"Low salinity water injection has been identified with high technical EOR-potential on the Norwegian Continental Shelf (NCS). Low salinity or Smart Water injection are environmentally friendly methods that can alter wettability of the reservoir to more water-wet causing increased oil production compared to injecting formation water/produced water. The wettability alteration potential is dependent on the initial wettability of the reservoir, which is dictated by interactions between crude oil, brine and rock.
Experimental coreflooding and spontaneous imbibition studies have been performed on outcrop sandstone, and low salinity water injection has shown very promising oil recovery results compared to injecting formation water or seawater. Oil recovery tests on three high temperature oil reservoirs on the NCS have confirmed the outcrop results. In all three reservoir systems tested low salinity water injection resulted in the highest oil recovery. The results also clearly indicated that seawater injection is not the optimal injection strategy for a sandstone reservoir, as significantly higher oil production was achieved by low salinity water injection. It has been concluded that laboratory tests show great economic, environmental and production potential by low salinity water injection in sandstone reservoirs."
Tina Puntervold is Associate Professor at the Department of Energy Resources at The University of Stavanger, Norway. She is currently also Assistant Director of The National IOR Centre of Norway, and until recently she served as Associate Editor of Elsevier’s Journal of Petroleum Science and Engineering. Tina has a PhD in Petroleum Engineering from 2008, and a MSc in Physical Chemistry. Before joining academia she worked as field engineer for Schlumberger.
Experimental coreflooding and spontaneous imbibition studies have been performed on outcrop sandstone, and low salinity water injection has shown very promising oil recovery results compared to injecting formation water or seawater. Oil recovery tests on three high temperature oil reservoirs on the NCS have confirmed the outcrop results. In all three reservoir systems tested low salinity water injection resulted in the highest oil recovery. The results also clearly indicated that seawater injection is not the optimal injection strategy for a sandstone reservoir, as significantly higher oil production was achieved by low salinity water injection. It has been concluded that laboratory tests show great economic, environmental and production potential by low salinity water injection in sandstone reservoirs."
Tina Puntervold is Associate Professor at the Department of Energy Resources at The University of Stavanger, Norway. She is currently also Assistant Director of The National IOR Centre of Norway, and until recently she served as Associate Editor of Elsevier’s Journal of Petroleum Science and Engineering. Tina has a PhD in Petroleum Engineering from 2008, and a MSc in Physical Chemistry. Before joining academia she worked as field engineer for Schlumberger.
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