叠前偏移技术在夏72井区油气藏中的应用  

APPLICATION OF PRESTACK MIGRATION TECHNOLOGY IN RESERVOIRS OF BLOCK WELL XIA-72

作　　者：仲伟军[1] 尚春[1] 宁良[1] 宋阳[1] 

机构地区：[1]中国石油新疆油田公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830011

出　　处：《新疆地质》2006年第1期55-58,共4页Xinjiang Geology

摘　　要：夏40井区三维地震完钻的70多口探井中,二叠系的油气显示该区有好的油气勘探前景.针对低幅度构造圈闭闭合度小,地震反射波特征有差异,加上地震资料解释存在相位差及闭合差的特点.复杂逆掩断褶带的常规地震资料偏移成像不归位,小断裂和低幅度圈闭难以识别,制约该区的勘探进程.通过综合研究,结合叠前时间偏移处理、叠前深度等建模偏移处理解释攻关,建立了目标区准确的深浅层速度模型.通过精细构造解释顺利完成夏72井油藏描述任务,取得了夏子街地区二叠系油气勘探的重大突破.The oil and gas show observed in the 70 more wells drilled in Block Well Xia-40 reveals that this area enjoys favourable oil and gas exploration prospect. The closure of the low-amplitude traps is relatively small, the characteristics of seismic reflection waves are different, both phase differences and discrepancies in closing existed in seismic explanation, routinely seismic migration imaging in complicated thrusting fault-fold area failed to return back, small faults and low-amplitude traps can not be easily identified, all these factors encumbered the exploration course. We tested the prestack time migration and prestack depth migration and establish the velocity models of both the shalow and deep sections in the studied area. Then we successfully fulfilled the reservoir description of Xia-72 reservoir on the basis of detailed structural explanation, and finally make a breakthrough of the oil and gas exploration in Permian in Block 2 of Xiazijie area.

关 键 词：替前偏移 地震处理 资料解释 油气藏 应用 

分 类 号：P631.4[天文地球—地质矿产勘探]