秦皇岛32-6地区油气运移输导体系及成藏模式研究

油气运移输导体系是成藏动力学研究的重点及难点之一.秦皇岛32-6地区主要发育3种类型的输导体:骨架砂体、断层和不整合面.其中断层又分为基底断层和盖层断层2种,基底断层主要是沟通烃源岩与圈闭,盖层断层则控制着新近系油气的再分配,馆陶组厚层块状砂砾岩体在油气侧向运移过程中被称为油气运移"高速公路",而基底不整合面则是潜山及古近系油气成藏的主要通道.由于输导体系不同,导致研究区主要存在2种不同的成藏模式,即新近系网毯式成藏模式和古近系及潜山"S"型成藏模式.

Hydrocarbon migration system and reservoir formation mode in Qinhuangdao 32-6 area

The hydrocarbon migration system is one of the difficulties in the research field of reservoir formation dynamics.There are three main types of hydrocarbon migration systems in the area:skeleton sand-body,fault and basement rock unconformity.The fault can also be divided into two types of basement fault and shallow cap fault.The basement fault is the primary migration pathway from hydrocarbon source and trap,and the shallow cap fault controls the redistribution of Neogene oil and gas.With the thick massive conglomerate sand-body of Guantao Formation is called as the "highway" for hydrocarbon migration,while the basement unconformity is the main lateral pathway for the formation of buried hill and Paleocene reservoir.Due to the different migration systems,there are two typical reservoir formation modes in the area:the network-carpet reservoir formation mode of Neogene and "S"-shaped reservoir formation mode of buried hill and Paleocene.