schlumberger Oilfield Glossary July-11
• Oil Drum Acronyms July-11
• Drillingahead Oilfield Acronyms & Terminology Sept-11
• OCIMF Acronyms Oct-11
• SPWLA Petrophysical Curve Names and Mnemonics Oct-11
• American Royalty Council Glossary Nov-11