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Phase rotation method for improving phase consistency of different vibroseis data

A phase rotation and consistency technology, applied in the field of geophysical exploration data processing, can solve the problems of irregular alternation, inconsistency, and low data signal-to-noise ratio, and achieve good phase consistency.

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, to provide a phase rotation method with phase consistency of different seismic source data, to solve the problem of mixed construction with explosive seismic sources and vibrator sources, and the construction areas are alternately carried out irregularly, and the data information When the noise ratio is low, the phase inconsistency of seismic data caused by different methods of construction will improve the consistency of the processing results of the mixed source and improve the quality of the processing results

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  • Phase rotation method for improving phase consistency of different vibroseis data
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  • Phase rotation method for improving phase consistency of different vibroseis data

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0025] Due to the small number of vibrator shots, the construction area is not fixed, and it is a point-type blasting method. In each beam data, the vibrator is only used at the place where the construction of the explosive vibrator encounters obstacles. It is difficult to find a reliable event by superposition of seismic sources. Therefore, the present invention proposes to separate the single shots of the two kinds of seismic source data with good energy and frequency consistency, and take the single shot of the vibroseis data as a whole to extract the single shot and divide them into three step to achieve the phase consistency processing of the two source data, such as figure 1 Shown:

[0026] The first step is to pick out all the vibrator single-shot data as the vibrator data A (the vibrator single-shot data is the 3D data of the vibrator); The blasting method w...

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Abstract

The invention provides a phase rotation method for improving the phase consistency of different vibroseis data and belongs to the field of geophysical exploration data processing. The method comprises the following steps: first, all vibroseis single-shot data is picked out as controllable shot data A, and explosive single shots related to three-dimensional data of vibroseis are extracted out and are separated according to a common CMP gather to obtain an explosive vibroseis CMP gather B; second, common CMP domain-mixing separation superposition is carried out on the controllable shot data A and the explosive vibroseis CMP gather B directly to obtain the initial mixed superposition of two single-shot data; and third, differential phase rotation is carried out on the controllable shot data A, and separation superposition is respectively carried out on the controllable shot data A and the explosive vibroseis CMP gather B to obtain a corresponding stack section after each rotation, and the stack sections are screened to obtain the optimal rotation angle.

Description

technical field [0001] The invention belongs to the field of geophysical exploration data processing, and in particular relates to a phase rotation method for improving phase consistency of different seismic source data. Background technique [0002] The joint construction of different seismic sources is to solve the limitation of field construction conditions, and the combination of explosive seismic sources and vibrators is used to achieve the purpose of improving construction efficiency. However, due to the difference in seismic sources, there are great differences in the phase, energy, frequency and amplitude of the received data, which makes it difficult to achieve in-phase superposition of data obtained from mixed sources, which seriously affects the resolution and signal-to-noise ratio of the data. At present, the processing methods for seismic data of different sources at home and abroad mainly include: adjusting deconvolution parameter method, matched filter or seri...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
Inventor 陈胜红赵群张卫华薛诗桂
Owner CHINA PETROLEUM & CHEM CORP