Analysis on effect of prediction and suppression of free-surface multiple on basis of data-consistent principle
Huang Xin-wu1, Niu Bin-hua2, Liu Guang1, Zhao Bing1, Li Teng1
1. College of Engineering Technology,China University of Geosciences,Beijing City,100083,China;
2. College of Geophysics and Information Technology,China University of Geosciences,Beijing City,100083,China
Abstract：Based on the principle of method for data-consistent prediction and suppression of free-surface multiple,the paper studied the method of iterative adaptive multiple suppression used for the multiple-suppressed processing of model data and practical offshore seismic data. The model test and practical offshore seismic data processing showed that in comparison with conventional multiple-eliminated method,the method is characterized by rapid convergence and better keeping the energy of effective waves. It should pay special attention to the following points when using the method:first,based on data-consistent principle and for the predicted free-surface multiple by conversion in time-space domain,the predictive operator of multiple can use the raw data containing the multiple,also can use the data partially eliminating multiple (for example,the multiple-suppressed data by hyperbolic Radon transform filtering method),which is able to gain better multiple-suppressed results; second,in a certain simplified condition,the prediction and suppression of free-surface multiple can be expressed as linear mean-square inversion process,and the implemental process is iterative adaptive process,the better multiple-suppressed results is able to be gained only from a few of iterations; third,for the multiple suppression of complex underground bed structure,the method given in the paper can also suppress the interbed multiple while effectively suppressing various free-surface-relative multiple,better keeping the energy of primary reflections.
黄新武, 牛滨华, 刘光, 赵兵, 李腾. 基于数据一致性原理预测与压制自由表面多次波的效果分析[J]. 石油地球物理勘探, 2009, 44(4): 409-416.
Huang Xin-wu, Niu Bin-hua, Liu Guang, Zhao Bing, Li Teng. Analysis on effect of prediction and suppression of free-surface multiple on basis of data-consistent principle. OGP, 2009, 44(4): 409-416.
