Modeling studies of cold water injection into fluid-depleted, vapor-dominated geothermal reservoirs
The physical processes involved in cold water injection into a ''superheated'' fractured reservoir are not yet fully understood, and this insufficient knowledge of the fundamental mechanisms limits the possibility of forecasting future resevoir behavior and optimizing the heat extraction process. Numerical simulation can be a very effective tool in the study of the complex phenomena involved, allowing a rapid examination of different situations and conditions, a systematic investigation of the effects of various parameters on reservoir performance, and some insight into long term behavior. We have performed simulation experiments on simple one-dimensional, porous and fractured reservoir models in order to study the migration of injected water, thermodynamic conditions in the boiling zone, heat extraction, and vapor generation. A two-dimensional radial porous medium model, with some characteristics typical of the high productivity zones of Larderello, has also been applied for studying the evolution of the shape and the thermodynamic conditions of the injection plume in the presence of gravity, reservoir heterogeneities and anisotropy.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA); Istituto Internazionale per le Ricerche Geotermiche, Pisa (Italy)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5507073
- Report Number(s):
- LBL-21252; CONF-860111-11; ON: DE86012024
- Country of Publication:
- United States
- Language:
- English
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Injection plume behavior in fractured, vapor-dominated reservoirs
Injection plume behavior in fractured, vapor-dominated reservoirs
Related Subjects
BOILING
COMPUTERIZED SIMULATION
ENERGY SYSTEMS
FRACTURED RESERVOIRS
GEOTHERMAL SYSTEMS
Geothermal Legacy
HYDROTHERMAL SYSTEMS
MATERIALS
ONE-DIMENSIONAL CALCULATIONS
PHASE TRANSFORMATIONS
PLUMES
POROUS MATERIALS
REINJECTION
SIMULATION
THERMODYNAMICS
TWO-DIMENSIONAL CALCULATIONS
VAPOR-DOMINATED SYSTEMS