摘要
为提高LH 2500万相对分子质量聚合物驱替效果,进行了单段塞和多段塞驱油实验,通过实验确定A块试验区采用段塞组合方式和注入方式为0.2、0.6、0.2 PV(1800、1500、1200 mg/L)。A块试验区与常规2500万聚合物区块相对比,注入压力上升幅度基本一致,但油层动用特别是薄差层动用更好,注采能力保持更好;注入相同PV条件下,采出井含水率降幅更大,见效更快,好于注常规2500万聚合物区块;采出分类井在含水率降幅、受效时间、受效井比例存在差异,Ⅲ类井指标要好于Ⅰ、Ⅱ类井。
In order to improve the displacement effect of lh25 million macromolecule polymer,the oil displacement experiments of single slug and multiple slug were carried out.Through the experiments,the slug combination and injection method of 0.2、0.6、0.2 PV(1800、1500、1200 mg/L)were determined in the test area of zone A.Compared with the conventional 25 million polymer block,the experimental area in zone A had the same increase rate of injection pressure,but the oil reservoir,especially the thin differential layer,had better injection and production capacity.Under the same PV injection,the water cut of the production well decreased more and the effect was faster,which was better than the injection of 25 million polymer blocks.There are differences in water cut rate,effective time and effective ratio of producing classified wells,and the indexes of type Ⅲ wells are better than those of type Ⅰ and Ⅱ wells.
作者
李波
Li Bo(The Third Oil Production Plant,PetroChina Daing Oilfield Company,Daqing Heilongjiang 163113,China)
出处
《石油化工高等学校学报》
CAS
2020年第3期37-42,共6页
Journal of Petrochemical Universities
基金
国家科技重大专项(2016ZX05054)。
关键词
聚合物驱
段塞
采收率
含水率
Polymer flooding
Slug
Recovery factor
Water cut
