源断裂对兴安岭群油气成藏的影响及评价

Influence and evaluation of fracture through source rocks on the oil and gas reservoir-forming in west slope region

在复杂断块地区,油气的分布和聚集成藏与断裂有着密切的联系。苏德尔特地区兴安岭群断裂比较发育且分布着广泛的源断裂,即断穿源岩的断裂。为了进一步了解油气运移规律及油气聚集成藏的主控因素,开展了兴安岭群源断裂的深入研究。通过研究得到,兴安岭群的油气只能通过断穿南屯组至兴安岭群的源断层进行运移,才能使南屯组源岩生成排出的油气运移至兴安岭群中;在兴安岭群中,源断裂密度越大、距源断裂越近、断距越小的源断裂油气富集程度越高。由此不难看出,源断裂是控制苏德尔特地区兴安岭区群油藏形成与分布的重要条件。

In the complicated block region,the oil formation and distribution are in the connection with fault.The distribution of fault is wide-ranging in the Xing'anling Group in the west slope region.Fracture through source rocks is thread source rock.In order to discern oil and gas transporting pathways and main control factor,we deeply research the fracture in the west slope region.Through research,we realize that oil and gas transporting pathways is only fault between Nantun Group and Xing'anling Group in west slope region,so oil and gas from Nantun Group rocks are able to reach to Xing'anling Group.The more bigger density,the more closer and the more shorter distance from faults,the more abundant oil and gas are.So we can realize that fracture through source rocks play an important part in controlling oil formation and distribution in west slope region.