塔里木盆地台盆区古生界油气输导体系与勘探方向

古生界是塔里木盆地的主要勘探目的层,通过分析古生界油气输导层、不整合面和输导型断裂分布特征,认为台盆区奥陶系碳酸盐岩输导层、泥盆系砂岩输导层、加里东期和海西期的不整合面和断裂组成了良好的输导体系;划分了海西晚期主成藏期的中、下奥陶统顶面油气运聚单元,根据运聚单元与输导体系差异、有效烃源岩热演化差异在空间上的配置关系,对油气运聚单元的运聚效率进行了综合评价,进而提出塔北沙西凸起-阿克库勒凸起、塔中Ⅰ号断裂带和塔中10-塔中1井一带是台盆区大型油气田的勘探方向,中央隆起两个倾没端、满西地区、阿瓦提坳陷北部是值得高度重视的3个勘探领域。

Paleozoic Carrier system in platform-basin transitional area of Tarim basin and future exploration

The Paleozoic is the main exploration target in Tarim basin.An analyze on the distribtuion of the hy- drocarbon carrier beds,unconformity surfaces,and conductive faults in the Paleozoic,shows that a good carrier system is formed in the platform-basin transitional area by the Ordovician carbonate carrier bed,Devonian sand- stone bed,and the Caledonian and Hercynian unconformity surfaces and faults.The units of hydrocarbon migra- tion and accumulation are also recognized on top of the Middle-Lower Ordovician for the main reservoiring period in the late Hercynian.Based on the spatial arrangement of the migration and accumulation units,the carrier sys- tem and the thermal evolution of effective source rocks,a comprehensive evaluation is carried out on the migra- tion and accumulation efficiency of the units.It is further proposed that the Shaxi-Akekule swell,Taozhong I fault zone,and area surrounding well Taozhong-10 and Tazhong-1,be the future exploration targets in the plat- form-basin transitional area,and three areas,namely the two plunges of the central uplift,the Manxi area,and the northern Awati depression,be worth of much attention during the exploration.