Range of investigation of a borehole gravimeter [electronic resource].

Published: Livermore, Calif. : Lawrence Livermore Laboratory, 1977.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: Pages: 14 : digital, PDF file
Additional Creators: Lawrence Livermore Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

Concepts of the range of investigation of a borehole gravimeter are reviewed. It is shown that the maximum sensitivity to a mass point at a horizontal distance R from a borehole occurs at a vertical distance Z = R/..sqrt..2. Thus, the angle of maximum sensitivity is about 55/sup 0/ from the vertical. It is also shown that the absolute value of the gravitational effect decreases with increasing R. There are two maxima of the vertical gradient of gravity (at Z = 0 and at Z = ..sqrt../sup 3///sub 2/ R). The minimum distance required between gravimeter stations to obtain a usable measurement can be determined. The slab radius R for which the gravitational effect of a horizontal slab is equal to 45%, 90%, etc., of that of an infinite horizontal slab is a function of the measurement spacing. The closer the measurement spacing, the more information obtained.

Report Numbers

E 1.99:ucrl-78875
E 1.99: conf-770626-1
conf-770626-1
ucrl-78875

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Note

Published through SciTech Connect.
02/22/1977.
"ucrl-78875"
" conf-770626-1"
18. annual symposium of the Society of Professional Well Log Analysts, Houston, TX, USA, 5 Jun 1977.
Hearst, J.R.

Funding Information

W-7405-ENG-48

View MARC record | catkey: 14385934