Production method for prestack depth domain synthetic seismogram
A technique for synthesizing seismic records and production methods, which is applied in seismic signal recording and other directions, and can solve problems such as loss of reflection coefficient information, lack of effective information, and failure to consider the nature of seismic wavelet changes in depth domains, etc.
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[0030] Embodiments of the present invention include the following steps: (1) input depth domain seismic data and elastic parameter (compressional wave velocity, shear wave velocity and density) model, obtain depth domain seismic reflection coefficient R (θ, iΔh) according to AVO equation calculation; (2 ) using the P-wave velocity field to convert the depth domain seismic data to the velocity V mIn the constant velocity depth domain under , extract the depth domain seismic wavelet W required for synthetic seismic records Vm (jΔh pse ); (3) Using the depth-domain P-wave velocity model and the constant velocity V m , and map the sampling interval sequence in the depth domain to the constant velocity depth domain to obtain the non-uniform sampling interval sequence in the constant velocity depth domain; (4) pick up the seismic wavelet W in the constant velocity depth domain Vm (jΔh pse ) peak depth value, using this depth and the non-uniform sampling interval sequence in the c...
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