Abstract

Water-in-oil emulsion systems are the prospective makeup for a reservoir drilling and well killing at a fluid placement technology. Along with their rheological properties the success of the application is due to the dynamic blocking phenomenon consisting in ceasing in time of emulsion flow in capillary structures and fissures in spite of operating constant pressure drop. The phenomenon shows the essential emulsion feature; it can be used as a colmatage fluid. The easiest way to test emulsion for blocking occurring is to organize a flow in cylindrical microchannels. The study of rheological properties and emulsion flow features in microchannels allows clarifying emulsion characteristics which are helpful for their using as drilling muds.

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