Surface Consistent Amplitude Compensation Method Based on Post-stack Reflected Wave Energy Statistics

A technology of energy statistics and amplitude compensation, which is applied in seismic signal processing and other directions, and can solve problems such as the difficulty of statistical compensation coefficients

Active Publication Date: 2015-09-02
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Application Information

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Problems solved by technology

There are many models for surface-consistent amplitude compensation, but all of them calculate the compensation coefficients on each shot set, each receiver point set, and each offset gather of the full survey line in the pre-stack gather. However, for earthquakes with low SNR According to the data, it is difficult to accurately count the compensation coefficients before the stack. Compared with the pre-stack reflection signal, the post-stack reflection event has a higher signal-to-noise ratio. Amplitude Compensation Method

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  • Surface Consistent Amplitude Compensation Method Based on Post-stack Reflected Wave Energy Statistics

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Embodiment Construction

[0029] The invention provides a method for surface consistent amplitude compensation of low signal-to-noise ratio seismic data, which uses the reflected wave energy statistics after multi-domain superposition of common shots, common detections, common offsets, etc. to obtain surface consistent amplitude compensation through iteration The factor, applied to pre-stack seismic records, can effectively eliminate the low signal-to-noise ratio and complex surface conditions. The amplitude is affected by the surface inconsistency. The method is simple, reliable and adaptable.

[0030] The realization principle of the present invention is as follows:

[0031] According to Taner’s basic idea of ​​surface consistency, A ij Is the amplitude spectrum of the seismic trace from the j-th receiver of the i-th shot, which can be expressed as the product of four components:

[0032] A ij =S i ·R j ·E k ·H l (1)

[0033] among them: k = i + j 2 , l = i - j

[0034] ...

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Abstract

The invention provides an earth surface consistency amplitude compensation method based on overlaid reflection wave energy statistics. An earth surface consistency amplitude compensation factor is acquired through iteration by using reflection wave energy statistics after multiple domains such as common shot, common receiver, common offset and the like are overlaid, influences imposed on the amplitude by earth surface inconstant factors under conditions of a low signal to noise ratio and a complex earth surface can be effectively eliminated by applying the earth surface consistency amplitude compensation factor to prestack seismic record. The method provided by the invention is easy to implement, reliable and strong in adaptability.

Description

Technical field [0001] The invention relates to seismic data processing technology, and is a method for compensating the surface consistency of seismic data based on multi-domain superimposed reflected wave energy statistics. Background technique [0002] The inconsistency of the surface is one of the important reasons for the degradation of seismic data in complex areas. Usually the difference in excitation conditions (including drug amount) and reception conditions will cause the reflected energy of each channel to be different. The purpose of surface consistency processing is to eliminate the influence of inconsistencies on the surface (including near-surface) on seismic records. The surface consistency amplitude compensation is to eliminate the energy change caused by the inconsistency of the surface. It is a relative amplitude maintaining amplitude compensation method. It is not necessary for some data such as ocean data, but it is necessary for seismic data in complex areas...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor陈海峰李向阳狄帮让魏建新蔡志光陈双全
OwnerCHINA UNIV OF PETROLEUM (BEIJING)