Abstract
The effect of surfactant concentration on the occurrence and detection of transient ultralow interfacial tension (IFT) between crude oil and formation water at 75 °C has been investigated using a series of novel sodium alkyl ether sulfonates having various increasing molecular weights and degrees of ethoxylation. All surfactant systems displayed dynamic interfacial tension (DIT). Transient ultralow DIT (DITmin) were detected only within an intermediate surfactant concentration. This behavior was attributed to an implicit concentration-related length scale required for the added surfactant to diffuse from the bulk phase to the freshly prepared oil–water interface. In the high surfactant concentration range, this length scale is relatively short and results in an instantaneous (and undetectable) occurrence of DITmim in a relatively very short time scale, well beyond the detection limit of the spinning drop tensiometer (~2–3 min). Interestingly, DITmin were detected only in systems above the surfactant’s critical micelle concentration, suggesting that DITmin occurs as a result of the diffusion (subsequent to the adsorption) of the oil acidic species from the interface to the bulk phase to form mixed micelles with the added surfactant. Measurements of DITs in the presence of decane showed no evidence for DITmin, confirming the general belief that DITmin is indeed due to the interaction of the added surfactant with the oil acidic components. Finally, the effect of surfactant concentration on the equilibrium IFT (γeq) showed evidence for relatively low values (~10−2 mNm−1) for some surfactant systems.
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References
McCaffery FG (1976) Interfacial tension and aging behavior of some crude oils against caustic solutions. J Can Pet Technol 15(3):71
Taylor KC, Hawkins BF, Islam MR (1990) Dynamic interfacial tension in surfactant-enhanced alkaline flooding. J Can Pet Technol 29:50
Taylor KC, Schramm LL (1990) Measurement of short-term low dynamic interfacial tensions: application to surfactant enhanced alkaline flooding in enhanced oil recovery. Colloids Surf 47:245
Gong H, Xin X, Xu G, Wang Y (2008) The dynamic interfacial tension between HPAM/C17H33COONa mixed solution and crude oil in the presence of sodium halide. Colloids Surf A Physicochem Eng Asp 317(1–3):522
Chen CM, Chang CH, Yang YM, Maa JR (2000) Comparisons of the effects of pH on the interfacial tension-lowering activity of surfactants Triton X-100 and Triton SP-190. Colloids Surf A Physicochem Eng Asp 174(30):357
Nasr El-Din HA, Taylor KC (1992) Dynamic interfacial tension of crude oil/alkali/surfactant systems. Colloids Surf 66:23
Rudin J, Wasan DT (1992) Mechanisms for lowering of interfacial tension in alkali/acidic oil systems. Ind Eng Chem Res 32:23
Rudin J, Bernard C, Wasan DT (1994) Effect of added surfactant on interfacial tension and spontaneous emulsification in alkali/acidic oil systems. Ind Eng Chem Res 33:1150
Chartterjee J, Nicholow A, Wasan TD (1998) Measurements of ultralow interfacial tension with application to surfactant-enhanced alkaline systems. Ind Eng Chem Res 37:61
Zhao Z, Li Z, Qiao W, Cheng L (2005) Dynamic interfacial behavior between crude oil and octylmethylnaphthalene sulfonate surfactant flooding systems . Colloids Surf A Physicochem Eng Asp 259:71
Zhao Z, Liu F, Li Z, Qiao W, Cheng L (2006) Dynamic interfacial tension between crude oil and novel surfactant flooding systems. Pet Sci Technol 24(12):1469
Zhao Z, Li Z, Qiao W, Cheng L (2006) Dynamic interfacial tension between crude oil and octylmethylnaphthalene sulfonate. Energy Sources Part A: Recover Util Environ Eff 28(15):1397
Zhao Z, Li Z, Qiao W, Cheng L (2006) Novel alkyl methylnaphthalene sulfonate surfactants: a good candidate for enhanced oil recovery. Fuel 85(12–13):1815
Aoudia M, Al-Shibly M, Al-Kasimi L, Al-Maamari R, Al-Bemani AS (2006) Novel surfactants for ultralow interfacial tension in a wide range of surfactant concentration and temperature. J Surf Deterg 9(3):287
Ferri JK, Stebe KJ (2000) Which surfactants reduce tension faster? A scaling argument for diffusion-controlled adsorption. Adv Colloid Interface Sci 85(1):61
Dicharry C, Aria S, Graciaa A, Bouriat P (2006) Stability of water/crude oil emulsions based on interfacial dilatational rheology. J Colloid Interface Sci 297(2):785
Berger PD, Berger CH, Hsu O, Cao G (2009) US Patent 7,629,299, 8 Dec 2009
Arandia, MA, Forgiarini, AM, Salager JL (2010) Resolving an enhanced oil recovery challenge: optimum formulation of a surfactant-oil-water system made insensitive to dilution. J Surf Deterg published on web doi 10.1007/s11743-009-1171-1
Rosen JD (1989) Surfactants and interfacial phenomena, 2nd edn. Wiley, New York
Rosen JR, Wang H, Shen P, Zhu Y (2005) Ultralow interfacial tension for enhanced oil recovery at very low surfactant concentration. Langmuir 21:3749
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This work was financially supported by a grant from his Majesty Sultan Qaboos, Sultanate of Oman (SR/SCI/CHEM/04/01).
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Aoudia, M., Al-Harthi, Z., Al-Maamari, R.S. et al. Novel Alkyl Ether Sulfonates for High Salinity Reservoir: Effect of Concentration on Transient Ultralow Interfacial Tension at the Oil–Water Interface. J Surfact Deterg 13, 233–242 (2010). https://doi.org/10.1007/s11743-010-1182-y
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DOI: https://doi.org/10.1007/s11743-010-1182-y