苏北页岩油二氧化碳强压质换技术  

CO_(2) High Pressure Quality Exchange Technology of Shale Oilin Northern Jiangsu Province

作　　者：吴壮坤[1] 张宏录[1] 池宇璇 WU Zhuangkun;ZHANG Honglu;CHI Yuxuan(Petroleum Engineering Technology Research Institute,Sinopec East China Oil&Gas Company,Nanjing,Jiangsu,210031,China)

机构地区：[1]中国石化华东油气分公司石油工程技术研究院,江苏南京210031

出　　处：《石油钻探技术》2024年第4期87-93,共7页Petroleum Drilling Techniques

基　　金：中国石化科技攻关“苏北CCUS-EOR一体化技术研究”(编号:P21107)部分研究内容。

摘　　要：为了保持苏北页岩油藏能量,降低产量递减率,提高页岩油藏采收率,研究了苏北页岩油CO_(2)强压质换技术。采用苏北页岩油藏岩心进行了室内试验,分析了CO_(2)注入压力、焖井时间对原油采出程度的影响,CO_(2)注入量对原油采收率的影响;采用数值模拟软件,进行了SD1J井注入时机、注入量、注入速度及焖井时间的优化,并进行了SD1J井注超大量CO_(2)强压质换技术现场试验。SD1J井措施后自喷正常生产,产液量由38.6 t/d降至30.3 t/d,产油量由14.0 t/d升至29.2 t/d,含水率由63.8%降至3.5%。研究表明,CO_(2)强压质换技术能够提高页岩油藏地层能量和降低产量递减率,为提高页岩油藏开发效果提供了一种新的技术途径。In order to maintain the energy of shale oil reservoirs in northern Jiangsu Province,reduce the decline rate of production,and improve the recovery rate of shale oil reservoirs,the study on CO_(2) high pressure quality exchange technology of shale oil in northern Jiangsu Province were carried out.The effects of CO_(2) injection pressure and soaking time on crude oil recovery percent and CO_(2) injection rate on crude oil recovery factor were analyzed by using shale oil reservoir cores in northern Jiangsu Province for laboratory experiments.Numerical simulation software was used to optimize the injection time,injection volume,injection rate,and shut-in time of Well SD1J.A field test of high pressure quality exchange technology with a super large volume of CO_(2) was carried out in Well SD1J.After the measure implementation,the well produced oil normally.The daily fluid production decreased from 38.6 t/d to 30.3 t/d,and the daily oil production increased from 14.0 t/d to 29.2 t/d.The water content decreased from 63.8%to 3.5%.The results show that CO_(2) high pressure quality exchange technology can increase the formation energy of shale oil reservoirs and reduce the decline rate of production,which provides new technical support for improving the development effect of shale oil reservoirs.

关 键 词：页岩油 二氧化碳 强压质换 采收率 现场试验 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]