Petroleum Science >2018,??Issue 3:??564-576 DOI: https://doi.org/10.1007/s12182-018-0234-1
Enhanced oil recovery from carbonate reservoirs by spontaneous imbibition of low salinity water Open?Access
文章信息
作者：Mohammad Reza Zaeri, Rohallah Hashemi, Hamidreza Shahverdi and Mehdi Sadeghi
作者單位：
Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran,Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran,Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran and Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran
投稿時間：2017-11-15
引用方式：Zaeri, M.R., Hashemi, R., Shahverdi, H. et al. Pet. Sci. (2018) 15: 564. https://doi.org/10.1007/s12182-018-0234-1
文章摘要
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.
關鍵詞
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Enhanced oil recovery, Spontaneous imbibition, Low salinity water, Wettability alteration, Carbonate rocks