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Reverse-time migration imaging method and device

A technology of reverse time migration imaging and acoustic wave equation, applied in the field of petroleum exploration seismic data processing, can solve problems such as large computational workload, and achieve the effect of reducing computational workload

Active Publication Date: 2016-03-16
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0007] In the prior art, the pseudospectral method is used to perform reverse time migration processing on seismic data. This method needs to perform Fourier transform and inverse transform on the seismic wave field in multiple time steps, which may lead to a relatively large computational workload.

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Embodiment Construction

[0062] Embodiments of the present application provide a reverse time migration imaging method and device.

[0063] 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.

[0064] The reverse time migration imaging method described in this application will be described in detail below with reference to the accompanying drawings. Although the present application provides the operation steps of the method...

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Abstract

The embodiment of the application discloses a reverse-time migration imaging method and device. The reverse-time migration imaging method comprises the steps that a mapping relation between theoretical angular frequency corresponding to the seismic wave field of a target area and numerically calculated angular frequency is constructed; first seismic data spectrum corresponding to the theoretical angular frequency is mapped into second seismic data spectrum corresponding to the numerically calculated angular frequency by utilizing the mapping relation; and reverse-time migration processing is performed on the second seismic data spectrum after mapping so that a migration image is obtained. With application of the reverse-time migration imaging method and device, the phenomenon of numerical dispersion generated in seismic data imaging can be effectively avoided so that the computational effort can be reduced.

Description

technical field [0001] The present application relates to the technical field of petroleum exploration seismic data processing, in particular to a reverse time migration imaging method and device. Background technique [0002] Seismic migration imaging is a very important step in seismic data processing, which mainly obtains the migration image of seismic data in the depth domain by performing migration processing on seismic data. The quality of the migration image may directly affect the subsequent seismic and geological interpretation, thus affecting the identification of oil and gas reservoirs. [0003] Reverse time migration technology is a migration method suitable for structural imaging in complex regions, which can accurately image high and steep structures. The reverse time migration technology mainly uses the wave field simulation algorithm to simulate the seismic wave field, and then performs reverse time migration processing on the simulated seismic wave field to...

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Application Information

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IPC IPC(8): G01V1/34
CPCG01V1/345G01V2210/48G01V2210/74
Inventor 武威戴南浔李文卉王东刘磊吴晓丰
Owner BC P INC CHINA NAT PETROLEUM CORP
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