Method and device for predicting elastic wave velocity of strong transverse isotropic medium

By establishing a method based on elastic wave velocity model, using the rock attribute information of the target section of the reservoir, the problem of difficult prediction of elastic wave velocity in the prior art in the strong anisotropic medium is solved, and accurate wave velocity prediction under strong anisotropic conditions is achieved.

CN119667774AActive Publication Date: 2025-03-21CHINA NAT PETROLEUM CORP
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Patent Information

Application Number
CN202311209084.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-19
Publication Date
2025-03-21
Estimated Expiration
2043-09-19

AI Technical Summary

Technical Problem

The prior art is difficult to effectively characterize and predict elastic wave velocities in strong anisotropic media, especially when the assumption of weak anisotropy cannot be applied.

Method used

By establishing a method based on the elastic wave velocity model, using the rock attribute information of the reservoir target segment, including fracture weakness parameters, longitudinal and transverse wave velocity parameters, etc., an elastic wave velocity model suitable for strong anisotropy situation is constructed.

Benefits of technology

This method can accurately predict the seismic elastic wave velocity under strong anisotropy, and the results are better matched with the exact value, have a wider range of applications, and can effectively characterize the seismic wave velocity.

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Abstract

The invention discloses a strong transverse isotropic medium elastic wave velocity prediction method and device, and relates to the technical field of geophysical oil-gas exploration. And constructing an elastic wave velocity model by using the reservoir target section rock attribute information, and predicting the elastic wave velocity according to the elastic wave velocity model. The elastic wave velocity model with the fracture weakness as the independent variable is provided, the elastic wave velocity can be conveniently determined according to the fracture parameters, the method can be suitable for the high-anisotropy condition, and under the high-anisotropy condition, the seismic elastic wave velocity prediction result provided by the invention better coincides with the accurate value, and the application range is wider. In the process of establishing the elastic wave velocity model, the rock attribute information of the target section of the reservoir is fully utilized, the corresponding rock physical model is accurately constructed, and the corresponding reservoir rock and the properties of the fluid contained in the reservoir rock can be accurately determined according to the seismic response characteristics.
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