Inversion dynamic correction method, device and storage medium based on unsteady seismic data
A seismic data and dynamic correction technology, applied in seismology, measurement devices, seismic signal processing, etc., can solve the problems of weak amplitude energy of deep wavelets, poor stability, and unstable amplitude compensation values of inverse Q filtering. Achieve the effect of benefiting AVO analysis and stacking, improving seismic section resolution, and avoiding tensile distortion
Active Publication Date: 2020-08-04
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology
In order to realize the compensation for the absorption and attenuation of seismic waves, many scholars at home and abroad have done a lot of research work in this area, and performed inverse Q filter compensation on pre-stack or post-stack seismic records. Stability problem, and this problem has not been solved in essence, so that the dynamic correction result will still be affected by the absorption attenuation, resulting in inconsistent waveforms of far and near offset wavelets, weak amplitude energy of deep wavelets, and low dominant frequency. Get High Quality Corner Gathers
[0007] The inventors of the present application found that these methods cannot fundamentally eliminate the influence of dynamic correction on wavelet stretching, are difficult to apply in actual processing, and have poor stability, and none of the methods consider the influence of formation absorption and attenuation, which cannot effectively deal with Unsteady Seismic Data
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[0059] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described The embodiments are only some of the embodiments in this specification, not all of them. Based on the embodiments in this specification, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.
[0060] refer to figure 1 As shown, the inversion dynamic correction method based on unsteady seismic data in the embodiment of this specification may include the following steps:
[0061] S101. Extract seismic wavelets from acquired single-shot seismic data.
[0062] Because the underground structure is complex and incompletely elastic, the amplitude and phas...
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Embodiments of the invention provide an unsteady-state seismic data-based dynamic inversion correction method and device and a storage medium. The method comprises the steps of extracting a seismic wavelet from obtained single-shot seismic data; converting the seismic wavelet into a time-varying seismic wavelet according to a preset absorptive attenuation filter; carrying out l2, 1 norm inversionon a seismic record according to a dynamic inversion correction operator constructed by the time-varying seismic wavelet so as to obtain a reflection coefficient after the dynamic correction; and carrying out convolution on the seismic wavelet and the reflection coefficient after the dynamic correction so as to obtain seismic data after the dynamic correction. According to the method, the waveletstretching phenomenon in the dynamic correction of the unsteady-state seismic data can be decreased or avoided.
Description
technical field [0001] This description relates to the technical field, in particular to a dynamic correction method, device and storage medium for inversion based on unsteady seismic data. Background technique [0002] In seismic exploration, seismic data processing with high fidelity, high resolution and high signal-to-noise ratio is an important basis and guarantee for seismic data interpretation and oil and gas reservoir prediction. With the increasing degree of oil and gas exploration, using existing data to maximize the use of oil and gas resources that have been developed or will be developed is a key issue that needs to be solved in geophysical exploration. To solve this problem, it is necessary to choose a more targeted method for seismic data processing to obtain processing results with higher resolution, so as to simulate subsurface characteristics more accurately and facilitate further interpretation work. [0003] In seismic data processing, the purpose of dyna...
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IPC IPC(8): G01V1/36
CPCG01V1/362G01V1/366
Inventor 袁三一王迪余子昭桑文镜王尚旭
Owner CHINA UNIV OF PETROLEUM (BEIJING)