Tomographic static correction fusion method and system for earthquake data

Abstract

The invention discloses a tomographic static correction fusion method and system for the earthquake data. A refraction tomographic static correction method and a first-motion wave tomographic static correction method are effectively fused; the refraction tomographic static correction method is employed for a region having a stable refraction layer, the first-motion wave tomographic static correction method is employed for a region with relatively violent low deceleration zone change, and advantages of the refraction tomographic static correction method and the first-motion wave tomographic static correction method are integrated, so regions with the stable refraction layer and regions with relatively violent low deceleration zone change are made to have excellent imaging effects. The method is advantaged in that a technical problem that the imaging effect is poor in the prior art as a single tomographic static correction method is employed for a work region of which a part of the region has the stable refraction layer and a part of the region has no stable refraction layer is effectively solved.

Description

technical field [0001] The invention relates to the technical field of seismic signal processing, in particular to a tomographic static correction fusion method and system for seismic data, aiming to solve the problem of poor imaging effect caused by a single tomographic static correction method for desert areas. Background technique [0002] In recent years, seismic exploration has developed into areas with complex surface conditions such as desert areas, loess-covered areas, and mountainous areas. Complex surface conditions have caused great difficulties in seismic data processing, making seismic images difficult to accurately reflect the underground geological structure. true form. Therefore, accurately estimating the surface velocity model and eliminating static correction problems caused by complex surface factors on seismic data are technical difficulties in seismic data processing in complex areas. The purpose of seismic data processing is to ensure reliable structur...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the imaging effect obtained by using a single tomographic static correction method is poor for the work area where there is a stable refraction layer in some areas and there is no stable refraction layer in some areas.

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