CAUSES OF SAMOTLOR FIELD WELLS SANDING-UP AND PROCEDURES FOR ITS ELIMINATION

High content of mechanical impurities in well production at Samotlor f ield has been noted for more than twenty years. Lately, this problem h as grown in importance due to the changes in production wells structur e and transfer of production to hard-to-produce reservoirs with discon tinuous and highly discontinuous beds. The results of field studies on the causes of wells sanding-up are analyzed. It is noted, that the la rgest content of mechanical impurities in well production is observed during start-up operations after workovers and at unstable production conditions. The procedures for elimination of negative influence of su ch impurities on the work of well equipment are proposed.