Experimental investigation of different brines imbibition influences on co-and counter-current oil flows in carbonate reservoirs

作     者：Pouyan Ahmadi Mohammad Reza Aghajanzadeh Masoud Riazi Mohammad Reza Malayeri Mohammad Sharifi Pouyan Ahmadi;Mohammad Reza Aghajanzadeh;Masoud Riazi;Mohammad Reza Malayeri;Mohammad Sharifi

作者机构：Enhanced Oil Recovery(EOR)Research CentreIOR/EOR Research InstituteShiraz UniversityShirazIran Helmholtz Centre for Environmental Research-UFZLeipzigGermany Department of Petroleum EngineeringAmirkabir University of TechnologyTehranIran Institut für Verfahrenstechnik und UmwelttechnikTechnische Universität DresdenGermany 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第5期

页      面：17-29页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

主　　题：Smart water Co-current Counter current Wettability alteration Oil recovery 

摘      要：Imbibition of water,as wetting phase in oil-wet fractured carbonate reservoirs,plays a key role in fluid flow between matrix and fracture *** type of injected seawater and its chemistry would profoundly influence the imbibition *** this study,the impact of smart water(a brine that its ions have been adjusted to facilitate oil recovery)and low salinity water on co-and counter-current imbibition processes for oil-wet carbonate cores has been experimentally *** results show an increase of about 10% in oil recovery for co-and counter-currents for smart seawater imbibition compared to that of low salinity *** addition,as a result of the influence of co-and counter-current on each other,by co-current removal from one core face,the countercurrent in the other face would be intensified by as much as about 75%.A close examination of different lengths(5,7 and 9 cm)of carbonate cores with the same permeability revealed that by decreasing porous medium length,the amount of counter-current producing oil would be decreased so that in the 5 cm core,counter current oil production will not *** similar core lengths by increasing permeability,the share of counter current flow would be decreased approximately 18% since the capillary pressure could not overcome non-wetting phase viscous *** the role of matrix length along with a modified brine(which is designed according to the matrix mixture)strengthen the relevant mechanisms to have more oil production so that the higher thickness of matrix causes the higher amount of co-current oil producing and consequently more total recovery.