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北二西西块二类油层是萨北开发区第一个二类油层聚驱工业化推广开采区块,2006年底开始注聚,注聚两年后进入含水回升期,2009年4月为缓解污水外排压力,将清水稀释改清水污水混合稀释注聚。本文根据清污水混配后单井含水变化趋势,将含水划分为4种类型,分析归纳每种类型特点及产生原因,并根据不同类型井存在的问题采取相应的调整措施,控制含水回升速度,提高二类油层的聚驱效果,同时为其它注聚区块的调整挖潜提供可借鉴的依据。
North Second West Block second layer of oil is the Sa Bei Development Zone, the first two types of oilfield industrialization to promote the development of polycrystalline block, the beginning of the end of 2006 injection together, two years after the injection into the moisture recovery period, in April 2009 to ease the sewage Row of pressure, water will be diluted with water to dilute the water injection diluted injection poly. Based on the trend of single well water content after mixed sewage, the water is divided into four types, the characteristics and causes of each type are analyzed and summarized, and the corresponding adjustment measures are taken according to the existing problems of different types of wells to control the speed of water recovery, Improve the effect of poly-flooding of the second type oil reservoir, and provide references for the adjustment and tapping potential of other flooding blocks.