新安边油区产量递减主控因素分析及对策

Study on Main Controlling Factors of Production Decline and Technical Policy in Xin′anbian Oil Area

根据新安边油区6314井区油水井的资料,应用递减率因素分析方法,分析了产量递减的主控因素,主要有表皮系数、井网密度,地层压力,井底流压,储层渗透率,储层中油水相对渗透能力,以及油水粘度,含水变化等因素。应用SWOT方法提出了调整对策。结果表明,储层非均质性弱,地层能量保持较好,以及油藏类型单一是6314井区有利于稳产的内部优势因素;束缚水饱和度高,油层构造起伏大是该区域弱势因素;而油井生产时率和储层改造效果是区域调整的外部机会;含水上升速度以及当前井区所处的含水阶段是区域面临的潜在威胁。通过优势、劣势,机会与威胁组合起来,制定出控制含水率上升速度;加强剩余油分布特征研究的调整对策。

Based on the data of oil and water wells in 6314 well area of Xin′anbian Oil Region,the influence of skin factor,well pattern density,formation pressure,bottom hole flowing pressure,reservoir permeability,relative permeability of oil and water in reservoir,oil-water viscosity and water cut change on production change were analyzed by using the factor analysis of decline rate method.On this basis,the development adjustment strategy is put forward by using SWOT method.It is concluded that weak heterogeneity,well maintained formation energy and single reservoir type are the internal dominant factors for stable production in 6314 well area.High original water saturation and large fluctuation of reservoir structure are the disadvantageous factors.The production time rate of oil wells,and the effect of reservoir transformation are the external opportunities for regional adjustment;The rising rate of water cut and the current situation is a potential threat to the region.Through the combination of advantages,disadvantages,opportunities and threats,technical policy of stabilizing production is formulated:1)controlling water cut;2)strengthening the distribution characteristics of residual Oil.