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Experimental and modeling study of wettability alteration through seawater injection in limestone: a case study
, Article Petroleum Science ; Volume 17, Issue 3 , 2020 , Pages 749-758 ; Zahedzadeh, M ; Roayaei, E ; Aminnaji, M ; Fazeli, H ; Sharif University of Technology
China University of Petroleum Beijing
2020
Abstract
Water flooding is widely applied for pressure maintenance or increasing the oil recovery of reservoirs. The heterogeneity and wettability of formation rocks strongly affect the oil recovery efficiency in carbonate reservoirs. During seawater injection in carbonate formations, the interactions between potential seawater ions and the carbonate rock at a high temperature can alter the wettability to a more water-wet condition. This paper studies the wettability of one of the Iranian carbonate reservoirs which has been under Persian Gulf seawater injection for more than 10 years. The wettability of the rock is determined by indirect contact angle measurement using Rise in Core technique....