复杂小断块油藏CO_2驱室内评价研究  

Laboratory Evaluation on CO_2 Flooding for Small Complex Faulted Block Oil Reservoir

作　　者：李立健[1] 孙雷[1] 李华彦[2] 杨彬[1] 李蒙[1] 纪明强 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]中石油华北油田公司采油工程研究院,河北任丘062550

出　　处：《重庆科技学院学报（自然科学版）》2015年第4期17-20,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家重大专项"凝析气藏开发新技术研究"(2011B-1507)

摘　　要：为了分析在F油田实现注CO2驱的可行性,展开PVT及注CO2相态配伍性实验、细管实验及长岩心驱替实验。研究结果表明:CO2能显著改善原油的物性,有效促进增溶、降黏能力;注CO2驱的最小混相压力为21.88 MPa,在当前18.50 MPa的地层压力下,CO2驱能达到近混相驱的效果;4种不同的开采方式下,CO2驱的采出程度最高,气水交替驱和水驱采出程度次之,衰竭式开采效果最差。For the purpose of studying the feasibility of CO2 injection for enhancing oil recovery, PVT and phase compatibility tests of CO2 swelling, slim tube test and long core flooding experiments of different development sce- narios have been conducted. The results have shown that CO2 can significantly improve the properties of the oil es- pecially in swelling the oil and reducing the viscosity and the minimum miscible pressure （MMP） of CO2 injection was 21.88MPa which indicates that under the current reservoir pressure 18.5MPa, near miscible flooding can be a- chieved. Among the four different development scenarios, the highest oil recovery can be reached by CO2 near mis- cible flooding, followed by CO2 alternating water flooding and water flooding, the depletion development has a least recovery rate.

关 键 词：低渗透油藏 CO2膨胀实验 细管实验 CO2驱替实验 室内评价 

分 类 号：P618[天文地球—矿床学]