Emulsions are formed naturally in the reservoirs and during oil exploration, and the surfactants primarily present in heavy oil, helps its stabilization. The high viscosity of heavy oil generates greater difficulty on the operation, so the knowledge of the emulsion formed with this kind of oil reduces its cost of production. The type of emulsion formed, the droplet size and its distribution affect the rheology of the emulsion. in this work, emulsions were created with a Newtonian synthetic oil whose viscosity is close to the one of a heavy oil. The water employed in the emulsion preparation was deionized and contained different surfactants. Rheological characterizations were performed at 10 degrees Celcius in most cases, and included small-amplitude oscillatory tests, steady-state flow tests and creep tests. All emulsions were oil-in-water, and were composed of 80 per cent of oil. The water droplet size was about 10 microns. The emulsions exhibited a predominantly elastic behavior in the linear viscoelastic regime. The steady-state flow test results showed that the emulsions possess tests and the results showed that the emulsion viscosity is well described by the Herschel-Bulkley model. Some tests were also done at 4 degrees Celcius, to investigate the influence of temperature on viscosity, but no significant change was found. Finally, creep tests were performed to determine the yield stress of the emulsions.