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Method of c3 coherent volume based on wide azimuth data

A wide-azimuth, coherent body technology, applied in seismic signal processing and other directions, can solve problems such as fault structure detection of small-scale geological structures, and achieve good robustness

Inactive Publication Date: 2016-12-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0024] The technical problem to be solved by the present invention is to propose a method of C3 coherent body based on wide azimuth angle data in view of the problem existing in the prior art that the fault structure cannot be detected for relatively small-scale geological structures

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  • Method of c3 coherent volume based on wide azimuth data
  • Method of c3 coherent volume based on wide azimuth data
  • Method of c3 coherent volume based on wide azimuth data

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Embodiment Construction

[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0048] Such as figure 2 Shown is the algorithm block diagram of the method for the C3 coherent body based on the wide azimuth angle data of the embodiment of the present invention, specifically comprising the following steps:

[0049] Step 1: Read the 3D seismic data volumes of each azimuth in the operating area;

[0050] Step 2: Taking the target point as the center, extract the time window length N from each wide-azimuth 3D seismic data volume t and arrange the data of each angle according to the order of angle values ​​to form a two-dimensional matrix Trace. The matrix Trace contains the data...

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Abstract

The invention discloses a method for C3 coherent volume based on wide azimuth data, which comprises the following steps: reading three-dimensional seismic data volumes of various azimuth angles, reading trace data from the wide-azimuth three-dimensional seismic data volume, and calculating targets The correlation matrix of the points, the eigenvalue decomposition of the correlation matrix, the calculation of the coherence value of the target point, and the calculation of all the coherence values ​​of the complete individual form a coherent body. The beneficial effects of the present invention are as follows: the present invention is based on the third-generation coherent body technology and utilizes the abundant information of the wide-azimuth seismic data, and can study the stable and robust wide-azimuth calculated according to the variation of the amplitude with the azimuth angle. Coherent bodies can detect fault structures in relatively small-scale geological structures, and can obtain more precise predictions of faults and fractures.

Description

technical field [0001] The invention belongs to the technical field of geology and relates to seismic coherent volume technology, in particular to a C3 coherent volume method based on wide azimuth angle data. Background technique [0002] With the deepening of petroleum exploration and development, the exploration objects are becoming more and more complex, and the shape and distribution of geological structures play a decisive role in the formation of some oil and gas fields. An effective method for identifying geological structure features. The coherent volume technology was formally proposed by Bahorich and Farmer at the 65th SEG annual meeting, and this technology has a good effect on geological fault interpretation. [0003] In today's geological field, the basic input of the 3D coherent volume technology is the post-stack amplitude data volume, and the 3D correlation data volume is obtained by using the local waveform similarity in the vertical and horizontal directio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 钱峰文渊胡光岷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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