Thin liquid films in improved oil recovery from low-salinity brine
- Yale Univ., New Haven, CT (United States). Dept. of Chemical and Environmental Engineering; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Yale Univ., New Haven, CT (United States). Dept. of Chemical and Environmental Engineering; Reservoir Engineering Research Inst., Palo Alto, CA (United States)
Low-salinity waterflooding is a relatively new method for improved oil recovery that has generated much interest. It is generally believed that low-salinity brine alters the wettability of oil reservoir rocks towards a wetting state that is optimal for recovery. The mechanism(s) by which the wettability alteration occurs is currently an unsettled issue. This study reviews recent studies on wettability alteration mechanisms that affect the interactions between the brine/oil and brine/rock interfaces of thin brine films that wet the surface of reservoir rocks. Of these mechanisms, we pay particular attention to double-layer expansion, which is closely tied to an increase in the thickness and stability of the thin brine films. Our review examines studies on both sandstones and carbonate rocks. We conclude that the thin-brine-film mechanisms provide a good qualitative, though incomplete, picture of this very complicated problem. Finally, we give suggestions for future studies that may help provide a more quantitative and complete understanding of low-salinity waterflooding.
- Research Organization:
- Yale Univ., New Haven, CT (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1251044
- Alternate ID(s):
- OSTI ID: 1250991
- Report Number(s):
- LLNL-JRNL-666279-DRAFT
- Journal Information:
- Current Opinion in Colloid & Interface Science, Vol. 20, Issue 2; ISSN 1359-0294
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Surfactant-Aided Low-Salinity Waterflooding for Low-Temperature Carbonate Reservoirs
Characterization and Alteration of Wettability States of Alaskan Reserviors to Improve Oil Recovery Efficiency (including the within-scope expansion based on Cyclic Water Injection - a pulsed waterflood for Enhanced Oil Recovery)