华北油田长岩心注CO _(2)驱替室内实验研究  

Laboratory test on CO_(2)injection displacement in long cores of Huabei oilfield

作　　者：张桂迎 李栋 贾国辉 邓成明 贾志中 ZHANG Guiying;LI Dong;JIA Guohui;DENG Chengming;JIA Zhizhong(NO.3 Oil Production Plant of Huabei Oilfield Company,PetroChina,Hejian,Hebei 062450,China)

机构地区：[1]中国石油华北油田公司第三采油厂,河北河间062450

出　　处：《石油地质与工程》2022年第6期77-81,共5页Petroleum Geology and Engineering

摘　　要：为全面提高华北油田A区块采收率,探索注CO_(2)驱替方式的选择,使用CO_(2)驱替室内实验方法,研究不同注入压力条件下CO_(2)驱油效果的差异。实验设定回压分别为14.0 MPa(非混相压力)和19.0 MPa(混相压力)2种注入压力参数,对不同驱替方式驱油效果进行对比。结果显示,非混相条件下CO_(2)驱采收率为53.69%,混相条件下CO_(2)驱采收率为60.55%,混相条件下气水交替驱油采收率最高,达76.56%,为现场CO_(2)驱替提高采收率方式的优选提供了依据。In order to improve the recovery rate of block A in Huabei oilfield and explore the displacement mode by CO_(2)injection,a laboratory test was used to study the difference of CO_(2)displacement effect under different injection pressures.Two back pressure parameters were respectively set as 14.0 MPa(immiscible pressure)and 19.0 MPa(miscible pressure),and the effects of continuous gas flooding and gas-water alternation on recovery were compared under miscible conditions.The results show that the recovery rate of CO_(2)flooding is 53.69%under immiscible condition,60.55%under miscible condition,and 76.56%under miscible pressure.By comparing their different effects,the recovery efficiency of gas-water alternation under miscible condition is the highest,up to 76.56%,which provides a basis for the optimization of on-site CO_(2)displacement EOR.

关 键 词：CO_(2)驱 非混相压力 混相压力 水气交替 采收率 

分 类 号：TE357.42[石油与天然气工程—油气田开发工程]