Summary Low Salinity Waterflood (LSW) is an emerging Enhanced Oil Recovery (EOR)
method that is simple to implement and has been shown to yield substantial increase in oil
recovery over conventional waterflood, especially in oil-wet sandstone reservoirs. The
mechanism for increased oil recovery is a wettability change from oil-wet to water-wet, which
is induced by ion exchange between the injected fluid and the clay surface. This paper
presents the geochemistry that is required to model LSW and a method for shifting the …

After nearly thirty years of research and development, it is now commonly agreed that Low
Salinity Waterflood (LSW) is an attractive enhanced oil recovery (EOR) method because of
its incremental oil recovery performance, reasonable operating cost and low environmental
impact compared to conventional waterflood and other EOR processes. From the past
studies, LSW is known as a process that comprises many mechanisms, ie multiple ion
exchanges, wettability alteration, complex geochemical reactions, and fines migration and …