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Method and device for storing pseudo-differential operator

A differential operator and storage method technology, applied in seismic signal processing and other directions, can solve the problem of large storage capacity of quasi-differential operators, and achieve the effect of reducing storage capacity and storage capacity.

Inactive Publication Date: 2019-01-15
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0009] The embodiment of the present invention provides a method for storing quasi-differential operators to solve the technical problem of large storage capacity of quasi-differential operators in the prior art

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  • Method and device for storing pseudo-differential operator

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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0025] The so-called quasi-differential operator is to bring the phase velocity formula of VTI or TTI into the coefficient matrix of the equation by solving the Kelvin-Christoffel eigenequation, so that the eigenproblem is established. The solution to the equation is the polarization direction corresponding to the phase velocity of the propagation direction. In order to comprehensively expound the analytical method of this problem, we first introduce the basic theory of anisotropy and start from the VTI (vertical anisotropy), HTI (transverse anisotropy) vector wave equations, and gradually expa...

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Abstract

An embodiment of the invention provides a method and device for storing a pseudo-differential operator. The method comprises: performing non-uniform sampling for a pseudo-differential operator corresponding to each spatial grid; storing sampling data corresponding to each pseudo-differential operator. The scheme can reduce the size of the quasi-differential operator without reducing the precisionof the differential operator, and store the sampling data corresponding to each quasi-differential operator, thereby realizing the reduction of the storage amount without reducing the precision of thedifferential operator, which is beneficial to reducing the storage amount in two-dimensional situations and to applying an algorithm for directly solving a Kelvin-Christoffel eigen equation to deal with three-dimensional problems.

Description

technical field [0001] The invention relates to the technical field of seismic data processing, in particular to a method and device for storing pseudo-differential operators. Background technique [0002] Different from the integral method or Gaussian beam migration imaging, the vector elastic wave field reverse time migration uses the full wave equation, which will not lose the detailed information of the seismic wave field, and has better imaging output for steep structures. Due to the use of multi-wave exploration methods, multi-wave exploration provides more angles of illumination for high-speed closed layers, water layers, etc., and has unique advantages compared to acoustic wave exploration. In the early years, due to lack of technology and cost constraints, the imaging conditions of traditional acoustic wave reverse time migration were often directly applied to multi-wave seismic data, and the horizontal and vertical components of the vector elastic wave field were d...

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Application Information

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IPC IPC(8): G01V1/32
CPCG01V1/32
Inventor 王建刘洪桂生冯海新
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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