An integrated approach to reservoir engineering at Pleasant Bayou Geopressured-Geothermal reservoir
A numerical model has been developed for the Pleasant Bayou Geothermal-Geopressured reservoir. This reservoir description is the result of integration of a variety of data, including geological and geophysical interpretations, pressure transient test analyses, and well operations. Transient test analyses suggested several enhancements to the geologic description provided by University of Texas Bureau of Economic Geology (BEG), including the presence of an internal fault not previously identified. The transient tests also suggested water influx from an adjacent aquifer during the long-term testing of Pleasant Bayou; comparisons between transient test analyses and the reservoir description from BEG suggests that this fault exhibits pressure-dependent behavior. Below some pressure difference across the fault, it remains a no-flow barrier; above this threshold pressure drop the barrier fails, and fluid moves across the fault. A history match exercise is presented, using the hypothesized {open_quotes}leaky fault.{close_quotes} Successful match of 4 years of production rates and estimates of average reservoir pressure supports the reservoir description developed herein. Sensitivity studies indicate that the degree of communication between the perforated interval and the upper and lower sands in the reservoir (termed {open_quotes}distal volume{close_quotes} by BEG) impact simulation results very little, whereas results are quite sensitive to storage and transport properties of this distal volume. The prediction phase of the study indicates that Pleasant Bayou is capable of producing 20,000 STB/d through 1997, with the final bottomhole pressure approximately 1600 psi above abandonment pressure.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 10146151
- Report Number(s):
- EGG-EP--10557; ON: DE94010769
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pleasant Bayou Geopressured-Geothermal Reservoir Analysis - January 1991
Reservoir Modeling and Prediction at Pleasant Bayou Geopressured-Geothermal Reservoir
Microseismic monitoring of Chocolate Bayou Texas: the Pleasant Bayou No. 2 geopressured/geothermal energy test-well program. 1981 annual progress report
Technical Report
·
Mon Dec 31 23:00:00 EST 1990
·
OSTI ID:893428
Reservoir Modeling and Prediction at Pleasant Bayou Geopressured-Geothermal Reservoir
Conference
·
Mon Mar 23 23:00:00 EST 1992
·
OSTI ID:891967
Microseismic monitoring of Chocolate Bayou Texas: the Pleasant Bayou No. 2 geopressured/geothermal energy test-well program. 1981 annual progress report
Technical Report
·
Thu Dec 31 23:00:00 EST 1981
·
OSTI ID:6471568