Tube Waves, Seismic Waves And Effective Sources
Name
1993.9 Burridge et al.pdf
Size
1.24 MB
Format
Adobe PDF
Checksum (MD5)
f061bb5c1987fca560fd37c8a85a3f6f
Author(s)
Burridge, Robert
Kostek, Sergio
Kurkjian, Andrew L.
Date Issued
1993
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;1993-09
Abstract
A simple asymptotic analysis, based on the smallness of the ratio of the borehole radius
to the wavelength, reveals the interaction between tube waves and seismic waves. The
pressure field in a tube wave acts as a secondary source of seismic waves and conversely
an incoming seismic wave excites a tube wave. The asymptotic analysis leads to a
characterization of these sources in terms of the solution to two-dimensional elastostatic problems. These may be solved exactly when the borehole has an elliptical cross-section even in an anisotropic formation. Also the borehole need not be straight provided that its radius of curvature is large compared with a wavelength.
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