Reservoir non-isotropy detection method and equipment based on gradient structure tensor

A gradient structure, heterogeneous technology, applied in the field of oil and gas exploration, can solve the problems that affect the judgment of interpreters, the difference between the fault/fracture and the surrounding background is low, and the fault/fracture description is not clear enough, etc., to achieve the effect of discontinuity sensitivity

Inactive Publication Date: 2014-05-14
PETROCHINA CO LTD
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Problems solved by technology

The anti-noise performance of coherence and curvature attributes is not good, and they are susceptible to noise pollution. Therefore, there are often situations where the difference between faults / fractures and the surrounding background is too low. / The depiction of fractures is often not clear enough, and even affects the interpreter's judgment on fault interpretation

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  • Reservoir non-isotropy detection method and equipment based on gradient structure tensor
  • Reservoir non-isotropy detection method and equipment based on gradient structure tensor
  • Reservoir non-isotropy detection method and equipment based on gradient structure tensor

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[0024] 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.

[0025] A method for reservoir heterogeneity detection based on gradient structure tensor proposed by the present invention, figure 1 For the specific flow chart of this method, by figure 1 As can be seen, the method includes:

[0026] S101: Collect seismic data. In particular embodiments, conventional seismic survey methods may be used to acquire seismic data.

[0027] S102: Perform conventional processing on the seismic data to obtain post-stack seismic da...

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Abstract

The invention provides a reservoir non-isotropy detection method and equipment based on a gradient structure tensor. The method comprises the steps that seismic data are collected; the seismic data are processed conventionally, and post-stack seismic data are obtained; the gradient structure tensor is built according to the post-stack seismic data; a confidence coefficient is built according to the gradient structure tensor; reservoir predication is carried out according to the confidence coefficient. The reservoir non-isotropy detection method and equipment based on the gradient structure tensor use the analysis technology of the gradient structure tensor, builds the confidence coefficient according to the partial geometrical characteristics of seismic data, and describes the discontinuous boundary of an image, thereby achieving the purposes of identifying faults, fissures, karst caves, watercourses and other target geologic bodies.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to the detection technology of post-stack seismic data, specifically a method and equipment for reservoir heterogeneity detection based on gradient structure tensor. Background technique [0002] With the continuous development of seismic data acquisition technology, high-quality seismic data with high density, large offset, and wide azimuth has greatly improved the resolution and accuracy of exploration results, enabling us to identify underground More subtle differences caused by residual oil. Therefore, on the basis of accurate structural imaging, new technical means are needed to describe the heterogeneity of the subsurface medium in more detail, so as to obtain a more realistic geological and geophysical understanding, and assist the research work in the exploration stage of lithologic oil and gas reservoirs. [0003] Faults, fractures, caves, channels, sand bo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 王恩利杨午阳周春雷李琳杨庆鄢高韩谢春辉李三家魏新建禄娟
Owner PETROCHINA CO LTD
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