石油钻采工艺2024，Vol.46Issue(5)：600-617,18.DOI:10.13639/j.odpt.202409001
非均质含大孔道油藏体膨颗粒凝胶体系调驱控水微观可视化优化方法
Optimization method with microscopic visualization of water control mechanism by combination of swelling particles and gels by in heterogeneous reservoirs with large pores
摘要
Abstract
In heterogeneous reservoirs with high water consumption bands,the effect of single flooding technique after multi-phase flooding is getting worse and worse,and the combination of bulk particle and gel flooding has potential.The study of the micro-mechanism of the combination of bulk particle and gel is of great importance to reservoir adaptability and parameter optimization.The relationship between permeability and pore throat size was determined through the combination of mercury injection curves and nuclear magnetic resonance T2 spectra,leading to the establishment of a corresponding microscopic displacement model.Microfluidic experiments and visual glass chip models were employed to directly observe the microscopic blocking mechanisms of bulk particles and gels.The bulk particle size corresponding to the actual pore throat size was evaluated based on injection capacity.Based on these observations,the injection parameters of bulk expanded particles and gels were evaluated and optimized using longitudinal and planar heterogeneity models.When the bulk expansion particle diameter to pore throat diameter ratio(BTR)was less than 1.0,injection was more effective.However,when the BTR exceeded 2.0,injection became difficult.Larger particles entering the pore throat exhibited greater strength post-expansion,resulting in better plugging properties.The injection effect was optimal with a higher proportion of bulk slug(0.7 PV)and a lower proportion of gel slug(0.3 PV).Compared to pure gel or bulk slug,the recovery rate increased by 20.1%.The combination of glue and bulk expansion particles can improve oil recovery by plugging heterogeneous reservoirs dominated by large pores.关键词
油藏工程/工程技术/提高采收率/化学驱/体膨颗粒/凝胶/微观可视化实验Key words
Reservoir engineering/Unconventional oil and gas/Engineering technology/Enhanced oil recovery/Combined chemical flooding/Regulation and flood control/Most particles分类
能源科技引用本文复制引用
涂彬,李杰,杨光辉,寸少妮,方凯,李相方..非均质含大孔道油藏体膨颗粒凝胶体系调驱控水微观可视化优化方法[J].石油钻采工艺,2024,46(5):600-617,18.基金项目
延长油田集团科技攻关项目"油田精细注水开发调整对策研究"(编号:ycsy2022ky-c-03) （编号:ycsy2022ky-c-03）
中国石油化工集团公司重大项目"非均相复合驱大幅度提高采收率技术研究与应用"(编号:P23238). （编号:P23238）
