scholarly journals Low salinity waterflooding EOR laboratory test using a carbonate rock

2016 ◽  
Vol 81 (6) ◽  
pp. 489-494
Author(s):  
Takaaki Uetani ◽  
Katsumo Takabayashi ◽  
Hiromi Kaido ◽  
Hideharu Yonebayashi
Keyword(s):  
Laboratory Test ◽  
Carbonate Rock ◽  
Low Salinity ◽  
Low Salinity Waterflooding

scholarly journals Pore-scale imaging and analysis of low salinity waterflooding in a heterogeneous carbonate rock at reservoir conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ahmed M. Selem ◽  
Nicolas Agenet ◽  
Ying Gao ◽  
Ali Q. Raeini ◽  
Martin J. Blunt ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Carbonate Rock ◽  
Pore Space ◽  
Contact Angles ◽  
Fluid Distribution ◽  
Pore Scale ◽  
Low Salinity ◽  
Low Salinity Waterflooding ◽  
Capillary Pressures ◽  
Micro Tomography

AbstractX-ray micro-tomography combined with a high-pressure high-temperature flow apparatus and advanced image analysis techniques were used to image and study fluid distribution, wetting states and oil recovery during low salinity waterflooding (LSW) in a complex carbonate rock at subsurface conditions. The sample, aged with crude oil, was flooded with low salinity brine with a series of increasing flow rates, eventually recovering 85% of the oil initially in place in the resolved porosity. The pore and throat occupancy analysis revealed a change in fluid distribution in the pore space for different injection rates. Low salinity brine initially invaded large pores, consistent with displacement in an oil-wet rock. However, as more brine was injected, a redistribution of fluids was observed; smaller pores and throats were invaded by brine and the displaced oil moved into larger pore elements. Furthermore, in situ contact angles and curvatures of oil–brine interfaces were measured to characterize wettability changes within the pore space and calculate capillary pressure. Contact angles, mean curvatures and capillary pressures all showed a shift from weakly oil-wet towards a mixed-wet state as more pore volumes of low salinity brine were injected into the sample. Overall, this study establishes a methodology to characterize and quantify wettability changes at the pore scale which appears to be the dominant mechanism for oil recovery by LSW.

A Sensitivity Study on Low Salinity Waterflooding

2017 ◽  
Vol 04 (03) ◽  
pp. 231-236 ◽  
Author(s):  
Barham S. Mahmood ◽  
Jagar Ali ◽  
Shirzad B. Nazhat ◽  
David Devlin
Keyword(s):  
Sensitivity Study ◽  
Low Salinity ◽  
Low Salinity Waterflooding

Kinetics of the Low Salinity Waterflooding Effect Studied in a Model System

2013 ◽  
Author(s):  
Hassan Mahani ◽  
Steffen Berg ◽  
Denis Ilic ◽  
Willem-Bart Bartels ◽  
Vahid Joekar-Niasar
Keyword(s):  
Model System ◽  
Low Salinity ◽  
Low Salinity Waterflooding ◽  
Kinetics Of
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