Migration and Residual Trapping of Immiscible Fluids during Cyclic Injection: Pore-Scale Observation and Quantitative Analysis

Figure 6

Evolution of hexane saturation throughout the five injection cycles. D: drainage, period of hexane injection; I: imbibition, period of deionized water injection. Since the micromodel is always fully saturated with hexane and deionized water, water saturation can be estimated as the complement of hexane saturation.