低含量凝析油气藏提高采收率的方法研究  

Study on Methods for Improving Oil Recovery in Low Content Condensate Oil and Gas Reservoirs

作　　者：王凯[1] WANG Kai(Xi'an Shiyou University,Shaanxi Xi'an 710065,China)

机构地区：[1]西安石油大学,陕西西安710065

出　　处：《广州化工》2023年第11期203-206,共4页GuangZhou Chemical Industry

摘　　要：某含油地质区块为凝析油气藏类型,经过较长时间的开采,其地层压力与储量同步下降,导致反凝析污染现象,采收率也因此受到影响。为了进一步提高采收率,研究过程介绍了油田开采现状及凝析油气藏的储量,在此基础上提出两种可行的采收率提升方法,分别为CO_(2)吞吐法和甲醇+注气吞吐法。经过敏感性分析、注入模式对比、参数优选等过程,最终确定CO_(2)吞吐方法能够更好地改善凝析油采收率和凝析气采收率。A certain oil bearing geological block is a type of condensate oil and gas reservoir.After a long period of exploitation,the formation pressure and reserves synchronously decrease,leading to the phenomenon of retrograde condensate pollution,and thus affecting the recovery rate.In order to further improve oil recovery,the research process introduced the current situation of oilfield development and the reserves of condensate oil and gas reservoirs.Based on this,two feasible methods for improving oil recovery were proposed,namely CO_(2)huff and puff method and methanol+gas injection huff and puff method.After sensitivity analysis,injection mode comparison,parameter optimization,and other processes,it was ultimately determined that CO_(2)huff and puff method could better improve the recovery rate of condensate oil and condensate gas.

关 键 词：低含量凝析油气藏 采收率 提升方法 

分 类 号：TE377[石油与天然气工程—油气田开发工程]