Numerical studies of cold water injection into vapor-dominated geothermal systems [electronic resource].
- Berkeley, Calif. : Lawrence Berkeley National Laboratory, 1991. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: (27 pages) : digital, PDF file
- Additional Creators:
- Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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- Free-to-read Unrestricted online access
- Recent reservoir pressure and steam flow rate declines at The Geysers geothermal field in California have attracted interest in studies of increased cold water injection into this system. In this paper, numerical studies of such injection into a fractured vapor-dominated reservoir are conducted using a two-dimensional radial, double-porosity model. The results obtained indicate that cold water injection into superheated (low-pressure) zones will greatly enhance the productivities of steam wells. Injection into two-phase zones with significant liquid reserves in the matrix blocks does not appear to aid in steam recovery until most of the original liquid reserves are depleted. Sensitivity studies are conducted over the range of fracture and matrix permeabilities applicable to the Geysers. The sensitivity of the grid size is also conducted, and shows very large grid effects. A fine vertical space discretization near the bottom of the reservoir is necessary to accurately predict the boiling of the injected water. 28 refs., 15 figs., 3 tabs.
- Published through SciTech Connect., 01/01/1991., "lbl-30173", " conf-910308--1", "DE91012295", Western regional meeting and exhibition of the Society of Petroleum Engineers (SPE), Long Beach, CA (USA), 20-22 Mar 1991., Bodvarsson, G.S.; Lai, C.H., CASLC, and California State Lands Commission, Sacramento, CA (USA)
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