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Angle-domain inverse-scattering migration imaging method and device

A technology of migration imaging and inverse scattering, applied in the field of seismic exploration, can solve the problems of inaccurate selection of migration imaging value, inaccurate selection of integration range, inaccurate inversion solution, etc.

Active Publication Date: 2018-08-17
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] In view of this, the purpose of the embodiment of the present invention is to provide an angle-domain inverse scattering migration imaging method and device to solve the above-mentioned problems in the prior art that the selection of the integral range is not strict when calculating the illumination value at the imaging point during weighting. , the selected range is inaccurate when the offset imaging value is superimposed, which leads to the problem of inaccurate inversion solution

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  • Angle-domain inverse-scattering migration imaging method and device

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no. 1 example

[0027]The applicant's research found that the amplitude-preserving migration was first developed from the high-frequency approximate solution of the wave equation. On the basis of diffraction superposition, the true amplitude recovery of the reflection interface is realized by considering the geometric diffusion loss in compensation for ray propagation. In short, it is a weighted diffraction superposition migration. Miller et al. (1984, 1987) proposed the initial profile of true amplitude direct imaging and inversion—the weighted back-projection operator for solving the GRT (Generalized Radon Transform), which makes the diffraction superposition more perfect, and is more suitable for dealing with complex Geological structure and random arrangement of sources and receivers. Beylkin (1984, 1985) used the small perturbation technique and the Born approximation to linearize the inverse problem into an inverse scattering problem, introduced a Fourier integral operator and ignored a...

no. 2 example

[0063] In order to better realize the above angle-domain inverse scatter migration imaging method, the second embodiment of the present invention provides an angle-domain inverse scatter migration imaging device 100. For the specific structure, please refer to image 3 , image 3 A block diagram of an angle domain inverse scatter migration imaging device provided for the second embodiment of the present invention.

[0064] The angle domain inverse scatter migration imaging device 100 includes a first execution module 110 , a second execution module 120 , a third execution module 130 and a fourth execution module 140 .

[0065] The ray acquisition module 110 is configured to acquire seismic wave ray pairs starting from each shot point and arriving at each receiver point after passing through the first imaging point, wherein the first seismic wave ray from any shot point to the first imaging point and The second seismic wave ray from the first imaging point to the any detector ...

no. 3 example

[0071] In order to realize the above step counting method, the second embodiment of the present invention provides an angle domain inverse scatter migration imaging device 100 . Please refer to Figure 4 , Figure 4 A structural block diagram of an electronic device applicable to the embodiments of the present application is shown. The electronic device 200 may include an angle domain inverse scatter migration imaging device 200 , a memory 201 , a storage controller 202 , a processor 203 , a peripheral interface 204 , an input and output unit 205 , an audio unit 206 , and a display unit 207 .

[0072] The memory 201, storage controller 202, processor 203, peripheral interface 204, input and output unit 205, audio unit 206, and display unit 207 are electrically connected to each other directly or indirectly to realize data transmission or interact. For example, these components can be electrically connected to each other through one or more communication buses or signal line...

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Abstract

The invention, which relates to the technical field of seismic exploration, provides an angle-domain inverse-scattering migration imaging method and device. According to the method, a pair of seismicwave rays that passes through a first imaging point and arrives at each detection point by staring with each shot point is obtained; on the basis of the size of a scattering angle formed at the firstimaging point by the pair of seismic wave rays, the pair of seismic wave rays is divided into a corresponding angle interval; offset stacking is carried out on the pair of seismic wave rays in each angle interval to obtain an inversion value of a parameter combination of each angle interval; and then according to the inversion value of the parameter combination of each angle interval, inversion values of all perturbation parameters of the first imaging point are obtained. According to the angle-domain inverse-scattering migration imaging method and device, the parameter inversion problem is processed in the angle domain; the inaccurate illumination processing and unstable matrix inversion in a conventional offset frame are avoided; and thus the high-precision imaging and reliable parameterestimation are realized.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to an angle domain inverse scattering migration imaging method and device. Background technique [0002] With the development of society and economy, the number of automobiles continues to increase, and people's demand for energy such as natural gas and oil continues to increase. The importance of exploration for underground resources is self-evident. Among them, seismic exploration technology has been paid much attention as an important technology of geological exploration. Seismic exploration is the most important method in geophysical exploration and the most effective method to solve oil and gas exploration problems. It is an important means of surveying oil and natural gas resources before drilling, and is also widely used in coal field and engineering geological exploration, regional geological research and crustal research. Migration imaging is a key technology f...

Claims

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Application Information

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IPC IPC(8): G01V1/28
Inventor 毛伟建李武群梁全
Owner INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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