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Earth surface consistency amplitude compensation method based on overlaid reflection wave energy statistics

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

Active Publication Date: 2014-03-19
CHINA UNIV OF PETROLEUM (BEIJING)
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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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  • Earth surface consistency amplitude compensation method based on overlaid reflection wave energy statistics
  • Earth surface consistency amplitude compensation method based on overlaid reflection wave energy statistics
  • Earth surface consistency amplitude compensation method based on overlaid reflection wave energy statistics

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Embodiment Construction

[0029] The present invention provides a surface consistent amplitude compensation method for low signal-to-noise ratio seismic data, which utilizes reflection wave energy statistics after multi-domain stacking such as common shot, common detection, common offset, etc., and obtains surface consistent amplitude compensation through iteration The factor, applied to pre-stack seismic records, can effectively eliminate the influence of amplitudes by surface inconsistencies under the conditions of low signal-to-noise ratio and complex surface. The method is simple, reliable and adaptable.

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

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

[0032] A ij = S i · R j ·E k ·H l (1)

[0033] in: k ...

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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 a seismic data processing technology, which is a surface consistent amplitude compensation method for seismic data based on multi-domain stacked reflected wave energy statistics. Background technique [0002] The inconsistency of the surface is one of the important reasons for the quality reduction of seismic data in complex areas. Usually, the difference in excitation conditions (including dose) and receiving conditions will lead to different reflection energies. The purpose of surface consistency treatment is to eliminate the impact of surface (including near-surface) inconsistency on seismic records. The surface consistent amplitude compensation is to eliminate the energy change caused by the inconsistency of the surface. It is a relative amplitude compensation method. It is not necessary for some data such as ocean data, but it must be done for seismic data in complex areas. Surface-consistent amplitude compensation is an ...

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Application Information

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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
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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