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《Progress in Geophysics》 2007-05
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The application of prestack time migration techniques in sandy conglomeratic imaging of abrupt slope in north of Dongying Sag

LIU Li-bin1,LI Zhen-chun2(1.Geophysical Research Institute of Shengli Oilfield Company,SINOPEC,Dongying 257022,China;2.School of Geo-resource & Information,China University of Petroleum,Dongying 257061,China)  
The northern abrupt slope of Dongying Sag is the developed area of sandy conglomeratic body.Through the research and exploration practices in many years,a lot of sandy conglomeratic fan reservoirs with the characteristic of abrupt slope sedimentary have been found,and these sandy conglomeratic fan reservoirs has become the important exploration targets in Shengli Oilfield.In order to improve the imaging quality of sandy conglomeratic body,prestack time migration was used in this area.Based on the deeply understanding of seismic reflection features of sandy conglomeratic body,we analyzed the adaptability of prestack time migration to Dongying northern zone,discussed the advantages of prestack time migration techniques in improving the quality of seismic imaging in this area,and introduced the key techniques in prestack time migration processing.The results indicated that prestack time migration guided by geologic information significantly improved the imaging quality of sandy conglomerate in northern zone of Dongying,which provided reliable basic data for enhancing the accuracy of exploration of sandy conglomeratic fan reservoir.
【Key Words】： northern zone of Dongying sandy conglomerate prestack time migration migration velocity modeling seismic imaging
【Fund】： 国家自然科学基金(40474041);; 国家863项目(2006AA06Z206);; 国家973项目(2007CB209605)联合资助
【CateGory Index】： P631.4
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