METHOD FOR COMPLETION OF WELLS WITH ARTIFICIAL FILTER Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, lowered into productive reservoir is casing string with tail-piece. Performed is direct plugging of this interval by plugging material with permeable passages in stone. Tail-piece is made permeable with components arranged in it in spiral-like succession and with passing of gas but not with passing of liquid. Number of components is determined according to relation: , where n - number of components; k - permissible number of disruptions in tail-piece body made for installing components which pass gas but not pass liquid basing from strength of tail-piece; h - effective capacity of reservoir; R - radius of well in zone of productive reservoir; c - coefficient of imperfection caused due to character of reservoir opening and parameters of reservoir. Plugging of tail-piece interval is performed by material which contains gas-creating additives for example aluminium powder. At moment when plugging material starts hardening, pressure in casing string is reduced. Application of aforesaid method ensures reliability of completing well with artificial filter together with retention of flow capacity of well. EFFECT: higher efficiency. 5 dwg