How our revolutionary GEOTRU technology enables monitoring at extremely high temperatures and provides data quality rivaling the most accurate tools in the industry.
Downhole Monitoring Success
Temperature, vibration, and time in situ are typically the main factors determining digital downhole monitoring success. As reservoir temperature and completion vibration increase, so does the stress applied to electrical components. The longer these components experience stress, the more likely they are to fail.
Our GEOTRU gauge platform is an innovative downhole gauge solution that features no electronics downhole and delivers exceptional long-term performance.
No-Electonics Downhole
Traditional downhole gauges contain electronics that degrade at elevated temperatures or where high vibration environments exist.
Our line of GEOTRU gauges differ from traditional electronic downhole gauges because they are truly electronics-free. GEOTRU gauges undertake all signal acquisition and processing at the surface, which means there is no requirement for downhole gauge electronics.
Figure 1: GEOTRU No-Electronics vs. Traditional Digital Gauge cross-section
Not only does this result in vastly superior reliability, but it also makes for significantly easier troubleshooting as all electronics components are housed in the T6 Interface Card at surface and can be easily serviced without the need for a pull & re-run.
GEOTRU gauges are available in variants up to 300°C, where the downhole TEC drives the temperature limitation, not the downhole gauge itself.
GEOTRU vs. High-Temp Alternatives
Before GEOTRU was commercialized, Bubble Tube and Vibrating Wire Piezometer, alternative non-electronic free downhole monitoring solutions, were utilized in high-temperature completions. While these solutions provided monitoring options for operators, both exhibit some problematic features.
Bubble Tube
- Pressure only measurement, no temperature
- Low-frequency sampling, limited data points
- Additional and more complicated surface data acquisition equipment
- Ongoing costs related to gas consumables and service maintenance costs
Vibrating Wire
- Pressure only measurement, no temperature
- Pressure drift at elevated temperature as vibrating wire mechanically degrades
- Surface data acquisition susceptible to diurnal temperature changes
Problems Solved By GEOTRU
- Pressure and temperature is acquired in a single TEC downhole format
- Provides high frequency, high-quality data directly from the point of installation
- Small data acquisition footprint, not susceptible to diurnal temperature changes
- Set and forget installation with no requirement for ongoing consumable or maintenance costs
- The system is intrinsically safe certified by IECEx, Ex ia IIA T1-T4 Ga
- Exhibits stronger immunity to electrical noise than traditional electronic based solutions
GEOTRU Installation Experience
Since commercialization, the GEOTRU No-Electronics platform has been steadily adopted as the preferred solution for high-temperature applications, or where life of well data flow is critical to operator success.
Listed below are a selection of installation locations, describing both asset and completion types.
Install Location
Asset Type
Completion Type
Monitoring Solution
United States
(1 Well)
Propane Storage
Observation
GEOTRU 125
Canada
(5 Wells)
Heavy Oil (SAGD)
Observation
GEOTRU 260
Canada
(9 Wells)
Heavy Oil (SAGD)
ESP
GEOTRU 300
Canada
(1 Well)
Conventional
ESP
GEOTRU 125
Papua New Guinea
(1 Well)
Geothermal
Observation
GEOTRU 300
Asia
(5 Wells)
Conventional
Free Flow
GEOTRU 260
Asia
(1 Well)
Conventional
ESP
GEOTRU 260
Asia
(4 Wells)
Conventional
Gas Lift
GEOTRU 200
Asia
(1 Well)
Conventional
Drill Stem Test
GEOTRU 200
Asia
(1 Well)
Geothermal
Wellhead Suspended
GEOTRU 300
Middle East
(1 Well)
Geothermal
Wellhead Suspended
GEOTRU 300
GEOTRU Data Example
The following plot showcases data from a high-temperature SAGD completion in Canada. The GEOTRU 300 solution was installed in 2017 and has successfully captured data in well conditions that average 225°C, with a 236°C maximum bottom hole temperature.
Figure 2: GEOTRU No-Electronics data sample 2017-2021
GEOTRU vs. Quartz
On a recent offshore Drill Stem Test a GEOTRU 200 was installed between two GEOQ Quartz Gauges. The premise of the installation configuration was to assess the performance of the GEOTRU solution against the GEOQ Quartz solution. The installation configuration is shown below for reference.
Figure 3: GEOTRU vs. Quartz Drill Stem Test installation diagram
At the completion of the project Houston based Oilfield Data Solutions independently assessed the quality of the GEOTRU data with the aim to ascertain whether data from a GEOTRU system could be used to adequately replace Quartz data when conducting typical Reservoir Engineering workflows.
The results concluded that GEOTRU and GEOQ exhibited good pressure and temperature data quality. When conducting Pressure Transient Analysis (PTA), both data sets materially delivered the same result for Permeability and Skin.
Conclusion
GEOTRU is another high-quality solution in the GEO PSI downhole monitoring toolbox.
There is no debate whether our GEOTRU gauges are the ultimate solution for long-term high-temperature and high vibration completions. Building upon the already extremely high success rates, the GEOTRU No-Electronics design delivers more success in challenging completion environments.
If you would like to know more about groundbreaking innvations like our GEOTRU gauge platform we encourage you to contact us!
