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High-precision detection method for seismic signal coherence

A detection method and seismic signal technology, applied in seismic signal processing, seismology, geophysical measurement, etc., can solve problems such as low resolution, fuzzy fault details, unclear stratum discontinuity, etc., to improve resolution , Enhanced processing accuracy and effect, accurate and intuitive results

Active Publication Date: 2018-04-17
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0009] In view of this, the present invention provides a high-precision detection method for seismic signal coherence, which aims to solve the problems of low resolution, unclear stratum discontinuity, and fuzzy fault details in the processing results of the existing third-generation coherence algorithm. The problem

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  • High-precision detection method for seismic signal coherence
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  • High-precision detection method for seismic signal coherence

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[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051]The embodiment of the present invention discloses an improved high-precision seismic signal coherence detection method based on Gaussian kernel function and high-order derivatives. It improves the coherence attribute of three-dimensional seismic data on the basis of the third-generation coherence algorithm, and obtains the resolution A better data volume. The method is effective and can effectively guide the fault description and structural detail descri...

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Abstract

The invention discloses a high-precision detection method for seismic signal coherence, wherein the high-precision detection method is improved on the basis of a Gaussian kernel function and a higherderivative. On the basis of an eigenvalue coherence algorithm, also called as a third generation coherence algorithm, a third generation coherent data volume is convoluted with the Gaussian kernel function, a second-order partial derivative of the obtained new data volume on a main line and a crossline and in time direction is solved, maximum eigenvalue of data after derivation is solved, and themaximum eigenvalue is taken as a final result of an improved algorithm, so that a new coherent result is obtained. The high-precision detection method disclosed by the invention is used for detectingsimilarity, namely coherence, of a seismic signal, so that the high-precision detection method is applied to identification and prediction of a subsurface fault, a fracture-developed zone and some sedimentary characteristics; meanwhile, the high-precision detection method disclosed by the invention can more clearly show spatial distribution of a fault and reflect detail characteristics of a subsurface structure and a sedimentary environment, so that a new promoting effect is produced to scientific research.

Description

technical field [0001] The invention relates to the technical field of seismic signal attribute analysis in seismic exploration, in particular to a high-precision detection method for seismic signal coherence, which is used for detecting the similarity of seismic signals. Background technique [0002] With the gradual advancement of seismic exploration technology, coherent volume technology, that is, the similarity comparison technology of seismic signals, has gradually come to the fore, forming an efficient, accurate and widely used seismic attribute interpretation technology. It plays a certain positive role in the development of permanent oil and gas reservoirs. [0003] In 1955, Simpson first proposed the concept of coherence between adjacent seismic traces. In 1995, M. Bahorich and S. Farmer formally proposed the application of coherence in seismic data. In view of its great role in fault interpretation, this theory was quickly obtained. development and application. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/307G01V2210/63
Inventor 阎建国王弘扬李远娟宋鑫磊姚佳芮伍广广任秋月
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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