| 摘要 |
This invention relates to a method of increasing resolution of high-intensity amplitude events in seismic records provided by common midpoint collection methods (CMP) wherein nonsymmetrical travel paths of incident and reflected rays of the generated conventional waves are taken into account prior to trace stacking due to the dip and depth of the target reflector. Then in accordance with the invention, the converted phases of the conventional seismic wave, are processed as to define a series of common reflection point (CRP) coordinates each associated with a gather of converted traces as if a source associated with a given corrected trace was placed at each CRP and activated followed immediately by the relocation of a detector at the CRP and the reception of converted phases of the generated wave comprising the trace where the equation of coordinate transformation is selected from the group comprising: CRP = kD + (1 - k)SP: for conversions of P-waves to Sv-waves at the target; CRP = (1 - k)D + kSP: for conversions of Sv-waves to P-waves at the target; where <IMAGE> <IMAGE> Vp and Vs are the P-wave and Sv-wave velocities, respectively, of the overburden; X is the source-receiver offset distance; h is the depth of the target reflector; alpha is the dip angle of the target reflector; and SP and D are source and detector coordinates, respectively, along the line of survey. Further aspects of the invention relate to improving the diagnostic qualities of zero offset sections of conventional and converted traces (collected simultaneously via a series multicomponent detectors) by their display on a side-by-side basis.
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