三维叠前时间偏移技术在塔河地区的应用  

Application of 3-D prestack time migration in Tahe oilfield.

作　　者：王汝珍[1] 袁联生[1] 李鹏[1] 陈杰[1] 武永山[1] 

机构地区：[1]中国石油化工股份有限公司勘探开发研究院南京石油物探研究所,江苏南京210014

出　　处：《勘探地球物理进展》2006年第5期360-365,369,共7页Progress in Exploration Geophysics

摘　　要：针对塔河油田“复式”成藏组合所具有的油气圈闭类型复杂、储层厚度薄、构造幅度小、岩性横向变化大和非均质性强等特点,以A区块为例．采用三维叠前时间偏移的方法进行资料处理。重点介绍了速度建模等关键技术及其有关参数的选择,从而得到了理想的结果。叠前时间偏移与叠后时间偏移结果相比,具有丰富的奥陶系碳酸盐岩裂缝-溶孔内幕,清晰的奥陶系顶不整合面。断层、断点可靠,并有清楚的三叠系反射结构。The composite reservoir in Tahe oilfield is complicated in type of hydrocarbon trap,thin in reservoir thickness,low in amplitude of structure,laterally variable in lithology,and strong in heterogeneity.This paper presented a case study of 3- D prestack time migration processing in A block in Tahe oil- field,with emphasis on the construction of velocity model and parameter selection.Compared to poststack time migration, prestack time migration results in clear images of fractures and cavities in the Ordovician carbonate rocks,and definite uncon- formities at top of the Ordovician.Faults,breakpoints,and the Triassic reflection configurations are readily recognized.

关 键 词：塔河油田 油气圈闭 三维地震资料 叠前时间偏移 速度建模 

分 类 号：P631.443[天文地球—地质矿产勘探]