冀中坳陷蠡县斜坡油藏分布规律与主控因素研究

Rules of Reservoir Distribution of Lixian Slope and Its Critical Controlling Factors in Jizhong Depression

由于任西断层活动范围的限制,造成蠡县斜坡的南北分区、东西分带的构造格局,这也造成了油藏在不同区域的分布不同。南部以浅层油藏为主,油藏类型单一、分布集中;斜坡北部油藏多集中在深层,油藏类型多样,分布零散。斜坡外带以构造、地层、岩性及复合油藏为主,中带以构造油藏和构造-岩性油藏居多,内带多为岩性油藏。对蠡县斜坡的油藏类型和其在平面、剖面上的分布特点,结合不同区域的构造、沉积等成藏因素进行分析,认为主要有4个因素控制了蠡县斜坡的油藏分布,即"构造控藏、油源控区、输导控层、沉积控边"。

Because of the limitation of Renxi fault zone,Lixian slope was divided into 2 sections in SN and 3 zones in EW direction,in which reservoirs had different distributions in different regions.There were shallow reservoirs in the south with simple types and narrow distribution ,while in the north,there were reservoirs with multiple types and deep buried in different directions; in the outer zone there mainly developed structural,stratigraphic ,lithologic as well as composite reservoirs,and there were structural and structural-lithologic-reservoirs in the middle zone,and reservoirs in inner zone.The characteristics of reservoir types and their distribution in plane and vertical directions are analyzed in combination with structure and depositions in different areas,it is deduced that there are four factors controlling the distributions of reservoirs in Lixian slope.Namely 'structure controls the types of reservoirs; source rock controls the range of reservoirs; migration path controls the layer of reservoirs and sedimentary controls thee size of reservoirs.