Novel surfactants for ultralow interfacial tension in a wide range of surfactant concentration and temperature
Tóm tắt
This work investigates the possibility of injecting dilute aqueous solutions of novel surfactants into the Yibal field (Sultanate of Oman). This was accomplished through an experimental protocol based on the following criteria: (i) compatibility of the surfactants with the high-saline reservoir water (∼200 g/L); (ii) low interfacial tension (IFT) between crude oil and reservoir water (less than 10−2 mN m−1); and (iii) maintaining the low IFT behaviour during the entire surfactant flooding. Novel surfactants selected in this study consist of a series of ether sulfonates (AES-205, AES-128, AES-506, and 7–58) and an amphoteric surfactant (6–105). These surfactants were found to be compatible with reservoir water up to 0.1% surfactant concentration, whereas 6–105 and 7–58 showed compatibility within the full range of surfactant concentration investigated (0.001–0.5%). All surfactant systems displayed dynamic IFT behavior, in which ultralow transient minima were observed in the range 10−4–10−3 mN m−1, followed by an increase in the IFT to equilibrium values in the range 10−3–10−1 mN m−1. The results also showed that with respect to concentration (0.05–0.5%) and temperature (45–80°C), AES-205 and 7–58 surfactants exhibit a wide range of applicability, with the IFT remaining below 10−2 mN m−1, as required for substantial residual oil recovery. In addition, ultralow IFT were obtained at surfactant concentrations as low as 0.001%, making the use of these surfactants in enhanced oil recovery extremely cost-effective.
Tài liệu tham khảo
Rosen, M.J., H. Wang, P. Shen, and Y. Zhu, Ultralow Interfacial Tension for Enhanced Oil Recovery at Very Low Surfactant Concentration, Langmuir 21:3479 (2005).
Al-Ashraf, T., A. Ahmed, and E.A. Suttar, Producing Ultralow Interfacial Tension at the Oil-Water Interface, Pet. Sci. Technol. 20:773 (2002).
Jennings, H.T., C.E. Johnson, and C.D. McAuliffe, A Caustic Water Flooding Process for Heavy Oils, J. Pet. Technol. 26:1344 (1974).
Cooke, C.E., R.E. Williams, and A. Kolodzie, Oil Recovery by Alkaline Waterflooding, J. Pet. Technol. 26:1365 (1974).
Dranchuk, P.M., J.D. Scott, and D.L. Flock, Effect of the Addition of Chemicalson Oil Recovery During Water Flooding, J. Can. Pet. Technol. 13:1 (1974).
Wang, W., Y. Liu, and Y. Gu, Application of a Novel Polymer System in Chemical Enhanced Oil Recovery, Colloid Polym. Sci. 281:1046 (2003).
Abe, M., Microemulsions in Enhanced Oil Recovery: Middle Phase Microemulsion Formation with Some Typical Anionic Surfactants, Surfactant Sci. Ser. 66:279 (1977).
Miller, C.A., and S. Qutubiddin, Enhanced Oil Recovery with Microemulsions, Surfactant Sci. Ser. 21:117 (1987).
Al-Hashim, H.S., V. Obiora, H.Y. Al-Yousef, F. Fernandez, and W. Nofal, Alkaline Surfactant Polymer Formulation for Carbonate Researvoirs, Pet. Sci. Technol. 23:723 (2005).
Thomas, S., and S.M. Farouk Ali, Micellar Flooding and ASP-Chemical Methods for Enhanced Oil Recovery, J. Can. Pet. Technol. 40:46 (2001).
Baghdadi, T., A. Al-Bemani, F. Boukhadi, and R. Al-Maamari, A Laboratory Feasibility Study of Dilute Surfactant Injection for the Yibal Field, SPE Paper 78352, 13th European Petroleum Conference, Aberdeen, Scotland, 2000, p. 1.
Cayias, J.J., R.S. Schechter, and E.H. Wade, The Measurement of Low Interfacial Tension via the Spinning Drop Technique, Adsorption at Interfaces, 8th ACS Symposium Series, 1975, p. 234.
Zhao, Z., Z. Li, W. Qiao, and L. Cheng, Dynamic Interfacial Behavior Between Crude Oil and Octylmethylnaphthalene Sulfonate Surfactant Flooding System, Colloids Surf. A 259:71 (2005).
Clint, J.H., E.L. Neustadter, and P.A. Wheeler, Interaction of Enhanced Oil Recovery Surfactants with Model Crude Oil Surfactants, Colloids Surf. 11:129 (1984).
Taylor, K.C., and L.L. Schramm, Measurements of Short-Lived Dynamic Interfacial Tensions: Application to Surfactant Enhanced Alkaline Flooding in Enhanced Oil Recovery, Colloids Surf. 47:245 (1990).
Touhami, Y., V. Hornof, and G.H. Neale, Dynamic Interfacial Tension Behavior of Acidified Oil/Surfactant-Enhanced Alkaline Systems. 2. Theoretical Studies, Colloids Surf. A 132:61 (1998).
Rudin, J., and D.T. Wasan, Mechanisms for Lowering of Interfacial Tension in Alkali/Acidic Oil Systems, Ind. Eng. Chem. Res. 31:1899 (1992).
Rudin, J., C. Bernard, and D.T. Wasan, Effect of Added Surfactant on Interfacial Tension and Spontaneous Emulsification in Alkali/Acidic Oil Systems, Ind. Eng. Chem. Res. 33:1150 (1994).
Taylor, K.C., B.F. Hawkins, and M.R. Islam, Dynamic Interfacial Tension in Surfactant Enhanced Alkaline Flooding, J. Can. Pet. Technol. 29:50 (1990).
El-Batononey, M., Th. Abdel-Moghny, and M. Ramzi, The Effect of Mixed Surfactants on Enhanced Oil Recovery, J. Surfact. Deterg. 2:201 (1999).
Askinat, A.M., Surfactants for Enhanced Oil Recovery Processes in High Salinity Systems—Product Selection and Evaluation, in Proceeding of the 3rd European Symposium on Enhanced Oil Recovery, edited by F.J. Fayers, New York, 1981, p. 43.