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以杏北开发区投产较早的杏四～六面积南、北两个聚驱区块为基础,在确定聚驱不同开发阶段,即初期、中期、后期三个阶段低效井的基础上,根据聚区井的受效时间和受效特点,将低效井分为见效慢型、见效时间短型、见效差型及未见效型四种,并对其形成原因进行分析,提出治理对策:注聚初期阶段,主要通过钻补充井、水驱井利用、转注、对水驱井的聚驱目的层补孔等完善注采关系,并通过调整部分注入井的注入量、调剖、分层注聚等措施缓解平面及层内、层间矛盾;注聚中期阶段,主要通过提高注入井的注入浓度、扩大聚合物溶液的波及体积、实施压裂等改善油层条件;注聚后期阶段,主要通过改变液流方向、井组注采调整相结合、周期注聚等方式治理低效井。同时,举例说明在聚驱不同开发阶段治理低效井的成功做法,这些方法适合聚驱不同开发阶段的开发特点,具有较强的针对性,对提高聚驱开发效果具有指导作用。
Based on the two poly-flooding blocks in the areas of South and North of apricot four to six area where the Xingbei Development Zone was put into operation, on the basis of determining inefficient wells in different development stages of poly-flooding, that is, initial stage, middle stage and later stage, According to the effective time and characteristics of polygamy wells, the inefficient wells are divided into four types: slow effective type, short effective time type, poor performance type and no effective type. The causes of formation are analyzed and the management strategies are put forward: In the initial stages of injection and consolidation, the relationship between injection and production is improved through drilling and replenishment, utilization of water-flooding wells, filling-in of the flooding purpose flooding wells, etc. By adjusting injection volume, profile control and stratification of some injection wells, Injection and agglomeration measures to alleviate the plane and inter-layer and inter-layer conflicts. During the middle stage of injection and injection, the injection volume of injection wells is increased, the volume of polymer solution is broadened, fracturing and other conditions are taken to improve the reservoir conditions. By changing the flow direction, combination of well group injection and production adjustment, periodic injection and other ways to deal with inefficient wells. At the same time, an example is given to illustrate the successful practices of treating inefficient wells in different development stages of poly-flooding. These methods are suitable for the development characteristics of different development stages of poly-flooding and have strong pertinence to guide the development of poly flooding.