![]() ![]() The stabilities in the OHMSETT tank lagged the laboratory ones in time, however by about 24 hr, similar stabilities were achieved. With the exception of the Arabian crude oils nearly identical water-in-oil states possessing similar stabilities were produced in similar times. ![]() The energy levels between the laboratory mixing experiments and the OHMSETT were similar. The conditions for emulsion formation were analogous in the OHMSETT tank and in the laboratory tests. ![]() Studies carried out to determine the stability of water-in-oil emulsions in the OHMSETT tank facility were examined and compared with laboratory results. Emulsions change the properties and chacteristics of oil spills to a very large degree. A prediction scheme is given to estimate the water content and viscosity of the resulting water-in-oil state and the time to formation with input of wave-height.Įmulsions are sometimes called mousse by oil spill workers. The density, viscosity, saturate, asphaltene and resin contents are used to compute a class index which yields either an unstable or entrained water-in-oil state or a meso-stable or stable emulsion. In this paper a new numerical modelling scheme is proposed and is based on empirical data and the corresponding physical knowledge of emulsion formation. Water-in-oil emulsions made from crude oils have different classes of stability as a result of the asphaltene and resin contents, as well as differences in the viscosity of the starting oil. These states were established according to lifetime, visual appearance, complex modulus, and differences in viscosity. Only stable and mesostable states can be characterized as emulsions. Water-in-oil mixtures were grouped into four states or classes: stable, mesostable, unstable, and entrained water. ![]()
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