Southeast Geysers injection and reservoir model study

Conference · Fri Jan 01 04:00:00 EST 1993

OSTI ID:7369639

Faulder, D D ^[1]

---

1. Idaho National Engineering Lab., Idaho Falls, ID (United States)

Water injection at the Geysers began in 1969 as a means of cooling-tower waste-water disposal. Simple disposal of water has gradually evolved into an accepted means of maintaining reservoir production. However, operator success with injection has varied widely. If injection is to be expanded at The Geysers, it is important to understand the processes of injection, vaporization and production of injectate and then to use this understanding to predict the behavior of the field during injection. Insight into these processes can be gained by studying historical injection at The Geysers and then using reservoir simulators to predict reservoir performance under various injection plans. A calibrated model of a portion of the Unit 13 area in the southeastern region of The Geysers steam field was used to evaluate historical injection efficiency of two injection wells and to then optimize reservoir performance through studying several injection scenarios. This study used historical production data to model reservoir performance using the TETRAD simulator. Naturally occurring isotopic data was utilized as a tracer of injected fluid and a measure of injection derived steam (IDS) in a manner as discussed by Beall et al.. This area of The Geysers was selected for study because injection spans thirteen years and includes two injection wells, exploitation started at essentially undisturbed conditions and reservoir performance is well documented in the literature.

• DOE Contract Number: AC07-76ID01570
• OSTI ID: 7369639
• Report Number(s): CONF-930484--; ON: DE94001714
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150904* -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
152004 -- Geothermal Data & Theory-- Isotope & Trace Element Studies
COMPUTER CODES
ENERGY
ENERGY SOURCES
ENGINEERING
EXPLOITATION
FLUID INJECTION
GEOTHERMAL ENERGY
GEOTHERMAL FIELDS
GEYSERS GEOTHERMAL FIELD
Geothermal Legacy
HYDROGEN COMPOUNDS
INJECTION WELLS
OXYGEN COMPOUNDS
RENEWABLE ENERGY SOURCES
RESERVOIR ENGINEERING
T CODES
WATER
WELLS