MAINTENANCE OF FILTRATION AND CAPACITIVE RESERVOIR PROPERTIES DURING TEMPORARY ISOLATION

The article provides the analysis of factors affecting the reservoir properties (filtration and capacity) during repair works. It is revealed that the maintenance of filtration and capacitive reservoir properties is ensured by high-quality blocking and unblocking the reservoir, as well as by prevention of clay material swelling. Solution of these problems is possible through proper selection of the bridging agents (nature, type and fractional composition) used in the blocking composition, and various functional additives (salts, polymeric reagents and surfactants). Furthermore, the reasons of clay minerals swelling and various ways to prevent this process are analyzed. It is determined the peculiarities of clay minerals structure are essential for their properties, and in particular, their ability to swell.