Method of conducting drilling operations using vertical seismic profiles
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United States of America Patent
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Nov 30, 1999
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N/A
app pub date -
Apr 21, 1998
filing date -
Apr 21, 1998
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Abstract
A method is described for providing improved seismic data to a driller to indicate position and spatial extent of a drilling target which may be up to several hundreds of feet ahead of a drill bit. In one embodiment, the method includes the steps of: survey design and data modeling, and definition of a drilling target point and a drilling interruption point; drilling down to a depth at which drilling will be interrupted; interruption of drilling; look-ahead borehole seismic survey (VSP); continuation of drilling; data processing and interpretation; coordinate update for optimum target intersection; and steering of drilling by borehole seismic data interpretation.
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