Rheological Behaviors of Crude Oil in the Presence of Water

Authors: Madjid Meriem-Benziane, Hamou Zahloul

Abstract:

The rheological properties of light crude oil and its mixture with water were investigated experimentally. These rheological properties include steady flow behavior, yield stress, transient flow behavior, and viscoelastic behavior. A RheoStress RS600 rheometer was employed in all of the rheological examination tests. The light crude oil exhibits a Newtonian and for emulsion exhibits a non-Newtonian shear thinning behavior over the examined shear rate range of 0.1–120 s-1. In first time, a series of samples of crude oil from the Algerian Sahara has been tested and the results expressed in terms of τ=f(γ) have demonstrated their Newtonian character for the temperature included in [20°C, 70°C]. In second time and at T=20°C, the oil-water emulsions (30%, 50% and 70%) by volume of water), thermodynamically stable, have demonstrated a non-Newtonian rheological behavior that is to say, Herschel-Bulkley and Bingham types. For each type of crude oil-water emulsion, the rheological parameters are calculated by numerical treatment of results.

Keywords: Crude oil Algerian, Emulsion, Newtonian, Non- Newtonian, viscosity.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1329577

References:

[1] Christophe Dicharry, David Arla, Anne Sinquin, Alain Gracia, Patrick Bouriat. (2006), "Stability of water/crude oil emulsions based on interfacial dilatational rheology," Journal of Colloid and Interface Science, 297(2), 785-791.
[2] Farah M. A., Oliveira R. C., Caldas J. N., Rajagopal K., "Viscosity of water-in-oil emulsions: Variation with temperature and water volume fraction, " Journal of Petroleum Science and Engineering, 48(3-4), (2005)169-184.
[3] Cambiell José M. Benito, Carmen Pazos, José Coca, "Interfacial properties of oil-in-water emulsions designed to be used as metalworking fluids," Colloids and Surfaces A: Physicochem. Eng. Aspects, 305(2), (2007)112-119.
[4] Jixiang Guo, Qing Liu, Mingyuan Li, Zhaoliang Wu, Alfred A. Christy. "The effect of alkali on crude oil/water interfacial properties and the stability of crude oil emulsions," Colloids and Surfaces A: Physicochem. Eng. Aspects, 273 (1-3), (2006), 213-218
[5] D. Langevin, S. Poteau, I. Hénaut and J.F. Argillier. "Crude Oil Emulsion Properties and their Application to Heavy Oil Transportation," Oil & Gas Science and Technology - Rev. IFP, 59(5), (2004), 511-52 J.A.P. Coutinho, A thermodynamic model to predict wax formation in petroleum fluids, Braz. J. Chem. Eng. 18 (2001) 411-422.
[6] Gonglun Chen, Daniel Tao. "An experimental study of stability of oil- water emulsion," Fuel Processing Technology 86(5) (2005), pp. 499- 508.
[7] Yanru Fan, Sébastien Simon, Johan Sjöblom. "Aspects Interfacial shear rheology of asphaltenes at oil-water interface and its relation to emulsion stability: Influence of concentration, solvent aromaticity and non-ionic surfactant," Colloids and Surfaces A: Physicochem. Eng. Aspects, 366(1-3), 1(2010), 20-128
[8] Djabourov M., Volle J-L., Lechaire J-P., Frebourg G. "Morphology of paraffin crystals in waxy crude oils cooled in quiescent conditions and under flow, " Fuel, 82(2), (2003), 127-135.