In mixed-wet pore networks, incremental oil from low-salinity flooding can only come from oil-wet pores, and improving microscopic sweep in those pores is necessary but not sufficient for extra recovery.
Bernard, Effect of floodwater salinity on recovery of oil from cores containing clays, Paper SPE 1725 presented at the 38th SPE California Regional Meeting, Los Angeles (1967)
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A Mechanistic Pore-Scale Analysis of the Low-Salinity Effect in Heterogeneously Wetted Porous Media
In mixed-wet pore networks, incremental oil from low-salinity flooding can only come from oil-wet pores, and improving microscopic sweep in those pores is necessary but not sufficient for extra recovery.