In Tahe area,large-sized caves and fissure-caves are the main reservoir space types,which are characterized by complex geological characteristics and rapid change in lithology.The seismic response of these kinds of reservoirs is diffraction whose precision of images has a great impact on the reservoir prediction.Based on the scattering theory,the equivalent offset method (EOM ) can obviously improve the precision of diffraction imaging.The equivalent offset prestack migration method and its parallel method were introduced,and a model case was used to illustrate the efficiency of EOM.At last,this method was applied to the real data migration processing in Tahe area.A comparison with the conventional PSTM method shows that,in the EOM profile,the focusing of the carve-fracture diffractions,the images of faults and breakpoints and the lateral resolution have been improved.
李佩, 朱生旺, 宁俊瑞, 王永胜. 等效偏移距叠前时间偏移及其在塔河地区应用[J]. 物探与化探, 2013, 37(6): 1120-1124.
LI Pei, ZHU Sheng-wang, NING Jun-rui, WANG Yong-sheng. THE EQUIVALENT OFFSET PRESTACK TIME MIGRATION AND ITS APPLICATION IN TAHE AREA. Geophysical and Geochemical Exploration, 2013, 37(6): 1120-1124.