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,采用非对称走时克希霍夫叠前时间偏移方法进行数据处理。与常规叠后时间偏移和弯曲射线克希霍夫叠前时间偏移相比,非对称走时克希霍夫叠前时间偏移成果剖面绕射波归位合理,断层、断点清晰,不整合面成像及奥陶系内幕碳酸盐缝洞体反射结构更加清楚,横向分辨率进一步提高。
In recent years, pre-stack time migration has developed rapidly in various fields. The composite reservoir in the 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. Compared with poststack time migration and conventional bend-ray Kirochhoff pre-stack time migration, the imaging resulting from asymmetric travel time Kirochhoff pre-staek time migration is clearer in images of faults, breakpoints, planes of unconformity and reflector structures in the Ordovician carbonate reservoir. The lateral resolution of the stack section is improved.
出处
《物探与化探》
CAS
CSCD
北大核心
2011年第5期643-647,共5页
Geophysical and Geochemical Exploration
关键词
速度模型
非对称走时
叠前时间偏移
地震成像
velocity model
asymmetric travel time
prestack time migration
seismic imaging
