Permanent Downhole Gauge
Encyclopedia
A Permanent Downhole Gauge (PDG) is a pressure and/or temperature gauge
permanently installed in an oil
or gas well. Typically they are installed in tubing in the well and can measure the tubing pressure or annulus pressure or both. Systems installed in well casing to read formation pressure directly, suspended systems, and systems built in coil (continuous) tubing are also available. The data that PDGs provide are useful to Reservoir Engineers in determining the quantities of oil or gas contained below the Earth's surface in an oil or gas reservoir and also which method of production is best.
Permanent Downhole gauges or Permanents (for short), are installed in oil and gas wells for the purposes of observation and optimization. The most prolific function of a permanent is to monitor pressure at a single point or multiple points in a well. Temperature is the second most monitored factor. Permanent downhole gauges continue to evolve into many different types of sensors.
1. Pressure
2. Temperature
3. distributive temperature
4. noise
5. strain
6. flow
The information provided by a permanently mounted sensor enables Smart Well technology. A "Smart Well" is a well that can monitor information and make adjustments automatically. The adjustments will optimize production or protect the well. The vast majority of producing oil and gas wells in the world have no such instrumentation or capabilities. PDG's are important tools for optimal production and protection of our most important non-renewable resources.
Gauge (engineering)
In engineering, a gauge or gage, is used to make measurements. A wide variety of tools exist which serve such funtions, ranging from simple pieces of material against which sizes can be measured to complex pieces of machinery...
permanently installed in an oil
Oil well
An oil well is a general term for any boring through the earth's surface that is designed to find and acquire petroleum oil hydrocarbons. Usually some natural gas is produced along with the oil. A well that is designed to produce mainly or only gas may be termed a gas well.-History:The earliest...
or gas well. Typically they are installed in tubing in the well and can measure the tubing pressure or annulus pressure or both. Systems installed in well casing to read formation pressure directly, suspended systems, and systems built in coil (continuous) tubing are also available. The data that PDGs provide are useful to Reservoir Engineers in determining the quantities of oil or gas contained below the Earth's surface in an oil or gas reservoir and also which method of production is best.
Permanent Downhole gauges or Permanents (for short), are installed in oil and gas wells for the purposes of observation and optimization. The most prolific function of a permanent is to monitor pressure at a single point or multiple points in a well. Temperature is the second most monitored factor. Permanent downhole gauges continue to evolve into many different types of sensors.
1. Pressure
2. Temperature
3. distributive temperature
4. noise
5. strain
6. flow
The information provided by a permanently mounted sensor enables Smart Well technology. A "Smart Well" is a well that can monitor information and make adjustments automatically. The adjustments will optimize production or protect the well. The vast majority of producing oil and gas wells in the world have no such instrumentation or capabilities. PDG's are important tools for optimal production and protection of our most important non-renewable resources.
External links
- Active Completions - The history and evolution of downhole permanent reservoir monitoring systems