塔中地区卡塔克隆起奥陶系油气运聚规律分析

马中远 丁辉 朱秀香

中国石化西北油田分公司勘探开发研究院，新疆 乌鲁木齐 830011

Research Institute of Exploration and Development, Northwest Oilfield Company, SINOPEC, Urumqi 830011, China

卡塔克隆起奥陶系碳酸盐岩缝洞型油气藏是塔中地区重要的勘探领域，其油气富集规律复杂，文中试图从油气运聚的角度来剖析卡塔克隆起奥陶系的油气成藏问题。研究认为，塔中卡塔克隆起奥陶系主要发育2类油气运移输导体系，即断裂￣裂缝输导体系和断裂￣裂缝￣不整合面输导体系。深大断裂作为油气源断裂，垂向输导，优势充注；断裂、裂缝与不整合面组成的输导体系网络侧向调整运移；以单一油气聚集单元为单位，以良好的保存条件为前提，位于输导体系上倾的遮挡部位是油气聚集的有利区；塔中油气藏为多期成藏，且以喜马拉雅期为主，加之输导体系的差别，使得油气藏在空间上表现为差异聚集的特点，其运聚模式可归纳总结为垂向优势充注、侧向网状输导、纵横向差异聚集。

The Ordovician fractured-vuggy carbonate reservoir in Katake Uplift of middle Tarim Basin is the important exploration field in this area, but the hydrocarbon accumulation regularity is complex. This article tries to analyze hydrocarbon reservoir generation from the angle of oil and gas migration and accumulation. Study shows that two kinds of oil and gas migration systems develop in Katake Uplift of middle Tarim Basin, which are fault-fracture migration system and fault-fracture-unconformity surface migration system, In which, the deep fault as the oil source fault vertically migrates and predominately fills, and the migration system network which is composed of fault and unconformity surfaces can laterally migrates. As the unit of single hydrocarbon accumulation and on the premise of good preservation condition, the favorable zone of petroleum accumulation is located in the inclination of blocking position in migration system. The hydrocarbon reservoirs formed by multi period of accumulations and mainly in Himalayan period. In addition to the difference of migration systems, the reservoir shows as the differential accumulation characteristics on the space and their migration patterns can be summarized as following: vertical edge filling, lateral reticular migration, horizontal and vertical differential accumulation.

10.6056/dkyqt201501003