Rheological Characterization of Algerian Crude Oil and Emulsions Water / Oil
Abstract
In this paper,a finerheological characterizationwas performed forfive types ofcrude oil from theAlgerianSaharaand severalwater / oilemulsions.
This studyallows us to obtain moreknowledge aboutthe rheological behaviorof these samples andprovides us with information ontheirstorageandtransport inpipes.Three qualitiesof water wereused, seawater, drinking water andgroundwater sources.
Thetests were carried outat a temperature of23°C usinga sophisticatedrheometerwithcone-plategeometry(the RS600RheoStress from ThermoHaake). The perturbing effectssuch assliding, evaporation, fracturing and diggingwere well controlled.
The study shows thatthe rheological behaviorof the fivetypes of crude oilisNewtonian, however, thatemulsionsofvolume concentrationsof30%, 50% and70% ofwaterisnon-Newtonian withtheexistence ofathresholdconstraint.
TheBingham, Herschel-BulkleyandostwaldDe Waele modelswere used andadjustedso to correctly representthe rheological behaviorof these materials.
Keywords:
Oil,Oil-wateremulsions, Rheological behavior, Stresslevel, Shear stress, Shear rate.
