Improved particle swarm algorithm for pre-stack seismic data elastic parameter inversion problem

A technology for improving particle swarms and elastic parameters. It is used in seismology, seismic signal processing, geophysical measurement, etc. to achieve the effect of simple and efficient improvement methods, less time-consuming, and simple algorithms.

Inactive Publication Date: 2018-04-06
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0004] The purpose of the present invention is to solve the traditional three-parameter inversion problem, improve the solution efficiency of the inversion problem, and provide a more efficient improved particle swarm optimization algorithm for the pre-stack seismic data parameter inversion problem

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  • Improved particle swarm algorithm for pre-stack seismic data elastic parameter inversion problem
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  • Improved particle swarm algorithm for pre-stack seismic data elastic parameter inversion problem

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[0055] In order to further facilitate those of ordinary skill in the art to better understand the essence of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:

[0056] like figure 1 As shown, the present invention provides an improved particle swarm optimization algorithm for the elastic parameter inversion problem of pre-stack seismic data, including the following steps:

[0057] Step S1: Sampling several points in the underground reservoir logging of the oil field, obtaining several sets of elastic parameters, and measuring several sets of seismic record values ​​corresponding to the sampling points;

[0058] Step S2: Initialize the several groups of elastic parameters obtained in step S1 to obtain a value range, and randomly select several groups of elastic parameters within the value range;

[0059] Step S3: using the randomly selected sets of elastic parameters obtained in...

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Abstract

The invention discloses an improved particle swarm algorithm for the pre-stack seismic data elastic parameter inversion problem. According to the method, the conventional particle swarm optimization algorithm is improved, the range of the first group of elastic parameters is constrained by using the improvement strategy when the elastic parameters are initialized and the elastic parameters are enabled to be close to the real value, and other groups of elastic parameters are constructed by using the range of difference so that the inversion accuracy can be enhanced. According to the method, theimprovement mode is simple and efficient and the algorithm is simple; the global and local search capability is high, the exploration efficiency is high, the time consumption is low and the solving efficiency is high; as for the problem of conventional three-parameter inversion, inversion of transverse wave speed, longitudinal wave speed and density parameters is great; and the amplitude seismicdata obtained by inversion are quite fit with the actual amplitude seismic data in the inversion process, and the correlation coefficient between the elastic parameters is high.

Description

technical field [0001] The invention relates to an improved particle swarm algorithm for the elastic parameter inversion problem of pre-stack seismic data, is a method for oil exploration using seismic information, and belongs to the technical field of seismic data inversion in oil and gas geophysical exploration. Background technique [0002] At present, seismic exploration is a method of petroleum exploration using seismic information. Since seismic information can reflect the variation trend of reservoir parameters, this method can be used to predict reservoir parameters. Seismic data are divided into two types: pre-stack and post-stack, because pre-stack seismic data contains more fluid information than post-stack seismic data, and the pre-stack inversion method has obvious advantages such as stable results, high resolution, and strong controllability. Advantage. Although intelligent algorithms are one of the main methods to solve problems in the field of geophysical in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/303G01V1/306G01V2210/512G01V2210/6222G01V2210/6224
Inventor 颜雪松朱志新伍庆华王丽萍
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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