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A method and device for amplitude compensation of three-dimensional post-stack seismic data

A seismic data and amplitude compensation technology, applied in the direction of seismic signal processing, etc., can solve the problem of abnormal attenuation of the underlying stratum amplitude, and achieve the effect of good application effect.

Active Publication Date: 2017-04-12
PETROCHINA CO LTD
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Problems solved by technology

[0004] In order to solve the problems in the prior art, the present invention proposes a method and device for amplitude compensation of three-dimensional post-stack seismic data, which solves the problem of abnormal attenuation of the amplitude of the underlying stratum of special lithology bodies with high wave impedance in three-dimensional post-stack seismic data

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  • A method and device for amplitude compensation of three-dimensional post-stack seismic data

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[0055] 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.

[0056] The working principle of this technical solution is: start with three-dimensional post-stack seismic data, and use the real reflection coefficient of the formation calculated from the logging data of the amplitude attenuation zone. Then, combined with Kriging interpolation method, a geostatistical method, the amplitude of the 3D seismic data in the amplitude attenuation area is effectively compensated. Under the premise of ensuring the accuracy and reli...

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Abstract

The invention relates to a three-dimensional post-stack seismic data amplitude compensation method and device. The method includes: in three-dimensional post-stack seismic data, extracting time domain seismic wavelets and a seismic effective frequency band range from an amplitude non-weakening area, and determining a time domain drilling reflection coefficient of a seismic data amplitude weakening area; obtaining a time domain well drilling synthetic seismic recording trace through the time domain seismic wavelets and the time domain well drilling reflection coefficient; obtaining an amplitude spectrum of a seismic trace near a well according to the seismic trace near the well of a time domain in the three-dimensional post-stack seismic data, and obtaining a well drilling synthetic seismic recording trace amplitude spectrum according to a time domain well drilling synthetic seismic recording trace; using the amplitude spectrum of the seismic trace near the well and the well drilling synthetic seismic recording trace amplitude spectrum to obtain an amplitude compensation factor; performing three-dimensional interpolation processing on the amplitude compensation factor in the seismic effective frequency band range; determining the boundary of the amplitude weakening area in the three-dimensional post-stack seismic data; and using the amplitude compensation factor and the boundary of the amplitude weakening area to perform amplitude compensation on the three-dimensional post-stack seismic data.

Description

technical field [0001] The invention relates to the technical field of post-stack seismic data processing, in particular to a three-dimensional post-stack seismic data amplitude compensation method and device. Background technique [0002] With the continuous deepening of oil and gas exploration at home and abroad, the comprehensive geological interpretation method using seismic data as the main interpretation platform has been widely used, which also puts forward higher requirements for the imaging quality of post-stack seismic data. [0003] In the current oil and gas exploration process, seismic interpretation is still based on post-stack seismic data interpretation. Due to the influence of some special lithology bodies with high wave impedance such as igneous rocks and carbonate rocks, the seismic reflection characteristics of the underlying strata are distorted, especially the amplitude The attenuation is severe and the imaging quality deteriorates, which has a serious ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
Inventor 姚军李双文倪长宽张晶
Owner PETROCHINA CO LTD
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