Evaluation of reservoir properties in a portion of the Salton Sea Geothermal Field [electronic resource].
- Livermore, Calif. : Lawrence Livermore Laboratory, 1979.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 56 : digital, PDF file
- Additional Creators:
- Lawrence Livermore Laboratory
United States. Department of Energy. Office of Scientific and Technical Information
- A series of pressure-transient tests was performed using several geothermal wells in the southwestern portion of the Salton Sea Geothermal Field in the Imperial Valley, California. The objective of the tests was to evaluate the permeability and storage capacity of the geothermal reservoir. Measurement of pressure transients in the corrosive, high-temperature environment of geothermal wells was made possible by modifying commercially available instrumentation and fabrication of pressure-sensing devices from very corrosion-resistant material. Analysis of pressure-transient data associated with production from and injection into the geothermal reservoir provides estimates of reservoir permeability that vary from 70 to 1000 md, with most of the values in the range from 70 to 220 md. A reservoir porosity-compressibility product of 2.8 x 10⁻⁶ psi⁻¹ was derived. The pressure responses to the tests appear to be characteristic of a confined, nonleaky reservoir. The vertical permeability of a 40-ft-thick shale layer within the reservoir was estimated to be between 0.1 and 1 md. No lateral positive or negative hydraulic boundaries were detected. The pressure response of the primary spent-brine injection well was indicative of combined fracture and matrix flow in the reservoir. This well's lifetime with no brine treatment prior to injection would be about 150 days at an injection flow rate of 600 gpm; simply cycling the brine through settling tanks prior to injection would increase the well's useful life to about two years at the same injection rate.
- Published through SciTech Connect.
Stone, R.; Morse, J.G.
- Funding Information:
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