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Harmonic-wave removing method in multi-seismic-source seismic data processing

A seismic data and multi-source technology, applied in the field of petroleum exploration, can solve problems such as harmonic interference and low signal-to-noise ratio data, and achieve the effect of saving computation

Active Publication Date: 2016-01-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned difficult problems in the prior art, provide a method for removing harmonics in multi-source seismic data processing, and solve the problem of processing low signal-to-noise ratio data suffering from harmonic interference in multi-source seismic data question

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[0023] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0024] As an important high-efficiency acquisition method of vibrators, sliding scanning technology has been relatively mature and widely used. However, when the sliding scan method is used, since the previous scan has not ended, the next scan has already started, so the harmonics excited by the subsequent scan will pollute the records of the previous scans, and form harmonic interference to adjacent shots . Therefore, exploring efficient and feasible harmonic interference suppression technology is one of the key technologies for efficient vibroseis sliding scanning seismic data processing. In the present invention, the amplitude characteristics and distribution rules of harmonic interference are mainly used to perform channel switching and abnormal attenuation. Of course, the parameter test of the increment and attenuation of channel conversion requires different p...

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Abstract

The invention provides a harmonic-wave removing method in multi-seismic-source seismic data processing, and belongs to the field of oil exploration. The method comprises: (1) for multi-seismic-source single-shot data, each arrangement is taken as a unit, road rearrangement is performed according to a sort increment, and harmonic waves after the rearrangement are displayed on the data in random anomaly shape distribution; (2) regional anomaly attenuation testing and processing are performed on shot gather data after the rearrangement, and the harmonic waves in the random anomaly shape distribution are attenuated until being removed; and (3) the shot data obtained in the step (2) is recovered in anti-sorting manner according to a shot sequence and a road sequence, and the obtained shot gather data is shot gather data in which the harmonic waves are removed cleanly.

Description

technical field [0001] The invention belongs to the field of petroleum exploration, and in particular relates to a method for removing harmonics in multi-source seismic data processing, which is used for the processing of multi-source synchronous excitation (vibroseis synchronous scanning) seismic data in oil and gas exploration. Background technique [0002] Multi-source synchronous excitation seismic technology is to use conventional acquisition technology to collect multi-shot seismic records at the time of one-shot data collection. In order to reduce the time interval between adjacent earthquakes, multiple groups of seismic elements are used to alternately scan to reduce the relocation time, that is, alternate scanning. The improvement of collection efficiency is very obvious. But in a very short period of time, there are multiple seismic sources that are excited synchronously, and the mutual interference between the synchronous source signals is unavoidable. The first ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor 陈胜红佘德平武永山杨丽
Owner CHINA PETROLEUM & CHEM CORP
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