A long-wavelength static correction method for well control in Loess Plateau seismic data

Abstract

The invention provides a method for well-controlled medium and long-wavelength static correction of loess tableland seismic data, which belongs to the field of petroleum geophysical exploration. The method comprises: (1) inputting the surface elevation file of the data processing range, including X, Y coordinates and elevation information; (2) calculating the elevation smoothing parameters k, l, and then smoothing the input surface elevation file; (3) Controlling medium and long wavelength static correction function fitting; (4) Calculating medium and long wavelength static correction amount. The invention can effectively calculate the long-wavelength static correction problem in loess plateau seismic data through the control of a small number 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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