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Hydrologic Imaging of Fractured Rock

Published online by Cambridge University Press:  15 February 2011

Kenzi Karasaki ,
Andrew Cohen ,
Paul Cook ,
Barry Freifeld ,
Ken Grossenbacher ,
John Peterson  and
Don Vasco
Kenzi Karasaki
Affiliation:
Lawrence Berkeley Laboratory, 1 Cyclotron Rd., Berkeley, California, USA 94720.
Andrew Cohen
Affiliation:
Lawrence Berkeley Laboratory, 1 Cyclotron Rd., Berkeley, California, USA 94720.
Paul Cook
Affiliation:
Lawrence Berkeley Laboratory, 1 Cyclotron Rd., Berkeley, California, USA 94720.
Barry Freifeld
Affiliation:
Lawrence Berkeley Laboratory, 1 Cyclotron Rd., Berkeley, California, USA 94720.
Ken Grossenbacher
Affiliation:
Lawrence Berkeley Laboratory, 1 Cyclotron Rd., Berkeley, California, USA 94720.
John Peterson
Affiliation:
Lawrence Berkeley Laboratory, 1 Cyclotron Rd., Berkeley, California, USA 94720.
Don Vasco
Affiliation:
Lawrence Berkeley Laboratory, 1 Cyclotron Rd., Berkeley, California, USA 94720.
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Abstract

Various geophysical and hydrologic tests were conducted in a cluster of nine wells to image the hydrologic connections of a fractured rock mass. Results of intra-borehole flow surveys and cross-hole radar and seismic tomography surveys correlated very well, and indicated that there is a major feature at a depth of 30m. Systematic injection tests were conducted in all nine wells. Three to four intervals in each well were isolated using pneumatic packers. Each interval was equipped with a high resolution pressure transducer. Some 130 injection tests were conducted, and more than 4,100 cross-hole transient pressure measurements were obtained. A computer algorithm was developed to analyze such massive interference data systematically. As a result of the analysis, an image of the fracture connections emerged which is consistent with the geophysical data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 379
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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