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Pressure in a fluid‐filled borehole caused by a seismic source in stratified media

Author(s)
Peng, Chengbin; Lee, Jung M.; Toksoz, M. Nafi
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Abstract
A method for numerically simulating hydrophone vertical seismic profiles (VSP) and crosswell data measured in a fluid-filled borehole (either open or cased) embedded in stratified media is presented. The method makes use of both the borehole coupling theory and the global matrix formulation for computing synthetic seismograms in a stratified medium. The global matrix formulation is used to calculate the stress field at the borehole location. Borehole coupling theory is then employed to obtain the pressure in the borehole fluid. Comparisons with exact solutions for an open borehole in a homogeneous and unbounded formation show that this method is accurate for frequencies below 2 kHz. This method is used to model the Kent Cliffs hydrophone VSP data, where good agreement between the numerical simulations and the field measurements has been found, in both traveltimes and rms amplitudes of the direct P-wave. Examples show that this method is efficient and accurate, and can be applied to model VSP and crosswell experiments using an array of hydrophones.
Date issued
1996-01
URI
http://hdl.handle.net/1721.1/108327
Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology. Earth Resources Laboratory
Journal
Geophysics
Publisher
Society of Exploration Geophysicists
Citation
Peng, Chengbin, Jung M. Lee, and M. Nafi Toksöz. “Pressure in a Fluid‐filled Borehole Caused by a Seismic Source in Stratified Media.” GEOPHYSICS 61.1 (1996): 43–55. © 1996 Society of Exploration Geophysicists
Version: Final published version
ISSN
0016-8033
1942-2156

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