Nonisothermal effects during injection and falloff tests
The results show that to correctly analyze pressure transients governed by a moving thermal front, the values used for the fluid properties must correspond to the temperature of the injected fluid. On the other hand, for pressure falloff tests and for injection tests conducted in a well cooled by previous injection or drilling, the physical properties of the in situ reservoir fluids must be used. It is also shown that the application of conventional isothermal methods for calculating skin values from injection and falloff data will give erroneous results. A new method is presented for calculating skin values from injection and falloff data that accurately corrects for nonisothermal effects. A number of detailed examples are given that illustrate the suggested method of analysis. The technique is applied to the analysis of injection test data from a well located in the East Mesa geothermal field in southern California.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6817258
- Report Number(s):
- LBL-14270; CONF-820927-9; ON: DE84012250
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
150906* -- Geothermal Engineering-- Reservoir Stimulation & Extraction Technology
DRILLING
EAST MESA GEOTHERMAL FIELD
FLUID INJECTION
FLUIDS
GEOTHERMAL FIELDS
GEOTHERMAL FLUIDS
GEOTHERMAL WELLS
Geothermal Legacy
INJECTION WELLS
PERMEABILITY
PHYSICAL PROPERTIES
TESTING
WELL DRILLING
WELLS