Over the life of an oil well, oil production can vary significantly. The production that initially mostly composed of petroleum eventually becomes a combination of water and oil, causing the occurrence of emulsions in the system. The presence of these emulsions becomes a recurring problem for the oil industry as they lead to increase in transportation and oil processing costs. Verification of the primary separation efficiency of emulsions usually occurs with the use of emulsions taken from the field. However, such emulsions are fluids that may exhibit toxic, volatile and flammable behaviors [1]. In addition, the measurement of separation efficiency technologies is typically not reliable due to an extreme difficulty in obtaining repeatability of emulsions synthesized from crude oil, which induces the need to use model fluids whose behavior is similar to petroleum. The general objective of this work is to deepen the study of petroleum emulsions and develop a method for the synthesis of working fluids with rheological characteristics, formation and stability similar to those of real oils and emulsions found in the field. Therefore, for the development of this work, model oils with macroscopic characteristics very close to two different crude oils (A and B) were synthetized. It was found that model emulsions possessed very similar behavior of A-oil emulsions. However, model emulsions showed shear thinning phenomenon in the semi-diluted regime, probably due to qualitative differences between the indigenous surfactants of real emulsions and commercial surfactants used in model emulsions.