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Abnormal structure identification method and device

An abnormal structure and identification method technology, applied in the field of seismic geophysical exploration and interpretation, can solve problems such as inability to accurately identify abnormal structures, and achieve the effect of enriching and comprehensive geological anomaly information and improving identification accuracy.

Active Publication Date: 2017-09-08
PETROCHINA CO LTD
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Problems solved by technology

However, when the structure of the work area is complex (for example, there are inclined strata with a large dip angle, etc.), the existing coherent volume technology cannot accurately identify the abnormal structure

Method used

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  • Abnormal structure identification method and device
  • Abnormal structure identification method and device

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Embodiment Construction

[0055] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0056] In the process of implementing the present application, the inventors of the present application found that the structural dip and structural direction will affect the coherence result. specific:

[0057] A. Analysis of the impact of structural dip on coherence results

[0058] When the structure of the study area is rela...

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Abstract

The embodiments of the present invention provide an abnormal structure identification method and device. The method includes the following steps that: a complex super-trace set is constructed according to seismic data within a work area, wherein the complex super-trace set contains delay time of each of adjacent seismic traces; under each given structural trend, delay time satisfying a preset condition is determined from the delay time of each of the adjacent seismic traces; under each of the structural trends, the complex correlation coefficients of the structural trends after corresponding delay time is delayed are obtained; and an abnormal structure and the structural trend thereof in the work area are determined according to the complex correlation coefficients of the structural trends after the corresponding delay time is delayed. With the abnormal structure identification method and device provided by the embodiments of the present invention adopted, the identification accuracy of the abnormal structure can be improved.

Description

technical field [0001] The present application relates to the technical field of seismic and geophysical prospecting interpretation, in particular to a method and device for identifying abnormal structures. Background technique [0002] Accurate identification of abnormal underground structures is of great significance for the comprehensive prediction and evaluation of reservoirs and the reduction of oil and gas prediction risks. At present, coherent volume technology is commonly used to identify abnormal structures in the subsurface. Among them, coherent volume technology is a seismic data analysis technology that converts three-dimensional amplitude data into a correlation coefficient data volume through the similarity analysis of seismic traces, and then highlights irrelevant anomalies. Therefore, coherent volume technology can be used to identify non-similar abnormal structures such as faults and cracks. Moreover, with the rapid development of 3D seismic exploration te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 王尚旭高建虎袁三一李胜军王铁一马铭刘颖
Owner PETROCHINA CO LTD
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