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Method and device for determining quality factor in depth domain

A technology of quality factor and depth domain, which is applied in the field of determination of depth domain quality factor, can solve the problems of poor accuracy and low resolution of determination of depth domain quality factor, achieve high resolution, high precision, and improve technical effects

Active Publication Date: 2020-09-08
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0006] The embodiment of the present application provides a method and device for determining the quality factor in the depth domain, so as to solve the technical problems of poor precision and low resolution in determining the quality factor in the depth domain existing in the existing method, and achieve high resolution, High-precision depth domain quality factor to improve the technical effect of seismic exploration precision

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  • Method and device for determining quality factor in depth domain
  • Method and device for determining quality factor in depth domain
  • Method and device for determining quality factor in depth domain

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Embodiment Construction

[0073] In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

[0074] Considering that most of the existing methods firstly obtain time-domain migration gathers from seismic data; then use time-domain migration gathers to extract amplitude spectrum; then extract peak frequency according to amplitude spectrum to determine the specific depth-domain quality factor. However, w...

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Abstract

Embodiments of the application provide a method and device for determining a depth domain quality factor, wherein the method comprises the following steps: acquiring a seismic record of a target area;acquiring a time domain offset gather and a seismic reflection interface according to the seismic record; performing autocorrelation processing on the time domain offset gather at the seismic reflection interface to obtain an autocorrelation function of the time domain offset gather; acquiring an amplitude spectrum of the autocorrelation function of the time domain offset gather; determining an effective quality factor according to the amplitude spectrum; and determining a depth domain quality factor according to the effective quality factor. Since the scheme first performs autocorrelation processing on the time domain offset gather and acquires an amplitude spectrum according to the processed autocorrelation function so as to eliminate the noise interference in the data and obtain a moreaccurate amplitude spectrum, and then determines an effective quality factor using the amplitude spectrum to determine a depth domain quality factor, thereby solving the technical problem of determining the depth domain quality factor with poor accuracy and low resolution in the existing methods.

Description

technical field [0001] The present application relates to the technical field of seismic exploration, in particular to a method and device for determining quality factors in depth domains. Background technique [0002] In seismic exploration, it is often necessary to use seismic data (such as seismic records, etc.) of a target area to perform migration imaging, so as to carry out specific seismic exploration of the target area according to the imaging results. [0003] When using seismic data for migration imaging, in order to reduce the error caused by the abnormal amplitude caused by the absorption and attenuation of seismic data, the corresponding depth domain quality factor (or QF quality factor, effective Q value) to measure the ratio of total energy to absorbed energy in seismic data, and then use the above-mentioned quality factor in the depth domain to perform pre-stack depth migration imaging, thereby reducing the impact of absorption attenuation. [0004] At prese...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/34G01V1/36
CPCG01V1/282G01V1/345G01V1/36G01V2210/51G01V2210/52G01V2210/74
Inventor 王磊梁兼栋张少华钱忠平薛红刚
Owner BC P INC CHINA NAT PETROLEUM CORP
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