Research And Application Of Residual Static Correction Technology

In the seismic data processing,residual static correction processing is a very important task.If the remaining static correction cannot be removed,the “cycle jump” will occur frequently,and this happens mainly due to the following two factors.First,the signal-to-noise ratio of the seismic data itself is low.The static correction amount is not accurate,resulting in the quality of the superimposed profile is not high,and the second is because the residual static correction is greater than half of the seismic wave period.The problem of static correction becomes more and more serious as the earthquake exploration in China will follow the trend of large fluctuations.However,the existence of residual static correction will cause the signal-tonoise ratio of the seismic reflection wave imaging results to decrease,the continuity is deteriorated,and even the pseudo-structure is present,which causes trouble and inconvenience to the later interpretation work.Therefore,research and solve the remaining problem of static correction is of great significance.The thesis revolves around the residual static correction problem encountered in seismic data processing.It systematically describes the theory of static correction and residual static correction,and the assumptions of residual static correction.The simulated annealing algorithm is the main research object.Based on the simulated annealing algorithm proposed by man,this algorithm is applied to the residual static correction processing of seismic exploration.According to the theoretical methods proposed by the predecessors,it is described in detail in the algorithm flow chart,and the algorithm is programmed to realize the correctness and accuracy of the program through theoretical model and actual data.In the algorithm implementation,try to add the "memory factor" into the algorithm,which speeds up the operation of the algorithm and improves the calculation efficiency.At the same time,the error is analyzed in the case of different time windows;the accuracy of the program calculation is compared under different coverage times;in addition,by selecting different time windows under the same horizontal horizon,Determine the size of the correlation coefficient and study the effect of the choice of the time window on the results of the program calculation.Finally,by comparing with a commercial software,the advantages and disadvantages of the residual static correction of the maximum energy method and the simulated annealing method are compared,and more credible conclusions and results are obtained.