Method and device for adjusting amplitude of seismic data
An amplitude adjustment, seismic data technology, applied in the field of geological exploration, can solve the problems of poor seismic data effect, too large amplitude energy difference of seismic information, no solution proposed, etc., to achieve the effect of consistent energy
Active Publication Date: 2019-02-15
PETROCHINA CO LTD
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However, when using the above method, due to the large difference in the amplitude energy of the original seismic information within each block and between each block, and the weak energy of the far and near offsets, the effect of the adjusted seismic data is poor
[0004]
For the above problems, no effective solution has been proposed
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[0037] In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of this application.
[0038]Considering the problem of uneven distribution of signal energy caused by different offset changes in each seismic gather in the prior art, the dynamic correction stretch removal process can remove the noise signal caused by the offset change in the gather to be measured , the inventors proposed a method of combining d...
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The invention provides a seismic data amplitude adjusting method and a seismic data amplitude adjusting device. The seismic data amplitude adjusting method comprises steps that a signal-to-noise ratio of a to-be-detected channel set is acquired; the correcting stretching cutting processing of the to-be-detected channel set is carried out, and the cutting time points of the various seismic channels of the to-be-detected channel set are determined; according to the cutting time points of the various seismic channels of the to-be-detected channel set, a plurality of time periods are determined; the numbers of the seismic channels falling in the various time periods of the plurality of time periods are counted; according to the signal-to-noise ratio and the numbers of the seismic channels in the various time periods, the energy adjusting factors in the various time periods are calculated; based on the energy adjusting factors, the amplitude adjusting of the to-be-detected channel set is carried out to acquire adjusted seismic signals. In the embodiments of the invention, by considering a problem of non-uniform signal energy distribution caused by the change of the offset of the to-be-detected channel set, exploration signals more according with geological rules can be acquired in a splicing region and an edge region of a continuous block.
Description
technical field [0001] The invention relates to the technical field of geological exploration, in particular to a method and device for adjusting the amplitude of seismic data. Background technique [0002] At present, due to the different construction factors, excitation and reception conditions and signal acquisition time between blocks, the parameters collected between blocks are quite different, such as parameters such as coverage times and single-shot energy strength. When using the seismic data of each block to perform contiguous imaging processing, in the splicing area of the block, since the seismic data of two or more blocks are superimposed, the coverage times of the seismic data in the superimposed place is obviously higher than that in other places. , if the effective amplitude adjustment cannot be carried out, it will inevitably lead to the phenomenon of arcing; in the edge area of the block, due to acquisition reasons, the coverage times of seismic gathers ...
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IPC IPC(8): G01V1/28G01V1/34
CPCG01V1/28G01V1/34G01V2210/512
Inventor 杜磊郭平高树生柳世光冯海涛孙晶波卢明德张高蓝阔董兵波桑雨王国雷
Owner PETROCHINA CO LTD