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Permeability of rock samples from Cajon Pass, California

Geophysical Research Letters

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Abstract

Room temperature, steady-state flow measurements of permeability were conducted on 15 unfractured core samples collected at depths between 270 and 2100 m in the Cajon Pass drillhole. Confining and pore pressures were set to the lithostat and hydrostat for each depth. The first 500 m encountered in the drill hole is composed of sandstones with typically high permeabilities of around 10-17m2. The crystalline rocks between 500 and 2100 m show a systematic decrease in permeability with depth from 10-19 to less than 10-21m2. These values are particularly low relative to the applied effective stresses of only 10-30 MPa, and may be a result of the extensive crack healing that was observed in most samples. -Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Permeability of rock samples from Cajon Pass, California
Series title:
Geophysical Research Letters
Volume
15
Issue:
9
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
1033
Last page:
1036
Number of Pages:
4