Of late there is a sharp increase in the area of oil field development that contains the reserves due to several reasons referred to as hard-to-recover ones.

In this connection there is expediency in conducting severe studies, both from the standpoint of geological conditions of their formation and from the standpoint of the reservoir and its fluids.

One of the major objectives while performing viscous and wax field development program that are characterized by abnormally high temperature of solidification is the performance of studies related to rheological properties of water/oil emulsions during the process of their dehydration and their further transportation in a mixture with other types of recovered products.

The recently published materials on rheology of water/oil emulsions are mainly based on system modeling that uses distilled water and what is more important, within the frames of negative oil solidification temperature range [1]. On the other hand, the requirements towards the quality of preliminary dehydration are usually governed inside a wide interval (up to 10-20 of %) of residual water contents and cannot serve as a benchmark to select the degree of well product dehydration in specific cases.

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