A Method of Suppressing Harmonic Interference of Vibrator Sliding Sweep

A sliding scanning, harmonic interference technology, applied in seismic signal processing and other directions, can solve the problems of reducing the signal-to-noise ratio and large harmonic noise interference.

Active Publication Date: 2018-04-17
CHINA PETROCHEMICAL CORP +3
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Problems solved by technology

Sliding scanning is an important technology in current vibrator seismic exploration and acquisition technology. Since the excitation time of two adjacent shots is shortened, the sliding time of the two shots is shorter than the scanning length, which shortens the construction time and improves the construction efficiency. The impact is the harmonic interference noise of two adjacent shots. This kind of harmonic noise interference is relatively large, which has an important impact on seismic data and reduces the signal-to-noise ratio.

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  • A Method of Suppressing Harmonic Interference of Vibrator Sliding Sweep

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[0024] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0025] Such as figure 1 as shown, figure 1 It is a flow chart of the method for suppressing the harmonic interference of vibroseis slide scanning in the present invention.

[0026] In step 101, when the vibrator performs sliding scanning, a geophone is embedded near the vibrator to record vibration signals near the vibroseis. The method for recording the vibration signal of the ground surface requires a good coupling effect between the geophone and the ground surface, so as to record the vibration signal truly to the greatest extent. In one embodiment, a geophone is buried at a distance of 10 meters from the vibroseis. The geophone should be well coupled with the ground surface, and should be inserted tightly and buried firmly. figure 2 It is...

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Abstract

The present invention provides a novel method for suppressing the harmonic interference of the vibrator sliding scan, the novel method for suppressing the harmonic interference of the vibroseis sliding scan includes: Step 1, when the vibrator performs sliding scanning, the vibrator Embedding a geophone nearby to record the vibration signal; step 2, processing the vibration signal recorded by the geophone to obtain the first arrival wave; step 3, performing convolution operation on the first arrival wave and the reference signal, and calculating the surface vibration signal; and Step 4: Carry out correlation calculation between the surface vibration signal and the parent record, and obtain the sliding scan single-shot record. The new method for suppressing the harmonic interference of vibrator sliding scanning can obviously suppress the harmonic interference of sliding scanning, the signal-to-noise ratio is higher, the reflection information is clearer, and the signal-to-noise ratio of sliding scanning seismic data can be effectively improved.

Description

technical field [0001] The invention relates to a vibrator seismic acquisition technology, in particular to a method for suppressing the vibrator sliding scanning harmonic interference by using the surface vibration information recorded by a geophone near the vibrator. Background technique [0002] At present, vibrator seismic exploration and acquisition technology is the development trend of land seismic exploration and acquisition technology. Compared with explosive vibrator, vibroseis has many advantages such as controllable frequency and energy, safety and environmental protection, low cost, and high construction efficiency, so it is more and more popular in various fields. Sought after by big oil geophysical oil companies. Sliding scanning is an important technology in current vibrator seismic exploration and acquisition technology. Since the excitation time of two adjacent shots is shortened, the sliding time of the two shots is shorter than the scanning length, which ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
Inventor 段卫星刘斌宋智强陈吴金邸志欣徐雷良刘相如
Owner CHINA PETROCHEMICAL CORP
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