位于金湖凹陷西南部的闵桥是苏北高产油区之一，该区以深埋于１４００～１６００ｍ之下的阜宁组（Ｅｆ１—Ｅｆ１２）玄武岩（５８～６０Ｍａ）为储油层，其上阜宁组二段上部（Ｅｆ２２—Ｅｆ３２）为生油层．与储油密切相关的玄武岩中孔洞缝组合取决于岩相和相带中的不同部位，主要的储油岩相构造类型为：（１）玄武岩古风化壳；（２）岩流单元上部带；（３）淬碎角砾岩．深埋玄武岩为一基座直径约６．５ｋｍ的盾火山，现采油区位于这一盾火山西南近火口带．推断火口位置在油区ＮＥ１．５～２ｋｍ范围内，盾火山其余３／４面积可作为扩大油田的靶区 Minqiao, located in the southwestern part of Jinhu depression, is one of the high-oil-producing areas in northern Jiangsu Province. The Ef1-Ef12 basalts (58 ~ 60Ma) buried below 1,400 ~ 1,600m are reservoirs. The second section of Funing Formation (Ef22-Ef32) is a raw oil layer. The combination of pore-caverns in basalt closely related to oil storage depends on different parts of lithofacies and facies. The main types of oil-bearing facies are (1) basalt weathering crust, (2) upper part of rock flow unit, (3) Quench breccia. The deep basalts are shield volcanoes with a base diameter of about 6.5km. The oil recovery area is located in the southwest near the mouth of this volcano. It is inferred that the location of the crater is in the range of 1.5 ~ 2km from NE1 of the oil zone, and the remaining 3/4 area of ​​the shield volcano can be used as the target of expanding the oilfield