Oil-water interactions for a crude oil system are observed to be quite different from an idealized fluid system, due to the surfactants present in the crude oil. The presented work includes results from inclined three-phase flow of crude oil together with gas and saline water. Parameters, such as flow pattern, liquid hold-up and pressure drop are investigated at inclinations ranging from −6° to +10° and compared with model predictions using the OLGA2000 steady state code, OLGAS (version 3.02). Results from the model comparison indicate that the model under-predicts both water accumulation and frictional pressure drop, particularly at high inclinations.

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