An adaptive vibroseis sliding sweep harmonic suppression method
A technology of sliding scanning and harmonic suppression, applied in seismology, seismic signal processing, instruments, etc., can solve the problems of damaging effective waves, failing to identify the position of harmonic interference, reducing computational efficiency and denoising fidelity, etc. , to achieve the effect of improving speed and effect
Active Publication Date: 2021-07-16
中石化石油工程技术服务有限公司 +1
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Problems solved by technology
According to the characteristics of harmonic energy anomalies, the median filter can be used to suppress, but the median filter cannot identify the position of harmonic interference, and often needs to suppress the interference of the whole shot, which reduces the calculation efficiency and the fidelity of denoising, and Significant waves that can be harmful during denoising
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[0033] The present invention will be further described below in conjunction with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not as a limitation to the present invention.
[0034] Such as figure 1 As shown, an adaptive vibrator sliding scanning harmonic suppression method, the specific flow chart is as follows:
[0035] Step 101, according to the shot time sequence recorded by the SEGD track head, sort the sliding scan single shot records according to time;
[0036] Step 102, first define the observation system according to the SPS file provided in the field, and then according to the corresponding relationship between the file number and the SPS observation system, load the track head to obtain the shot point and receiver point coordinate information of each single shot;
[0037] Step 103, calculate the position of two adjacent shots, that is, the position of the n+1th shot and the n...
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The invention discloses an adaptive vibrator sliding scanning harmonic suppression method. According to the shooting time sequence recorded by the SEGD track head, the sliding scanning single shot records are sorted according to the shooting time sequence; the sliding scanning single shot record data is observed The system loads and obtains the shot point and receiver point coordinate information of each single shot record; calculates the position of the n+1th shot and the nth shot according to the shot point and receiver point coordinates and the time sequence of each single shot record; The n+1 shot appears at the position of the n shot to analyze the spatial range of the harmonic interference distribution, and calculate the radius r of the harmonic interference influence range; calculate the No. The influence range of the n+1 shot on the nth shot in time; the time-space variable frequency division median filter method is used to suppress the harmonics within the influence range of the n+1 shot’s harmonics. Compared with the prior art, the invention can greatly improve the speed and effect of harmonic suppression.
Description
technical field [0001] The invention relates to the field of vibrator sliding scanning for seismic exploration, in particular to an adaptive vibrator sliding scanning harmonic suppression method. Background technique [0002] With the emergence of vibrator seismic exploration, people have known harmonics very early. In the scanning method before the sliding scan, harmonic interference has little effect on data quality and can be ignored. Therefore, the development of harmonic suppression technology slow. In order to improve production efficiency, high-efficiency acquisition technologies such as sliding scanning have appeared. As people further investigate the acquisition speed, the sliding time is getting smaller and smaller, and the influence of harmonic interference is also increasing. Therefore, the technology of suppressing harmonic interference is constantly updated, especially In recent years, foreign countries have proposed a series of methods to suppress harmonic in...
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IPC IPC(8): G01V1/36
CPCG01V1/364
Inventor 莫延钢徐维秀冯玉萍段伟伟张媛胡慧光盛道显朱勇苏燕梁正洪
Owner 中石化石油工程技术服务有限公司