The Impact of Injection on Seismicity at The Geyses, CaliforniaGeothermal Field [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:: United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Water injection into geothermal systems has often become arequired strategy to extended and sustain production of geothermalresources. To reduce a trend of declining pressures and increasingnon-condensable gas concentrations in steam produced from The Geysers,operators have been injecting steam condensate, local rain and streamwaters, and most recently treated wastewater piped to the field fromneighboring communities. If geothermal energy is to provide a significantincrease in energy in the United States (US Department of Energy (DOE)goal is 40,000 megawatts by 2040), injection must play a larger role inthe overall strategy, i.e., enhanced geothermal systems, (EGS). Presentedin this paper are the results of monitoring microseismicity during anincrease in injection at The Geysers field in California using data froma high-density digital microearthquake array. Although seismicity hasincreased due to increased injection it has been found to be somewhatpredicable, thus implying that intelligent injection control may be ableto control large increases in seismicity.

Report Numbers:

E 1.99:lbnl--61693
lbnl--61693

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Note:

Published through SciTech Connect.
09/25/2006.
"lbnl--61693"
": EB4005020"
International Journal of Rock Mechanics&MiningSciences 44 8 FT
Majer, Ernest L.; Peterson, John E.
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)

Funding Information:

DE-AC02-05CH11231
G32737

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