A pre-stack seismic inversion method and device

A pre-stack seismic and seismic wave reflection technology, applied in the field of seismic exploration, can solve problems such as low accuracy of seismic wave reflection coefficient, low accuracy of P-wave velocity, shear-wave velocity and density at the target layer, and deviation of inversion results, etc.

Active Publication Date: 2018-11-02
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] The inventors found that there are at least the following problems in the prior art: for pre-stack seismic data with a longitudinal wave incidence angle greater than 30 degrees, the accuracy of the seismic wave reflection coefficient obtained based on the Zoeppritz approximation formula is low, which may lead to inconsistencies in the final inversion results. Large deviation, that is, the accuracy of obtaining the P-wave velocity, S-wave velocity and density of the target layer in the target work area is low

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  • A pre-stack seismic inversion method and device

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Embodiment Construction

[0068] Embodiments of the present application provide a pre-stack seismic inversion method and device.

[0069] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0070] figure 1 It is a flowchart of an embodiment of a pre-stack seismic inversion method of the present application. Such as figure 1 As shown, the pre-stack seismic inversion method includes the following steps.

[0071] Step S1...

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Abstract

The embodiment of the application discloses a prestack seismic inversion method and device. The method comprises the following steps: obtaining prestack seismic data and logging data of a target work area; determining initial forward seismic data of the target work area based on the prestack seismic data and the logging data; determining an error function term based on the prestack seismic data and the initial forward seismic data; constructing an inversion objective function of the target work area based on the error function term and a first feature item, a second feature item, and a third feature item associated with changes of elastic parameters of the target work area; determining target values of the elastic parameters of the target work area based on the inversion objective function. By adopting the prestack seismic inversion method and device, the accuracy of inversion results obtained by a prestack seismic inversion can be improved.

Description

technical field [0001] The present application relates to the technical field of seismic exploration, in particular to a pre-stack seismic inversion method and device. Background technique [0002] The seismic wave data received on the surface from the same reflection point underground are superimposed after motion correction, and the superimposed seismic wave data can be called post-stack seismic data. The seismic wave data before stacking can be called pre-stack seismic data. Compared with post-stack seismic data, pre-stack seismic data retain more subsurface geological information. For example, information related to compressional wave velocity, shear wave velocity, or density at a formation location in a reservoir. For this reason, the pre-stack AVO (Amplitude Versus Offset, amplitude variation with offset) inversion based on pre-stack seismic data can provide the P-wave velocity, S-wave velocity or density of the target layer in the reservoir, and its inversion accura...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28G01V2210/6169
Inventor 陈双全李向阳支丽霞宋宝山
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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