A Method of Suppressing Harmonic Interference of Vibrator Sliding Sweep

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 ...

AI Technical Summary

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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