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Vibroseis harmonic wave suppressing method based on predictive filtering method and pure phase shifting method

A technology of predictive filtering and harmonic suppression, applied in seismic signal processing and other directions, can solve problems such as unsatisfactory effects, interference, and impact on application effects.

Inactive Publication Date: 2016-01-27
中石化石油工程地球物理有限公司胜利分公司
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Problems solved by technology

[0002] Harmonic suppression using the traditional harmonic suppression method is not ideal, because the harmonic interference in actual data processing includes two parts: one is the interference from the gun itself, and the other is from other guns (especially the next one). First Arrival of the Cannon) Disturbance
Ground force signal filtering assumes that the input shot record does not have internal shot harmonic interference, so the existence of the shot’s own harmonic interference will definitely affect the application effect of the method

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  • Vibroseis harmonic wave suppressing method based on predictive filtering method and pure phase shifting method
  • Vibroseis harmonic wave suppressing method based on predictive filtering method and pure phase shifting method
  • Vibroseis harmonic wave suppressing method based on predictive filtering method and pure phase shifting method

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Embodiment Construction

[0045] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0046] Based on the theoretical research on harmonics by seriff and Li et al., taking the linear up-sweep signal as an example, the reference signal is defined as follows:

[0047] the s k (t)=a k · sin[2πkf(t)t]

[0048] In the formula (1): t is the scan time; k is a positive integer, representing the harmonic order; a k (t) is the amplitude of each harmonic, f(t) represents the scanning frequency

[0049] f ( t ) = f L + f H - f L 2 T t

[005...

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Abstract

The present invention provides a vibroseis harmonic wave suppressing method based on a predictive filtering method and a pure phase shifting method. The method comprises a first step of inputting cross-correlation seismic records and corresponding ground force signals after pure phase shifting treatment; a second step of applying the pure phase shifting method to suppress harmonic interferences of a local blast; a third step of applying the predictive filtering method to suppress harmonic interferences of an adjacent blast; and a fourth step of acquiring vibroseis scanning data after the whole continuous harmonic interference suppression. With adoption of the vibroseis harmonic wave suppressing method provided by the present invention, interfering noises from adjacent blasts can be well suppressed, harmonic interferences inside a blast can also be partially removed, and a harmonic wave suppressing method of vibroseis mass seismic data is realized.

Description

technical field [0001] The invention relates to the field of seismic data processing, in particular to a vibrator harmonic suppression method based on a predictive filtering method and a pure phase shift method. Background technique [0002] Harmonic suppression using the traditional harmonic suppression method is not ideal, because the harmonic interference in actual data processing includes two parts: one is the interference from the gun itself, and the other is from other guns (especially the next one). the first arrival of the cannon). Ground force signal filtering assumes that the input shot record does not have internal shot harmonic interference, so the existence of the shot's own harmonic interference will definitely affect the application effect of the method. For this reason, we invented a new vibrator harmonic suppression method based on predictive filtering method and pure phase shift method, which solved the above technical problems. Contents of the invention...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
Inventor 魏福吉李振春于富文宋俊海崔汝国赵国勇莫延钢付大志
Owner 中石化石油工程地球物理有限公司胜利分公司
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