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Title: Mechanism of induced seismicity at the Geysers geothermal reservoir, California

Abstract

The Geysers reservoir is situated in a 60--80 km-wide right-lateral shear zone associated with the North American-Pacific plate boundary. A small fraction of the shear may be occurring as permanent aseismic creep, which is being converted to stick-slip movement in the Geysers reservoir due to steam production. Two mechanisms could be responsible for the induced seismicity: a large (>100 bars) increase in effective rock pressure; and an increase in the coefficient of friction. The first mechanism requires that the initial state of the reservoir be predominantly liquid-dominated. The second mechanism is a consequence of dehydration of the reservoir causing both the 'hardening' of clay and fault gouge, and the precipitation of silica.

Authors:
Publication Date:
Research Org.:
Geophysics Div., D.S.I.R., Private Bag, Taupo, New Zealand
OSTI Identifier:
6700985
Resource Type:
Journal Article
Journal Name:
Geophys. Res. Lett.; (United States)
Additional Journal Information:
Journal Volume: 9:6
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 15 GEOTHERMAL ENERGY; GEYSERS GEOTHERMAL FIELD; SEISMICITY; CREEP; FRICTION; PLATE TECTONICS; RESERVOIR ROCK; SLIP; STRESSES; GEOTHERMAL FIELDS; MECHANICAL PROPERTIES; TECTONICS; 580201* - Geophysics- Seismology & Tectonics- (1980-1989); 150201 - Geology & Hydrology of Geothermal Systems- USA- (-1989)

Citation Formats

Allis, R G. Mechanism of induced seismicity at the Geysers geothermal reservoir, California. United States: N. p., 1982. Web. doi:10.1029/GL009i006p00629.
Allis, R G. Mechanism of induced seismicity at the Geysers geothermal reservoir, California. United States. https://doi.org/10.1029/GL009i006p00629
Allis, R G. Tue . "Mechanism of induced seismicity at the Geysers geothermal reservoir, California". United States. https://doi.org/10.1029/GL009i006p00629.
@article{osti_6700985,
title = {Mechanism of induced seismicity at the Geysers geothermal reservoir, California},
author = {Allis, R G},
abstractNote = {The Geysers reservoir is situated in a 60--80 km-wide right-lateral shear zone associated with the North American-Pacific plate boundary. A small fraction of the shear may be occurring as permanent aseismic creep, which is being converted to stick-slip movement in the Geysers reservoir due to steam production. Two mechanisms could be responsible for the induced seismicity: a large (>100 bars) increase in effective rock pressure; and an increase in the coefficient of friction. The first mechanism requires that the initial state of the reservoir be predominantly liquid-dominated. The second mechanism is a consequence of dehydration of the reservoir causing both the 'hardening' of clay and fault gouge, and the precipitation of silica.},
doi = {10.1029/GL009i006p00629},
url = {https://www.osti.gov/biblio/6700985}, journal = {Geophys. Res. Lett.; (United States)},
number = ,
volume = 9:6,
place = {United States},
year = {1982},
month = {6}
}