Shallow superposition modeling-based transverse wave static correction method and device
A technology of static correction and static correction, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of limited investigation depth, low accuracy of shear wave surface survey method, and high cost of shear wave surface survey
Pending Publication Date: 2021-02-23
BC P INC CHINA NAT PETROLEUM CORP +1
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[0003] This application provides a shear wave static correction method and device based on shallow superimposed modeling, to at least solve the problem of low accuracy of shear wave surface survey methods, limited survey depth, and high cost of shear wave surface surveys. Problems affecting the accuracy of shear wave model and shear wave static correction
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[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0047] At present, the problem of shear wave static correction is usually solved by shear wave first arrival inversion technology and shear wave surface survey technology. However, shear wave exploration basically uses a shear wave vibroseis to excite seismic shear waves. Due to the influence of surface conditions and shear wave source machinery, the quality of the first arrival of shear waves is not high, and it is difficult to pick up effectively; Shear-wave...
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The invention provides a shallow superposition modeling-based transverse wave static correction method and device. The method comprises the steps of selecting a shallow superposition reflection eventon a transverse wave seismic superposition profile, and obtaining a plurality of shallow superposition acceleration control points according to the shallow superposition reflection event; reading basic data of the shallow stacking acceleration control points, wherein the basic data comprises stacking speed and reflection two-way travel time; calculating the surface layer average speed, thickness and maximum speed of the transverse wave shallow control points according to the basic data; constructing a transverse wave model through the transverse wave shallow control points, and calculating thestatic correction value of transverse waves. The method is suitable for a transverse wave seismic exploration project, the static correction value of the transverse wave is rapidly and directly calculated based on shallow superposition modeling, the method is simple and effective, dependence on transverse wave first arrival and transverse wave surface layer investigation is reduced, and the exploration cost is reduced.
Description
technical field [0001] The application belongs to the technical field of seismic data processing, and in particular, relates to a shear wave static correction method and device based on shallow layer superposition modeling. Background technique [0002] The Qaidam Basin is an important gas source area for natural gas exploration in western China. With the deepening of exploration, the imaging accuracy of conventional P-wave exploration is limited in the gas cloud area, and the use of S-wave exploration technology to reveal the regularity of natural gas reservoirs has become another means. Compared with longitudinal waves, shear waves have a lower velocity. Due to the influence of surface conditions, the problem of shear wave static correction is more serious. The change of shear wave surface velocity is difficult to control, and the time shift caused by shear wave static correction is larger. At present, the problem of shear wave static correction is usually solved by shear...
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IPC IPC(8): G01V1/36
CPCG01V1/362G01V2210/53
Inventor 王海立宁红晓于宝华马立新栗美华王红博
Owner BC P INC CHINA NAT PETROLEUM CORP