A Joint Velocity Analysis Method Based on Multi-component Data Based on P-S Wave Matching
A technology combining velocity and analysis methods, applied in the field of geophysical exploration data processing, can solve the problems of increased length and offset of three-component acquisition arrangement, difficulty in velocity analysis of converted wave data, and asymmetric propagation paths of converted waves, etc. Processing results, high signal-to-noise ratio, high-resolution effects
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[0038] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0039] A multi-component data joint velocity analysis method based on compressional and shear wave matching, comprising the following steps:
[0040] (1) Dynamic common reflection point gather extraction of longitudinal and transverse wave fields
[0041] Step 1: extracting longitudinal wave CDP gather data and converting shear wave ACP gather data;
[0042] Step 2: Roughly estimate the maximum value of the P-to-S wave velocity ratio in the work area γ max and the minimum depth range h that needs to be considered during processing min , calculate the transition point position x corresponding to each seismic trace under the depth-velocity ratio p1 with y p1 ;
[0043] Step 3: Roughly estimate the minimum value of the P-to-S wave velocity ratio in the work area γ min And based on this, calculate the asymptotic transition point position x corresponding to each seis...
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