An Anisotropic Parameter Inversion Method Based on Transmission Equation

An anisotropic and parametric inversion technology, applied in the field of geophysical inversion, can solve the problems that the accuracy of velocity analysis cannot meet the needs of the method, the influence of anisotropic parameters of transfer errors, and the multiple errors of picking up residual time difference, etc., and reach the range of input data. Controllable, high signal-to-noise ratio and high stability
CN105487110BActive Publication Date: 2018-05-04CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2018-05-04

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Abstract

The invention provides an anisotropic parameter inversion method based on a transmission equation, which belongs to the field of geophysical inversion. The method includes: (1) selecting post-stack seismic data volumes corresponding to any three different azimuth angles, calculating the reflection coefficients corresponding to the three different azimuth angles through sparse pulse inversion method; (2) calculating three different azimuth angles respectively. The transmission coefficient corresponding to the reflection coefficient of the azimuth angle (3) analyze the pre-stack azimuth gather to obtain the incident angle information, the incident angle information includes the maximum incident angle i2, the minimum incident angle i1 and the interval; (4) use the azimuth information transmission coefficient The information is calculated to obtain the anisotropy parameters Δε(V) and Δδ(V).
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Description

technical field

[0001] The invention belongs to the field of geophysical inversion, and in particular relates to an anisotropic parameter inversion method based on a transmission equation. Background technique

[0002] Anisotropy parameters play a pivotal role in the quantitative prediction of fractures, but because the order of magnitude of anisotropy parameters is much smaller than that of seismic data, its calculation has brought great difficulties. At present, the calculation of anisotropy parameters is mainly based on prestack azimuth gathers, which are mainly divided into the following three types of channels: 1. According to the velocity information that changes with the seismic azimuth, the accuracy of velocity analysis is difficult to meet the needs of the method; 2. According to the velocity information that varies with the seismic azimuth The remaining time difference information, there are many errors when picking up the remaining time difference; 3. Based on the...

Claims

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