Enhanced oil recovery from carbonate reservoirs by spontaneous imbibition of low salinity water
投稿时间:2017-11-15  
英文关键词:Enhanced oil recovery, Spontaneous imbibition, Low salinity water, Wettability alteration, Carbonate rocks
基金项目:The authors acknowledge the National Iranian South Oil Company (NISOC) for generously funding the project as well as granting the permission to publish this paper. All the experimental works have been conducted in the Chemical Engineering Department at the Isfahan University of Technology, Isfahan, Iran.
作者单位
Mohammad Reza Zaeri Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran 
Rohallah Hashemi Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran 
Hamidreza Shahverdi Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran 
Mehdi Sadeghi Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran 
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英文摘要:
      An experimental study was performed to investigate the impact of low salinity water on wettability alteration in carbonate core samples from southern Iranian reservoirs by spontaneous imbibition. In this paper, the effect of temperature, salinity, permeability and connate water were investigated by comparing the produced hydrocarbon curves. Contact angle measurements were taken to confirm the alteration of surface wettability of porous media. Oil recovery was enhanced by increasing the dilution ratio of sea water, and there existed an optimum dilution ratio at which the highest oil recovery was achieved. In addition, temperature had a very significant impact on oil recovery from carbonate rocks. Furthermore, oil recovery from a spontaneous imbibition process was directly proportional to the permeability of the core samples. The presence of connate water saturation inside the porous media facilitated oil production significantly. Also, the oil recovery from porous media was highly dependent on ion repulsion/attraction activity of the rock surface which directly impacts on the wettability conditions. Finally, the highest ion attraction percentage was measured for sodium while there was no significant change in pH for all experiments.
Mohammad Reza Zaeri,Rohallah Hashemi,Hamidreza Shahverdi,Mehdi Sadeghi,2018.Enhanced oil recovery from carbonate reservoirs by spontaneous imbibition of low salinity water.Petroleum Science,(3):564~576.
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