Separation method for efficiently-collected multi-epicenter mixing data with multi-domain multi-time separation

A technology for efficient collection and mixing of data, applied in seismic signal processing and other directions, can solve the problems of poor data separation quality and poor results, and achieve the effect of improving quality

Inactive Publication Date: 2016-04-27
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] However, since the above process exploits the statistical properties of the effective signal to suppress aliasing noise, the poor quality of data separation for multi-source aliased data with low aliasing SNR leads to migration imaging using conventional methods. poor results

Method used

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  • Separation method for efficiently-collected multi-epicenter mixing data with multi-domain multi-time separation
  • Separation method for efficiently-collected multi-epicenter mixing data with multi-domain multi-time separation
  • Separation method for efficiently-collected multi-epicenter mixing data with multi-domain multi-time separation

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Embodiment 1

[0024] Such as figure 1 As shown, the multi-domain multi-separation high-efficiency acquisition and multi-source hybrid data separation method provided by the embodiment of the present invention includes:

[0025] Step 101, acquire time-domain aliased 2D shot records m.

[0026] Step 102, according to the 2D shot records m and the preset conversion function Ψ from the common shot gathers to the common central point gathers, obtain the aliased data at the common central point gather b.

[0027] Wherein, the process of obtaining the common center point gather b through step 102 includes: multiplying the two-dimensional shot record m by the conversion function Ψ to obtain the common center point gather b of the aliasing data.

[0028] That is, the gather b=Ψm of the aliased data at the common center point, formula 1

[0029] Step 103, according to the preset consistency filter П and the aliasing data, the separated effective signal S and the separated adjacent shot interference...

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Abstract

The invention discloses a separation method for efficiently-collected multi-epicenter mixing data with multi-domain multi-time separation, relates to the field of geophysics, and aims at solving the problem that low separation quality in the prior art causes unsatisfied offset imaging results when a routine method is used. The data separation method comprises that a time domain aliased 2D shot record m is obtained; a central point shared gather b of aliased data is obtained; a separated effective signal S and separated adjacent shot interference N are obtained; a separated effective signal S' after gather conversion and separated adjacent shot interference N' after gather conversion are obtained; an effective signal NS leaked from the separated adjacent shot interference, adjacent shot interference NN purified from the separated adjacent shot interference, an effective signal SS purified from the separated effective signal and residual adjacent shot interference SN in the separated effective signal are obtained; and recombination is carried out correspondingly to generate a final separated effective signal S1 and final separated adjacent shot interference N1.

Description

technical field [0001] The invention relates to the field of geophysics, in particular to a multi-domain multi-separation high-efficiency acquisition multi-source mixed data separation method. Background technique [0002] At present, the separation method of multi-source mixed data collected in large-scale industrial applications in China is mainly to filter and denoise the common offset gathers of pseudo-separated gathers to obtain separated data. [0003] However, since the above process exploits the statistical properties of the effective signal to suppress aliasing noise, the poor quality of data separation for multi-source aliased data with low aliased SNR leads to migration imaging using conventional methods. results are poor. Contents of the invention [0004] The invention provides a multi-domain multi-separation high-efficiency acquisition multi-source mixed data separation method, which can remove the influence of aliasing noise and improve the quality of data ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 王一博武绍江张乐乐常旭
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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