Long wavelength static correction method in loess plateau seismic data well control

Abstract

The present invention provides a long wavelength static correction method in loess plateau seismic data well control, belonging to the field of geophysical prospecting for petroleum. The long wavelength static correction method comprises: (1) inputting a surface elevation file in the range of data processing, the file consisting of X and Y coordinates and elevation information; (2) calculating elevation smoothing parameters k and l, and performing smoothing of the inputted surface elevation file; (3) performing function fitting of the long wavelength static correction in the well control; and (4) calculating the long-period static correction. According to the invention, long-period static corrections in the loess plateau seismic data may be effectively calculated through controlling of a small amount of wells.

Description

technical field [0001] The invention belongs to the field of petroleum geophysical exploration, and in particular relates to a method for well-controlled medium and long-wavelength static correction of loess plateau seismic data. Background technique [0002] The surface conditions of the loess plateau area in the south of the Ordos Basin are vertical and horizontal, and the surface is undulating violently. The extremely thick loess on the surface causes serious static correction problems. Iteration has better solved the problem of middle-wavelength and short-wavelength static correction, but there is still a relatively serious problem of long-wavelength static correction. The processing results have false structures related to surface elevation, which affects the structural interpretation of seismic data. How to eliminate the problem of remaining middle- and long-wavelength static correction is a major difficulty in the processing of loess plateau seismic data, and there is...

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Problems solved by technology

[0002] The surface conditions of the loess plateau area in the south of the Ordos Basin are vertical and horizontal, and the surface is undulating violently. The extremely thick loess on the surface causes serious static correction problems. Iteratively, the problem of middle-wavelength and short-wavelength static correction is better solved, but there is still a relatively serious problem of long-wavelength static correction, and there are false structures related to surface elevation in the processing results, which affect the structural interpretation of seismic data

How to eliminate the problem of remaining medium- and long-wavelength static correction is a major difficulty in the processing of loess plateau seismic data, and there is no effective method to solve this problem

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