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Low-frequency radiation from point sources in a fluid-filled borehole.

Geophysics

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Abstract

Far-field displacement fields have been derived for an impulsive point force acting on a fluid-filled borehole wall under the assumption that the borehole diameter is small compared to the wavelength involved. The displacements due to an arbitrary source can be computed easily by combining the solutions for the impulsive sources. In general, the borehole source generates not only longitudinal and vertically polarized shear waves, but also horizontally polarized shear waves. This study also indicates that only the axisymmetric motion around the borehole due to normal stress is affected by the fluid in the borehole. In the long-wavelength limit, the presence of the fluid does not affect the radiation from tangential sources into the surrounding medium. -Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Low-frequency radiation from point sources in a fluid-filled borehole.
Series title:
Geophysics
Volume
51
Issue:
9
Year Published:
1986
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysics
First page:
1801
Last page:
1807
Number of Pages:
7