Shear-Wave Tomographic Images Of An Oil Reservoir At MIT's Michigan Test Site
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1997.2 Zhang et al.pdf
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Author(s)
Zhang, Jie
Turpening, Roger
Chauvelier, Chantal
Morgan, F. Dale
Toksoz, M. Nafi
Queen, John
Cox, Dale
Date Issued
1997
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;1997-02
Abstract
We conducted a P- and S-wave crosswell survey with Conoco's orbital vibrator source
and three-component receivers at M.LT.'s Michigan Test Site. The receiver and source
wells bracket a known oil reservoir. Applying a nonlinear crosswell traveltime tomography
method, we reconstruct the velocity structures in the oil reservoir using P- and
S-wave data separately. The P-wave tomogram shows a similar image to the one by
Matarese (1993), and it does not present much velocity variations in the oil producing
zone. However, the S-wave tomogram clearly shows the image of the reservoir zone,
which is characterized with low velocities in a pinnacle reef. The S-wave velocities in
the reservoir are about 20% lower than those of the surrounding carbonates.
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