Properties of Cerro Prieto rock at simulated in situ conditions

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:7369402

Schatz, J F

Rocks from the Cerro Prieto Geothermal Field were tested under simulated in situ conditions in the laboratory to determine their properties and response to pore pressure reduction as would be caused by reservoir production. The primary purpose of the project was to provide information on compaction and creep as they may contribute to surface subsidence. Results show typical compressibilities for reservoir rocks of about 1 x 10/sup -6/ psi/sup -1/ and creep compaction rates of about 1 x 10/sup -9/ sec/sup -1/ when triggered by 1000 psi pore pressure reduction. This creep rate would cause significant porosity reduction if it continued for several years. Therefore it becomes important to learn how to correctly extrapolate such data to long times.

• Research Organization: Terra Tek, Inc., Salt Lake City, UT
• OSTI ID: 7369402
• Report Number(s): LBL-11967; CONF-810399-19; ON: DE82019261
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150600* -- Geothermal Energy-- Environmental Aspects
152002 -- Geothermal Data & Theory-- Properties of Minerals & Rocks
CERRO PRIETO GEOTHERMAL FIELD
COMPACTING
COMPRESSIBILITY
CREEP
GEOTHERMAL FIELDS
Geothermal Legacy
MECHANICAL PROPERTIES
MECHANICS
PERMEABILITY
PRESSURE DEPENDENCE
RESERVOIR ROCK
ROCK MECHANICS
SIMULATION