Method of co-imaging point stacking for seismic data

Abstract

The present invention provides a method for stacking common imaging points of seismic data, comprising: inputting the seismic data of a single seismic channel; performing Kirchhoff pre-stack time migration on the line connecting the rotating coordinate axis to the shotgun point; setting the line number of the imaging point of the imaging section The line number is 0; the offset processing is carried out in the rotating coordinate system to obtain the imaging section on the straight line parallel to the line of the shot inspection point and the minimum distance is one line distance; the imaging point line number of the imaging section is set to 1; according to this method Perform Kirchhoff pre-stack time migration processing on this trace to obtain an imaging profile whose line number ranges from negative N to positive M; process all seismic traces; migrate all seismic traces to obtain imaging points that are rearranged and superimposed according to the coordinates of the imaging points Get a new offset profile. The seismic data co-imaging point stacking method can use the seismic data to perform effective migration stacking imaging, and realize the migration stacking imaging of the seismic data.

Description

technical field [0001] The invention relates to the field of oil and gas exploration seismic data processing, in particular to a method for stacking common imaging points of seismic data. Background technique [0002] Using migration principle to image seismic data is an effective seismic data imaging method. Generally, migration stacking imaging is performed by using the migration method. All seismic traces need to be processed and then stacked for the calculation of an imaging point. [0003] The general practice is not to first calculate the imaging points on the line of the seismic traces, then calculate the imaging points parallel to the line of the imaging points, and finally perform superposition according to the coordinates of the imaging points. In this way, the calculation of an imaging point is It is not necessary to process all seismic traces, but to calculate an imaging point, all seismic traces need to be processed, and then calculate all imaging points in thi...

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Problems solved by technology

[0003] The general practice is not to first calculate the imaging points on the line of the seismic traces, then calculate the imaging points parallel to the line of the imaging points, and finally perform superposition according to the coordinates of the imaging points. In this way, the calculation of an imaging point is It is not necessary to process all the seismic traces, but the calculation of an imaging point needs to process all the seismic traces, and then calculate all the imaging points in this way, the effect of the migration profile is not good

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