石油地质与工程2026，Vol.40Issue(2)：48-54,7.DOI:10.26976/j.cnki.sydz.202602007
中高渗砂砾岩油藏聚合物驱后非均相复合驱技术研究
Research on heterogeneous composite flooding technology after polymer flooding in medium-high permeability glutenite reservoirs:a case study of interval Ⅳ1-3 in Shuanghe Oilfield
摘要
Abstract
After polymer flooding in Interval Ⅳ 1-3 of the northern block of Shuanghe Oilfield,severe underground water-channeling zones have developed,and the remaining oil distribution has become increasingly scattered and complex.To further enhance oil recovery(EOR),this study focused on the optimization of heterogeneous composite flooding systems and the investigation of their displacement mechanisms.Based on the reservoir pore-throat structure characteristics and remaining oil distribution rules,a heterogeneous composite flooding system with graded plugging capacity was developed.Physical simulation experiments show that after polymer flooding,0.50 pore volume(PV)of high-concentration polymer flooding,binary composite flooding,and heterogeneous composite flooding systems were injected separately.The oil recovery rate of 2 000 mg/L polymer flooding was only increased by 5.2%,whereas that of the heterogeneous composite flooding system was at least 2.5%higher than that of binary composite flooding.This indicates that the PPG particles in the heterogeneous composite flooding system exert viscoelastic effects,which promote fluid diversion and improve oil displacement efficiency.Field pilot test data demonstrate that the injection pressure in the test area increased by 5.4 MPa,the daily oil production rose from 24.0 t(before injection)to 65.7 t,the cumulative oil increment reached 8.2×104 t,and the stage oil recovery rate was enhanced by 2.1%.The study confirms that heterogeneous composite flooding technology can effectively produce the remaining oil in reservoirs after polymer flooding,thereby providing a new technical scheme and theoretical support for EOR in similar high-water-cut reservoirs.关键词
中高渗砂砾岩油藏/非均相复合驱油技术/剩余油分布/微观驱油机理Key words
medium-high permeability glutenite reservoir/heterogeneous composite flooding technology/remaining oil distribution/microscopic oil displacement mechanism分类
能源科技引用本文复制引用
张连锋,李雨衡,李俊杰,刘盛阳,张卓,张伊琳,郭艳..中高渗砂砾岩油藏聚合物驱后非均相复合驱技术研究[J].石油地质与工程,2026,40(2):48-54,7.基金项目
中国石化股份有限公司示范工程"中高渗砂砾岩油藏聚合物驱后非均相复合驱技术"(P19007-4)与中国石化股份有限公司重大专项"聚合物驱后油藏水驱提高采收率技术"(P16080). （P19007-4）
