Synergic effects of dissolved carbon dioxide and an anionic surfactant synthesized from Rapeseed oil on interfacial tension (IFT) reduction, wettability alteration, and oil swelling in the process of chemical water injection into carbonate oil reservoirs

Abstract Surfactants are used in the process of chemical water injection to reduce interfacial tension of water and oil and consequently decrease the capillary pressure in the reservoir. However, other mechanisms such as altering the wettability of the reservoir rock, creating foam and forming a stable emulsion are also other mechanisms of the surfactants flooding. In this study, the effects of three commercially available surfactants, namely AN-120, NX-1510 and TR-880, in different concentrations on interfacial tension of water and oil, the wettability of the reservoir rock and, ultimately, the increase in oil recovery based on pendant drop experiments, contact angle and carbonate core flooding have been investigated. The effects of concentration, temperature, pressure and salinity on the performances of these surfactants have also been shown. The results, in addition to confirming the capability of the surfactants to reduce interfacial tension and altering the wettability to hydrophilicity, show that the TR-880 has the better ability to reduce interfacial tension than AN-120 and NX-1510, and in the alteration of wettability the smallest contact angle was obtained by dissolving 1000 ppm of surfactant NX-1510. Also, the results of interfacial tension tests confirm the better performances of these surfactants in formation salinity and high salinity. Additionally, a total of 72% recovery was achieved with a secondary saline water flooding and flooding with a 1000 ppm of TR-880 surfactant.

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Effects of dissolved binary ionic compounds and different densities of brine on interfacial tension (IFT), wettability alteration, and contact angle in smart water and carbonated smart water injection processes in carbonate oil reservoirs

Journal of Molecular Liquids ◽

10.1016/j.molliq.2017.12.144 ◽

2018 ◽

Vol 254 ◽

pp. 83-92 ◽

Cited By ~ 32

Author(s):

Iman Nowrouzi ◽

Abbas Khaksar Manshad ◽

Amir H. Mohammadi

Keyword(s):

Contact Angle ◽

Interfacial Tension ◽

Water Injection ◽

Oil Reservoirs ◽

Wettability Alteration ◽

Smart Water ◽

Ionic Compounds

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Impact of Dursban and Abate on Microbial Numbers and Some Chemical Properties of Standing Ponds

Water Quality Research Journal ◽

10.2166/wqrj.1975.006 ◽

1975 ◽

Vol 10 (1) ◽

pp. 33-41 ◽

Cited By ~ 3

Author(s):

J. Butcher ◽

M. Boyer ◽

CD. Fowle

Keyword(s):

Carbon Dioxide ◽

Active Ingredient ◽

Algal Blooms ◽

Chemical Properties ◽

Total Carbon ◽

Dissolved Carbon ◽

Photosynthetic Productivity ◽

Dissolved Carbon Dioxide ◽

Microbial Numbers

Abstract Eleven small ponds, lined with polyethylene, were used to assess the consequences of applications of *DursbanR at 0.004, 0.030, 0.100 and 1.000 ppm and AbateR at 0.025 and 0.100 ppm active ingredient. The treated ponds showed a more pronounced long-term increase in pH and dissolved oxygen and decreasing total and dissolved carbon dioxide in comparison with untreated ponds. Algal blooms were of longer duration in treated ponds than in controls. Total photosynthetic productivity was higher in treated ponds but bacterial numbers did not change significantly. Photosynthetic productivity was estimated by following the changes in total carbon dioxide.

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