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A Joint Inversion Method of P- and S-wave Ray Parameter Domain

A ray parameter domain and joint inversion technology, applied in the field of seismic data interpretation, can solve the problems of lack of research and achieve high inversion accuracy

Active Publication Date: 2017-10-03
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The change information of P-wave and converted wave seismic amplitude with ray parameters is an important parameter in multi-wave seismic exploration. There is still a lack of similar research on the joint inversion of P-wave and converted wave seismic amplitude with ray parameters.

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  • A Joint Inversion Method of P- and S-wave Ray Parameter Domain

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[0056] Exemplary embodiments of the present invention will now be described in detail hereinafter; however, exemplary embodiments of the present invention may be embodied in many different forms and should not be limited to examples set forth herein. Rather, these examples are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0057] According to an exemplary embodiment of the present invention, the collected seismic data can be processed in advance, and then the processed seismic data can be input into, for example, a computer. For example, two-dimensional multi-component or three-dimensional multi-component field exploration acquisition can be performed by methods known in the art to obtain originally acquired multi-component data. Then, two-dimensional or three-dimensional compressional wave and converted wave seismic data are processed to obtain seismic data including compressional...

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Abstract

The present invention provides a joint inversion method of longitudinal and transverse waves in ray parameter domain. By converting the data of longitudinal and converted wave prestack gathers into the ray parameter domain, the elastic parameters of the formation are obtained by inversion of the information of the change of seismic amplitude with the ray parameters, and then Make predictions for lithology and fluids. The present invention is a joint inversion of physical properties at the same point. The longitudinal wave and the converted wave come from the same incident path. Although the reflection paths are separated from each other, they come from the same reflection point at the same depth, and the relationship between the parameters is closer, so more reliable data can be obtained. Formation elastic parameters, improve the accuracy of oil and gas prediction using P-wave and S-wave seismic data.

Description

technical field [0001] The invention belongs to the field of seismic data interpretation, and relates to a joint inversion method of longitudinal wave and converted shear wave seismic data. Background technique [0002] In oil and gas detection and reservoir description, the elastic parameters of the medium are very important, and these parameters are related to lithology and fluid composition. The three most important parameters describing elastic media are compressional wave velocity, shear wave velocity and density. The current conventional geophysical prospecting technique is to use the P-wave AVO (Amplitude Versus Offset, the amplitude varies with the offset) pre-stack gather to invert the above three parameters, and the factor of the P-wave reflection amplitude changing with the incident angle is considered during the inversion. However, a large number of theoretical studies and practical applications show that in the P-wave data with finite offset, there are certain ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 王延光王秀玲孟宪军余鹏王兴谋胡贤根
Owner CHINA PETROLEUM & CHEM CORP
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