Seismic signal frequency division processing method

Abstract

A seismic signal frequency division processing method comprises the steps of (i) utilizing an earthquake acquisition device to obtain a seismic signal; (ii) performing format conversion on seismic data acquired in a field and meeting the format requirement of data processing; (iii) performing observing system definition and trace header setting on the seismic data meeting the format requirement; (iv) performing frequency analysis and octave scanning and quantitatively analyzing the influence of each frequency component on underground geological structure; (v) dividing the seismic signal into different frequency bodies; (vi) respectively performing exquisite seismic data processing on the frequency bodies D1, D2 and D3, including spherical diffusion compensation, earth's surface consistency residual amplitude compensation, earth's surface consistency deconvolution, predictive deconvolution, statics correction, horizontal stacking and migration imaging; (vii) reconstructing the processed frequency bodies into a final result data body according to the geological structure; (viii) performing final effective filtering and reasonable gain processing on reconstructed data body and then using the data body on the aspects of seismic exploration comprehensive research, underground geological structure explanation, inversion and fracture prediction and the like so as to help geological workers to find favorable oil and gas construction and lithologic trap and improve the well drilling accuracy.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and relates to a seismic signal processing method, in particular to a seismic signal frequency division processing method for improving the quality of seismic exploration processing in oil and gas exploration and development. Background technique [0002] Oil and natural gas play an extremely important role in the national economy. There are many methods of oil and gas exploration, among which seismic exploration is the most important method in geophysical exploration and the most effective method to solve oil and gas exploration problems. It uses artificially excited elastic waves to locate mineral deposits, determine the location, and obtain engineering geological information. Its basic principle is: when the elastic wave caused by artificial excitation propagates in the rock, if it encounters the interface of the rock layer, it will generate reflected or refracted waves, and record them ...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above-mentioned technical problems, the present invention proposes a method for frequency division processing of seismic signals. Using this method can solve the technical problems caused by the frequency components of different seismic signals being mixed together in the seismic data processing method. Due to the limitation of application, the problem of blurring the imaging of complex parts and structures in low signal-to-noise ratio data

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