Static Correction Method and Device Based on Common Attitude Gather

Abstract

The invention provides a static correction method and a static correction device on the basis of common-attitude trace gathers. The static correction method includes acquiring seismic data acquired by various detectors; linearly dynamically correcting first arrival time of the various trace seismic data according to preset seismic wave velocities on corresponding receiving windows; extracting the common-attitude trace gathers, respectively computing linear dynamic correction processing results of various trace seismic data in the common-attitude trace gathers and linear dynamic correction processing results of various trace seismic data in common-shot-point trace gathers to obtain static correction values of various shot points in the corresponding common-attitude trace gathers and static correction values of each detector in the common-attitude trace gathers, and carrying out static correction according to the static correction values of the shot points corresponding to the seismic data and the static correction values of the detectors in the common-attitude trace gathers. The static correction method and the static correction device have the advantages that problems in the aspect of attitudes of the detectors in plugging and unplugging procedures are considered, the seismic data are statically corrected according to the static correction values of the detectors plugged and unplugged at different time courses, and accordingly the precision and the accuracy of seismic data processing results can be improved.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a static correction method and device based on a common attitude gather. Background technique [0002] Seismic exploration technology is one of the important exploration methods and technologies in the fields of energy exploration engineering, geological engineering, and engineering geophysical prospecting. In the basic theory of classic seismic exploration principles, it is assumed that there is no elevation change on the surface, and the overlying stratum of the exploration target layer is a horizontal layered isotropic medium. However, in the actual industrial production of seismic exploration, due to the fluctuations in the surface elevation of the work area, and the velocity and thickness of the weathered zone in the shallow layer near the surface will vary with space, the collected seismic data does not meet the requirements of classical seismic data. Explorati...

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Problems solved by technology

[0006] In view of this, the purpose of the embodiments of the present invention is to provide a static correction method and device based on common attitude gathers, to perform static correction processing on seismic data according to the static correction amounts of geophones inserted and removed at different times, thereby solving the problem of The problem of poor precision and accuracy of seismic data processing results

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