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High-precision converted wave anisotropy stacking velocity analysis method

An anisotropic and superimposed velocity technology, applied in the field of oil and gas seismic exploration and investigation, can solve problems such as unreasonable calculation, and achieve the effect of improving imaging accuracy

Active Publication Date: 2012-10-10
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] This method is not a good approximation, and the calculation is obviously unreasonable in the limit of large offsets

Method used

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  • High-precision converted wave anisotropy stacking velocity analysis method
  • High-precision converted wave anisotropy stacking velocity analysis method
  • High-precision converted wave anisotropy stacking velocity analysis method

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Embodiment Construction

[0020] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0021] figure 1 A flow chart showing a high-precision converted wave anisotropy superposition velocity analysis method according to an exemplary embodiment of the present invention. However, the invention is not limited to the embodiments shown in the drawings, but can be implemented in other different ways. In the method of the present invention, one or more steps may be omitted or repeated, or these steps may be performed in a different order.

[0022] An embodiment of the present invention provides a high-precision converted wave anisotropic superposition velocity analysis method, which can use formula 1 to calculate the travel time of the converted wave,

[0023] T ps = ( V s ...

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Abstract

The invention discloses a high-precision converted wave anisotropy stacking velocity analysis method. According to the method, the travel time of a converted wave is calculated through an equation, wherein the Tps is the travel time of the converted wave, the Vp is the velocity of a longitudinal wave, the Vs is the shear wave velocity, FORMULA is self-exciting and self-receiving, the Dp is the half offset distance of the longitudinal wave, the Ds is the half offset distance of a shear wave, FORMULA is an anisotropy parameter of the longitudinal wave, and FORMULA is an anisotropy parameter of the shear wave. The method comprises the following steps of: according to the longitudinal wave velocity parameter Vp, performing constant velocity scanning to obtain the shear wave velocity Vs through using a formula 1; according to the longitudinal wave velocity parameter Vp and the obtained shear wave velocity Vs, performing the constant velocity scanning to obtain the anisotropy parameter of the longitudinal wave through using the formula 1; and according to the longitudinal wave velocity parameter Vp, the obtained shear wave velocity Vs and the obtained anisotropy parameter of the longitudinal wave, performing the constant velocity scanning so as to obtain the anisotropy parameter of the shear wave through using the formula 1.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas seismic exploration and investigation. Specifically, the invention relates to an analysis method of converted wave anisotropy stacking velocity, which is mainly used in field seismic data processing and interpretation of petroleum seismic exploration. Background technique [0002] Velocity analysis has become the core of seismic data processing since the emergence of multiple overlay and stacking techniques in the 1960s. In the early stage of seismic exploration, when the geological structure is relatively simple, the stacking velocity analysis technology based on the hyperbolic time-distance equation assumed by the theory of horizontal layered media can meet the requirements. With the increasing complexity of the exploration area and the gradual maturity of the converted wave imaging method, the velocity analysis technology of the converted wave anisotropic medium is proposed. The core l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
Inventor 罗红明李忠何光明陈爱萍王栋陈三平刘奇琳张华
Owner BC P INC CHINA NAT PETROLEUM CORP
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