METHOD OF SECONDARY OPENING OF PRODUCING FORMATION Russian patent published in 2001 - IPC

FIELD: oil-and-gas producing industry, particularly, methods of well perforation for opening of producing formations with slightly cemented reservoirs liable to sand showings. SUBSTANCE: method includes making on strainer side surface of perforated holes closed by destructive plugs. Strainer as a component of casing string is lowered into well and located against producing formation. Well is cemented, plugs are destroyed and formation is operated. Formed additionally against producing formation is fringe from permeable grouting material, and above and below the strainer fringe is formed from grouting material reinforced by dispersion with synthetic fiber subjected to heat treatment to melt synthetic fibers in cement stone and to attain more reliable adhesion of cement stone with string. EFFECT: reliable communication of producing formation with casing string, higher hydrodynamic well perfection coefficient, prevention of formation collapse and sand showing in well, exclusion of interformation overflow of fluids. 2 cl, 1 dwg