孤岛油田进行了聚合物驱试验 ,取得了明显的降水增油效果 ,注聚区内油井单井见效特点不同 ,按单井含水的变化划分为 4种类型 :“U”字型 ,单层生产 ,油层厚度较薄 ,含油饱和度高 ,具有含水下降幅度较大、见效时间长、累计增油量高、见聚较晚等特点 ;“V”字型井 ,多出现在油层厚度大 ,油层层内、层间非均质性强的区域 ,其含水下降幅度较小 ,见聚早 ,且大多见效同时见聚 ;“W”字型井 ,多为边角井 ,注采关系不稳定 ,含水下降幅度小 ,增油量较差 ;不见效型 ,受水驱干扰大 ,未见增油降水效果。每种类型的影响因素不同 ,主要影响因素是储集层性质、剩余油饱和度、注采关系等。图 1表 1参 2 (蔡燕杰摘 ) In Gudao Oilfield, polymer flooding tests have been carried out, and obvious rainfall and oil-enhancing effect has been achieved. There are four different types of oil well single-well effective in injection-polymerized zone. According to the single-well water change, they are divided into four types: “U” , The thickness of oil layer is thin, the oil saturation is high, which has the characteristics of large decrease in water content, long effective time, high cumulative oil yield and late accumulation. The “V” shape wells mostly appear in thick oil layers, In the strata and inter-strata heterogeneity areas, the water cut-off rate is small, the polygalaceous is early, and most of the seemingly effective ones meet at the same time. The “W” shaped well is mostly a multilateral well with instable relationship between injection and production, Less drop, less oil increase; no effect, interference by the water flooding, no oil precipitation effect. Each type of influencing factors is different, the main influencing factors are reservoir properties, remaining oil saturation, injection-production relationship and so on. Figure 1 Table 1 Reference 2 (Cai Yanjie Abstract)