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濮城油田南区 Es下2 1～ 5油藏属于浅湖背景下的三角洲沉积体系 ,水下分流河道沉积构成了该区的骨架砂体 ,单个砂体垂向上主要表现为多期正韵律叠加型。储层以细粉砂岩为主 ,层内非均质性较弱 ,层间非均质性较强 ,平面非均质性介于两者之间 ,渗透率变异系数 0 .5～ 0 .7。剩余油主要分布在断层附近、储层物性变差和注采井网不完善地区。进行剩余油挖潜取得明显效果 ,水驱控制程度提高 6% ,水驱动用程度提高 8% ,采收率提高 1 .64%
The Es 2-1 reservoirs in the southern area of Pucheng Oilfield belong to the delta depositional system under the background of shallow lakes. Sedimentary sand bodies are formed in the submarine distributary channel deposits. The vertical distribution of individual sand bodies is mainly the multi-period positive rhythm superposition type. The reservoirs are mainly composed of fine siltstones. The intra-layer heterogeneity is weak, the inter-layer heterogeneity is strong and the plane heterogeneity is between the two. The coefficient of variation of permeability is 0.5 ~ 0.7 . Remaining oil is mainly distributed in the vicinity of the fault, reservoir properties deteriorated and well injection well network imperfections. The remaining oil tapping achieved significant results, the degree of waterflood control increased by 6%, the degree of water-driven use of 8%, the recovery rate increased by 1.64%