Noise suppression method, device and equipment for vibroseis, and storage medium

A technology of noise suppression and seismic source, which is applied in the field of exploration, can solve the problem of not being able to restore the effective signal well, and achieve the effect of effective suppression, improving the signal-to-noise ratio of the data, and strengthening the effective signal

Pending Publication Date: 2022-02-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for the strong energy scattering noise caused by continuous vibration, there is no good way to suppress it
Existing processing methods use filtering methods, correlation methods, model methods, statistical methods, etc. to suppress the noise based on the amplitude energy difference, time-frequency relationship, and correlation. However, when suppressing the noise in the black triangle area, it cannot recover well. valid signal

Method used

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  • Noise suppression method, device and equipment for vibroseis, and storage medium
  • Noise suppression method, device and equipment for vibroseis, and storage medium
  • Noise suppression method, device and equipment for vibroseis, and storage medium

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Embodiment 1

[0063] In order to solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention provides a method for suppressing noise of a vibroseis.

[0064] figure 1 It is a flow chart of an embodiment of the noise suppression method of the vibroseis in the present invention, such as figure 1 As shown, the noise suppression method of the vibroseis in this embodiment may specifically include the following steps:

[0065] 100. Taking the current suppressed channel as the center, establish a five-dimensional offset vector tile (Offset Vector Tile, OVT) gather corresponding to the current suppressed channel;

[0066] In this embodiment, the five-dimensional OVT gather includes dimensions including offset, azimuth, common depth point (Common DepthPoint, CDP), CDP line and time.

[0067] In a specific implementation process, for the common shot point gather, each seismic trace is placed in the CDP grid (CDP bin) according to the position of th...

Embodiment 2

[0142] This embodiment illustrates the technical solution of the present invention with specific examples. Wherein, in this embodiment, for vibroseis acquisition in the northwest desert area in China, the technical solution of the present invention can effectively suppress the black triangle noise and better restore the effective signal in the black triangle area. image 3 It is a comparison chart of CMP gather records before and after noise suppression in a certain area in Northwest China. Figure 4 It is the enlarged display comparison chart of CMP gathers before and after noise suppression in a certain area in Northwest China. Figure 5 It is a comparison chart of the spectrum inside and outside the black triangle after noise suppression in a certain area in Northwest China. Image 6 It is a comparison map of seismic stacked sections before and after noise suppression in a certain area in Northwest China; Figure 7 It is a comparison map of enlarged and displayed seismic ...

Embodiment 3

[0145] In order to solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention also provides a noise suppression device for a vibrator.

[0146] Figure 8 It is a structural schematic diagram of an embodiment of the noise suppression device of the vibrator of the present invention, as Figure 8As shown, the noise suppression device of the vibroseis in this embodiment includes a building module 80 , an analysis module 81 , a superposition module 82 and a noise suppression module 83 .

[0147] Establishing module 80, for centering on the current denoised channel, establishing a five-dimensional offset vector slice OVT gather corresponding to the current denoised channel;

[0148] In this embodiment, the five-dimensional OVT gather includes dimensions including offset, azimuth, common depth point CDP, CDP line and time;

[0149] Build module 80, specifically for:

[0150] Taking the current suppressed channel as the center, se...

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Abstract

The invention discloses a noise suppression method, device and equipment for a vibroseis and a storage medium, and the method comprises the steps: taking a current pressed noise channel as a center, and building a five-dimensional offset vector piece OVT channel set corresponding to the current pressed noise channel; analyzing the five-dimensional spectrum of the five-dimensional OVT gather to obtain an apparent inclination angle of the five-dimensional OVT gather; superposing the five-dimensional OVT gather along the apparent dip angle to obtain a noise suppression model channel; and carrying out noise suppression on the initial domain seismic data corresponding to the noise suppression model channel by utilizing conversion among different domains to obtain target seismic data corresponding to the vibroseis, thereby realizing effective suppression of the noise in the black triangular region and better recovering effective signals, enhancing the effective signals outside the black triangular region and improving the signal-to-noise ratio of the data.

Description

technical field [0001] The invention belongs to the technical field of exploration, and in particular relates to a noise suppression method, device, equipment and storage medium of a vibrator. Background technique [0002] Vibroseis acquisition inevitably produces noise such as source mechanical interference, harmonic interference, and scattering interference. Especially the mechanical interference of the source and the scattering interference seriously reduce the signal-to-noise ratio of the data, especially for the ultra-deep exploration with thicker sand layers on the surface, it is more difficult to achieve the exploration target. There are two main reasons for the noise of the vibrator: one is the interference caused by the nonlinearity of the vibrator mechanical device, the vibration device and the hydraulic servo system; the other is the harmonic generated by the coupling effect between the vibration plate and the ground interference. Harmonic and strong scattering ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/32
Inventor 杜杨杨李洪建
Owner CHINA PETROLEUM & CHEM CORP
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