Research on the application of mixed source data matching processing technology in 3D seismic exploration of coal field
A coal mine in Huaibei,Anhui Province,is carrying out a 3D seismic survey of the coalfield,using a combination of explosive seismic source and vibroseis to collect seismic data.There are differences in phase,frequency and signal-to-noise ratio between two sources,especially in the same offset take-off time of two sources.In order to solve this problem,first,we investigate the polarity of two kinds of vibroseis,reverse the polarity of vibroseis,make the polarity of the two kinds of vibroseis keep the same on the phase of data acquisition,and then use the matched filtering technology,the data of vibroseis are processed by matching filter,so that the two vibroseis keep the same phase and frequency,and the first arrival of vibroseis is easy to be identified and picked up automatically.The same offset take-off time of two kinds of vibroseis data after matching processing is investigated,and it is found that the two kinds of data have large systematic time difference,The first break is picked up after the time difference correction of the vibroseis data.Finally,the tomographic statics method is used to solve the statics problems caused by near-surface and time difference correction in the exploration area.After polarity reversal,matched filtering,time difference correction and tomographic static correction,the continuity of coal seam wave group at different seismic source splicing is improved,it lays a good foundation for the further processing of the later data,and the application effect is good.The method used in this paper will be the key technology of mixed source acquisition data processing,which has important research significance and application value.
万方数据
维普
