Off-Center Monopole And Dipole Sources In Fluid-Filled Boreholes
Name
1996.5 Tadeau et al.pdf
Size
550.95 KB
Format
Adobe PDF
Checksum (MD5)
5fd66a1afd2877ae8bc71d9a913b5329
Author(s)
Tadeu, Antonio J. B.
Toksoz, M. Nafi
Kausel, Eduardo
Date Issued
1996
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;1996-05
Abstract
A variety of seismic testing techniques rely on the use of seismic sources, detectors, or
both, placed at some depth below the ground surface; these are often installed within
fluid-filled boreholes. The interpretation of the records obtained in the course of such
explorations requires a thorough understanding of how waves propagate in the borehole
and its immediate vicinity. Depending on the distance between the source and the
receiver as well as their placement and orientation relative to the axis of the borehole, it is known that very complex wave patterns may arise. In this paper, analytical-numerical solutions are used to study the wave-field elicited by monopole or dipole sources within a fluid-filled cylindrical cavity drilled through an unbounded homogeneous elastic medium. This model is used to assess the effects of a source-receiver tool, placed in an off-centered and/or tilted position inside the fluid-filled borehole, on the propagation of both axisymmetric and non-axisymmetric wave modes.
Persistent DSpace Link
