杏北开发区葡I1～3聚驱注入界限实验研究
Experimental Study on Injection Limit of Polymer Flooding for PI1～3 Reservoir in Xingbei Development Zone
武佳奇1
作者信息
- 1. 北京兴油工程项目管理有限公司,北京 100083
- 折叠
摘要
特高含水期油田注聚合物能够有效封堵大孔道,改变液流方向,提高波及体积,从而提高采收率.针对杏北开发区葡 I1～3 主力非均性储层聚驱注入界限识别不清、注入参数选取缺乏依据的问题,基于不同储层渗透率、聚合物相对分子质量和聚合物质量浓度开展注入性实验,评价了注聚效果,确定了注聚界限.结果表明:聚合物相对分子质量越大、质量浓度越大,注入速度越低;注入速度高于0.35 m·d-1为注入能力强,0.35～0.25 m·d-1为注入能力中等,0.25～0.15 m·d-1为注入能力较差,小于0.15 m·d-1为注入能力差.
Abstract
Polymer injection can effectively block the large pores,change the fluid flow direction,increase the sweep volume and enhance oil recovery in oil fields at the stage of ultra-high water cut stage.In view of the problems of unclear identification of polymer flooding injection limits and lack of basis for the selection of injection parameters in the main heterogeneous reservoirs of PI1～3 in Xingbei development zone,in this paper,the polymer injection effect was evaluated,and the polymer injection limits were determined by carrying out the injection experiments of polymer flooding with different reservoir permeability,polymer molecular weight and polymer concentration.The results showed that the higher the molecular weight and mass concentration of polymer,the lower the injection rate.If the injection rate was higher than 0.3 m·d-1,the injection capacity was strong;If the injection rate was 0.35～0.25 m·d-1,the injection capacity was medium;If the injection rate was 0.25～0.15 m·d-1,the injection capacity was poor;If the injection rate was less than 0.15 m·d-1,the injection capacity was the worst.
关键词
聚合物驱/注入界限/特高含水/中高渗透油藏Key words
Polymer flooding/Injection limit/Extra-high water cut/Medium-high permeability reservoir引用本文复制引用
出版年
2024
NETL
NSTL
万方数据