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270                            Enhanced Oil Recovery in Shale and Tight Reservoirs
























































          Figure 9.36 Normalized imbibed oil and brine volumes versus dimensionless time for
          intact Montney samples (Lan et al., 2015b).

             Javaheri et al. (2017) did four different types of experiments: (1) a liquid
          contact angle measured on a system of air-liquid-flat surface system (air-
          liquid contact angle); (2) a water contact angle measured on a system of
          water-oil-flat surface system or an oil contact angle measured in a system
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