低渗透窄条带砂体油田聚合物驱见效特征及效果

Analysis of the effectiveness and characteristic of polymer flooding in low permeability narrow strip sand reservoir

以大庆长垣南部葡北油田聚合物驱为研究对象,从试验区块的动态变化情况以及油层发育、提液措施对聚合物驱的作用等方面,分析了低渗透窄条带砂体油田聚合物驱见效特征和效果.结果表明:聚合物区块的油层发育厚度和规模对聚合物驱效果影响较大;挑选砂体发育厚度大并有一定规模的区域进行聚合物驱,可获得较好的效果;适时采取提液措施能够使聚合物驱效果进一步提高.

The polymer flooding test site of Pubei oil field in south of Changhuan in Daqing is dealt with in this paper. From several aspects, such as change of performance in test site, development of oil beds, function of fluid lifting in polymer flooding, the effectiveness and responding characteristic of polymer flooding in low permeability narrow strip sand reservoir have been analyzed. The results indicate that the scale and development thickness of oil beds in polymer flooding tracts have played an important part in the effectiveness of polymer flooding, better results can be achieved by choosing tracts that have sand reservoir of bigger development thickness and a certain scale to do the test of polymer flooding, the effectiveness of polymer flooding can be further improved by measures of fluid lifting.