Method for exploring an environment with a complex tectonics
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United States of America Patent
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Jun 13, 2000
Grant Date -
N/A
app pub date -
Sep 20, 1996
filing date -
Jan 23, 1995
priority date (Note) -
Expired
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Abstract
The method consists in building a common midpoint gather of seismic traces of which the CMP point is said given point, subjecting the traces of this gather to dynamic and/or static corrections, and characterized in that the gather associated with the given point (A) is built by recording four CMP sub-gathers associated with said given point along four angular directions (1 to 4) passing through said given point, and dynamic and/or static corrections are applied to each of the four CMP sub-gathers in order to determine, for each sub-gather, a value of the curvature and/or the velocity optimizing the energy of the trace stack of the corrected sub-gather concerned, the four values thus obtained representing the components of the stacking velocity field desired for each of the reflector elements corresponding to the given point, and characterized by a vertical propagation time t0 with reflection for zero offset. Application in particular to the exploration of a medium with a complex tectonics.
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