Method and device for analyzing focusing energy of diffracted waves

Abstract

The invention provides a method and a device for analyzing focusing energy of diffracted waves. The method comprises the steps of extracting common offset diffracted wave data from acquired seismic common offset data; acquiring angle gather seismic data according to a seismic wave offset velocity file of the seismic common offset data and the common offset diffracted wave data; extracting a diffracted wave target amplitude value from the angle gather seismic data, and enabling the extracted target amplitude value to act as a diffracted wave energy vector in a diffracted wave energy vector group; calculating a variance value of each diffracted wave energy vector in the diffracted wave energy vector group so as to acquire a plurality of variance values; and searching the maximum variance value in the plurality of variance values, and enabling the maximum variance value to act as target focusing energy. According to the method provided by the invention, the focusing energy of the diffracted waves can be solved accurately, diffracted wave focusing and imaging are realized, and a purpose of accurately positioning small-scale heterogeneous geologic bodies in the underground space is achieved. The method relieves a technical problem of poor accuracy when the focusing energy of the diffracted waves is solved in the prior art.

Description

technical field [0001] The invention relates to the technical field of high-resolution seismic exploration, in particular to an analysis method and device for focusing energy of diffracted waves. Background technique [0002] In seismic exploration, it is a challenging task for exploration personnel to locate non-uniform discontinuous geological bodies such as faults, unconformities, small fault blocks, fractures and collapse columns. The conventional processing technology is to improve the seismic resolution by using methods such as coherence analysis, anti-fuzzy filtering and structure-guiding filtering on the imaging section. However, since this type of method belongs to the field of image-driven processing, it is easy to generate false structures, and its theory is based on the convolution (multidimensional) model of seismic zone-limited wavelets and infinitely thin reflection coefficients, so this method cannot break through the Rayleigh criterion. Essentially, convent...

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a method and device for analyzing the focused energy of diffra

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