FIELD: mining.
SUBSTANCE: invention relates to treatment of wells using reagents. Well treatment composite comprising a well treatment agent and calcined porous metal, where porosity and permeability of calcined porous metal oxide is such that well treatment agent is adsorbed into interstitial spaces of porous metal oxide, and further: area of surface of calcined porous metal oxide ranges from about 1 m2/g to about 10 m2/g, particle diameter 0.13 mm and pore volume of said metal oxide from 0.01 to 0.10 cm3/g. In another version well treatment composite, introduced into an underground formation, contains a well treatment reagent and calcined porous metal oxide, where porosity and permeability of said oxide is such that said reagent is absorbed in interstitial spaces of porous aluminium oxide, and reagent is capable of being absorbed at constant rate for a long period of time in formation fluid medium contained in an underground formation. Proppant containing said last composite, where no more than 15 % of proppant is crushed at closure stress of 10,000 pounds per square inch (68.95 MPa), when composite contains 10 wt% of well treatment reagent. Method for treatment of underground formation, permeated with well shaft involves pumping to borehole well treatment fluid containing said composite. Method for stimulation of underground formation involves pumping into formation a well treatment fluid containing said composite. Method for treatment of underground formation involves introduction into underground formation or well bore, penetrating through underground formation, said composite. Method of inhibiting or controlling speed of release of well treatment agent in underground formation or in well bore by introducing into formation or well bore said composite, which after a single treatment has duration of at least six months. Method of limiting inflow of sand in well bore, penetrating through underground formation, involving: introduction into well bore suspension of said composite and fluid carrier, placing composite near underground formation to form a permeable fluid medium seal, which can reduce or almost prevent passage of formation particles from an underground formation into well bore with simultaneous free passage of formation fluids from underground formation into well bore. Invention is developed in depending points of the formula.
EFFECT: high efficiency of processing.
27 cl, 9 ex, 5 tbl, 6 dwg
