Rapid static correction method for one-time processing of complex surface seismic data
A technology of complex surface and seismic data, applied in the field of seismic exploration, can solve the problems of long period and low precision of static correction, and achieve high timeliness and reliable accuracy
Active Publication Date: 2021-01-12
PETROCHINA CO LTD +1
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[0005] The present invention provides a fast static correction method for one-time processing of complex surface seismic data to overcome the defects in the prior art such as low static correction accuracy and long period of primary seismic data processing in new exploration areas under complex surface conditions
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[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0040] Such as figure 1 As shown, the embodiment of the present invention provides a fast static correction method for one-time processing of complex surface seismic data, which specifically includes:
[0041] Step S1, screening the complexity of the ground surface through the elevation and coordinates of the artillery inspection point;
[0042] If there are two geodetic coordinate horizontal plane projection distances of 1 km in the work area, the elevation difference between the two receiver points is less than 200 meters, and it is judged as a relatively low complex surface condition;
[0043] If there are two geodetic coordinate horizontal plane projection distances of 1km in the work area, the elevation difference between the two receiver points is greater than 200 meters and less than 500 meters, then it is judged as a relatively moderately com...
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The invention relates to the technical field of seismic exploration, in particular to a rapid static correction method for one-time processing of complex surface seismic data. The method comprises thefollowing steps: screening the surface complexity; determining the elevation of the detection point after spatial smoothing, writing the elevation into a channel head, and calculating a static correction value a; selecting a single shot record with a high signal-to-noise ratio, measuring a hyperbolic speed after denoising, determining a surface wave frequency band range and amplitude characteristics, and removing a surface wave and an abnormal value; cutting off 70% of data behind the absolute value direction of the offset on the CMP gather, forming a superimposed data volume by using the gather of the first 30% of offset after NMO correction, and performing RNA processing to serve as a model trace; performing dominant frequency band residual static correction on the model trace and the trace gather with the offset of 30% to obtain a static correction value b; and performing subsequent denoising, amplitude compensation, deconvolution, speed analysis and offset processing on the staticcorrection values a and b. According to the rapid static correction method provided by the invention, rapid static correction with reliable precision and high timeliness in primary processing can berealized.
Description
technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a method for efficiently and quickly completing static correction in one-time processing of seismic data under complex surface conditions. Background technique [0002] With the continuous deepening of resource exploration in my country, more and more exploration areas need to obtain underground reflection wave information through seismic exploration, especially the seismic data of new exploration areas under complex surface conditions such as mountains, loess plateaus, sand dunes, and hills. The most important test is static correction, and due to the lack of understanding of surface conditions and underground velocity, the processing cycle is often long. No matter which static correction technology or combination of technologies is used, it is difficult to meet the timeliness requirements of rapid exploration deployment. [0003] The reasons are as follows: ①The surf...
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IPC IPC(8): G01V1/36G01V1/28
CPCG01V1/362G01V1/28G01V2210/53
Inventor 包燚卢广达王成裴江云刘国友史武来
Owner PETROCHINA CO LTD