塔河油田油气输导体系与运聚模式

Hydrocarbon Conduit Systems and Migration-Accumulation Model in Tahe Oilfield

塔里木盆地塔河油田具有多期成烃、多运移通道、多期成藏的特征。根据塔河油田及其区域地质情况,论述了断层及构造裂隙,不整合面和古风化壳,奥陶系孔、洞、缝和连通砂体四类输导系统。它们控制了不同时代、不同储集层油气的运移聚集,制约了不同区块、不同类型油气藏的形成与演化,根据输导体系对油气运聚的控制形式与状况,可以划分为网络型运移聚集模式和折线型运移聚集模式。

Tahe oilfield in Tarim basin is characterized by multi-stage hydrocarbon generation,multi-channel migration and multi-stage petroleum accumulation.This paper discusses the hydrocarbon conduit systems such as fault and structural fissure,unconformity and paleo-weathering crust,Ordovician vug and fracture as well as interconnected sand body in light of Tahe oilfield and its regional geological situations.The study shows that it is these systems that control the hydrocarbon migration and accumulation in different periods and reservoirs,the formation and evolution of different areas and types of pools.The systems can be classified with network-like model and zigzag-like model for petroleum migration and accumulation.