A Residual Static Correction Method for the Stacked Section of Reflection-Converted Shear-wave Common Receiver Points
A technology of converted shear wave and common receiver points, applied in the field of residual static correction of converted wave seismic data processing, can solve the problems of separation, uneven lateral velocity of underground medium, low frequency, etc., and achieve the effect of improving quality
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example 1
[0058] figure 1 It is a schematic diagram of the steps of picking seed points on the horizon line selected by the reflected longitudinal wave common receiver point stacking profile of the residual static correction method for the reflection converted shear wave common receiver point stacking profile according to an exemplary embodiment of the present invention. figure 2 It is a schematic diagram of the step of forming the first time window of the residual statics correction method for the reflection-transformed shear-wave co-receiver point stacking section according to an exemplary embodiment of the present invention.
[0059] refer to figure 1 , the residual static correction method for the reflection-transformed shear-wave co-receiver point stack section in this example includes the following steps:
[0060] (1) First, on the stacked section Stack1 of the PP wave common receiver point (the section has 200 traces of data), select a horizon line 1 with a continuous and clear...
example 2
[0071] (1) First, similar to Example 1, on the PP-wave common receiver point superposition section Stack1 (the section has 200 traces of data), select a horizon line 1 with a continuous and clear event, and construct the direction according to the selected horizon line 5 seed points are picked up where the change occurs. Connect various sub-points, and use linear interpolation for the points between the two sub-points to obtain a polyline. Taking this folded line as the baseline, move T (T=100ms) upward along the time axis to form the upper boundary line of the first time window, and move T (T=100ms) downward along the time axis to form the lower edge of the first time window The boundary line, that is to say, the data of T=100ms are taken up and down along the time axis to form new data of 200 tracks*201ms.
[0072] In the first time window, the cross-correlation method is used to obtain the PP wave level line. Specifically, the i-th seismic data in the first time window is...
example 3
[0083] (1) Use the same operation as Example 1 and Example 2, that is, take 5 seed points on the stacked section Stack1 of PP wave common receiver points and connect them, and then expand to form the first time window.
[0084]In the first time window, the PP wave horizon line is obtained by using the seed trace cross-correlation method. Specifically, superimpose the data from the i-5th to the i+5th channel to obtain the seed channel, and then perform cross-correlation between the i-th channel data and the seed channel, i=n to N-n channel, that is, take i from 5 to 195 channels , get the new data composed of cross-correlation results, find the maximum absolute value (maximum correlation value) of each track of the new data corresponding to the position Time, record Time and project it onto the superposition section of the PP wave common receiver point, then Get HorPP automatically tracked.
[0085] (2) According to the velocity ratio of the PS wave horizon and the PP wave hor...
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