西安石油大学学报（自然科学版）2025，Vol.40Issue(5)：68-73,6.DOI:10.3969/j.issn.1673-064X.2025.05.008
中渗透油藏径向钻孔-压驱波及实验研究
Experimental Study on Balanced Oil Displacement in Medium Permeability Reservoir by Pressure Flooding
摘要
Abstract
When implementing conventional water flooding measures in old oil fields,it is common to encounter problems such as une-ven sweep and advancing along old waterways of injected water.A radial drilling-pressure flooding experimental model was developed by combining radial drilling technology,and the influence of sequentially opening production wells on the sweep effect of radial drilling-pressure flooding construction was studied based on a five point well pattern.The results indicate that radial drilling can improve the sweep effect of injected water and make the sweep more balanced.The optimal drilling angle is 45°when the permeability defference is 5.Sequentially opening production wells can guide the injection of water into the non mainstream direction.During the pressure flood-ing,opening the production well which is in the area with poor physical properties first can achieve the best oil displacement effect;After pressure flooding,opening the production wells in the same order can achieve worse displacement effect than that the former;After pres-sure flooding,opening all the production wells simultaneously would achieve the worst oil displacement effect due to the difference in the viscosity of oil and water.The recovery rate of forward pressure flooding is 4.67%higher than that of reverse pressure flooding.Adop-ting forward pressure flooding and drilling radial holes between the injection well and the worst performing well,as well as sequentially opening production wells during the pressure flooding process,is beneficial for improving the sweep effect of medium permeability reser-voirs.关键词
压驱/径向钻孔/钻孔角度/差异开井Key words
pressure flooding/radial drilling/drilling angle/sequentially well opening分类
能源科技引用本文复制引用
张世明,王建,张传盈,吴义志,丁甲磊..中渗透油藏径向钻孔-压驱波及实验研究[J].西安石油大学学报（自然科学版）,2025,40(5):68-73,6.基金项目
中国石化科技攻关项目"压驱提速提效开发优化设计技术研究"(P21072-2) （P21072-2）
胜利油田科技攻关项目"复杂断块油藏注采耦合技术推广应用"(YT2302) （YT2302）
