Baca geothermal demonstration project. Equation-of-state for water-carbon dioxide mixtures: implications for Baca reservoir
An equation-of-state package for water-carbon dioxide mixtures has been constructed from available thermodynamic data that covers the range of interest to the Baca reservoir system. The package has been used to examine the thermodynamic state of the Baca reservoir fluid for conditions of temperature, pressure and CO/sub 2/ content believed to bracket conditions existing at the production depth of the wells in the Redondo Creek area. It is shown that the reservoir fluid may be either all-liquid or two-phase at various well locations and depths, depending on the CO/sub 2/ content. It is also shown that the CO/sub 2/ content at reservoir conditions cannot be reliably inferred from pressure/temperature measurements made on flowing wells. The equation-of-state package has been incorporated into a general purpose geothermal reservoir simulator and a series of calculations made which show that the CO/sub 2/ content of the produced fluid may be less than or greater than that of the reservoir fluid. The characteristics of the produced fluid are sensitive to the CO/sub 2/ content in the reservoir.
- Research Organization:
- Systems, Science and Software, La Jolla, CA (USA)
- DOE Contract Number:
- FC03-78ET27163
- OSTI ID:
- 6481375
- Report Number(s):
- DOE/ET/27163-8; ON: DE81026881
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BACA GEOTHERMAL FIELD
GEOCHEMICAL SURVEYS
CARBON DIOXIDE
ABUNDANCE
GEOTHERMAL FLUIDS
CHEMICAL COMPOSITION
THERMODYNAMIC PROPERTIES
COMPUTERIZED SIMULATION
DRAWDOWN
EQUATIONS OF STATE
FLOW RATE
PRESSURE MEASUREMENT
RESERVOIR PRESSURE
RESERVOIR TEMPERATURE
TEMPERATURE MEASUREMENT
THERMAL CONDUCTIVITY
VISCOSITY
WATER
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
EQUATIONS
FLUIDS
GEOTHERMAL FIELDS
HYDROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SIMULATION
SURVEYS
Geothermal Legacy
150302* - Geothermal Exploration & Exploration Technology- Geochemical Techniques & Surveys
152001 - Geothermal Data & Theory- Properties of Aqueous Solutions