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Seismic attribute extracting method

A technology for seismic attributes and extraction methods, applied in seismic signal processing and other directions, can solve problems such as indistinguishability, save manpower and material resources, simplify operation steps, and improve efficiency.

Inactive Publication Date: 2011-06-15
武侯区巅峰机电科技研发中心
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Problems solved by technology

However, the current seismic inversion is only P-wave impedance inversion. When calcareous mudstone appears in the formation, its velocity and impedance values ​​will be close to or greater than those of sandstone reservoirs, making the two indistinguishable

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Embodiment Construction

[0020] The present invention will be further described below.

[0021] Such as figure 1 As shown, the seismic attribute extraction method, its basic operation steps include:

[0022] (1) Obtain three data volumes: P wave, Poisson's ratio channel integral, and PGRC fluid detection from earthquakes;

[0023] (2) Analyze the basic attributes of each data body;

[0024] (3) For each data body, select its sensitive attributes;

[0025] (4) Analyze the evolution history of seismic facies according to sensitive attributes;

[0026] (5) Obtain seismic attributes from the evolution history of seismic facies.

[0027] The basic attributes in the step (2) include amplitude, instantaneous phase, instantaneous frequency and coherence.

[0028] The sensitive attribute is one of amplitude, instantaneous phase, instantaneous frequency, and coherence.

[0029] Each of the data volumes has at least one sensitive attribute.

[0030] The P-wave data body determines the boundaries of pinch-...

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Abstract

The invention discloses a seismic attribute extracting method which belongs to a seismic analysis technical and mainly solves the problems of inaccurate seismic attribute extraction and low extraction efficiency. The seismic attribute extracting method comprises the following steps of: (1) acquiring a P wave, a Poisson's ratio trace integration and PGRC fluid from seism and detecting the three data volumes; (2) carrying out base attribute analysis on each data volume; (3) selecting the sensitive attribute of each data volume; (4) carrying out seismic phase evolutional history analysis according to the sensitive attributes; and (5) acquiring the seismic attribute from the seismic phase evolutional history. The method has higher seismic attribute extraction accuracy and extraction efficiency and higher practical value.

Description

technical field [0001] The invention relates to earthquakes, in particular to a method for extracting seismic attributes. Background technique [0002] At present, the exploration of subtle oil and gas reservoirs has become one of the important tasks of oil and gas exploration. How to use seismic data to identify lithological traps has become an important research content for deepening oil and gas exploration in the abdomen. This project aims to achieve the purpose of accurately identifying underground exploration targets by digging deep into the application potential of seismic data. Through pre-stack AVO attribute and AVO oil-gas prediction, use AVO seismic processing data to the greatest extent and with the highest accuracy, convert attribute information in pre-stack seismic data into geological information, study the law of oil and gas distribution, and provide reference for exploration deployment . [0003] Lithologic trap identification should be based on theories of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
Inventor 黄友华
Owner 武侯区巅峰机电科技研发中心
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