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Longitudinal and transverse wave ray parameter domain joint inversion method

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

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] 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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  • Longitudinal and transverse wave ray parameter domain joint inversion method
  • Longitudinal and transverse wave ray parameter domain joint inversion method
  • Longitudinal and transverse wave ray parameter domain joint inversion method

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Embodiment Construction

[0059] 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.

[0060] 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 invention provides a longitudinal and transverse wave ray parameter domain joint inversion method. According to the method, longitudinal wave and converted wave prestack gather data are converted and placed in a ray parameter domain, and a formation elastic parameter is obtained by carrying out inversion on change information of ray parameters along with seismic amplitude, so that lithology and fluids are predicted. The method adopts joint inversion of properties at the same point; longitudinal wave and converted wave come from the same incident path; although the reflected paths of the longitudinal wave and the converted wave are separated from each other, the reflected paths have the same depth and come from the same reflection point; the connection among parameters are closer, so that a more reliable formation elastic parameter can be obtained, and the accuracy of gas prediction by using the longitudinal and transverse wave seismic data is improved.

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 technology for geophysical exploration is to use longitudinal wave AVO [0003] (Amplitude Versus Offset, the amplitude varies with the offset) The above three parameters are inverted by the prestack gather, and the factor of the variation of the compressional wave reflection amplitude with the incident angle is considered during the inversion. However, a large number of theoretical studies and practical applications show that in the...

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Application Information

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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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