COMPOUND FOR REDUCING PERMEABILITY OF HIGHLY PERMEABLE ZONES OR FISSURES IN BED Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: this compound can also be used for isolating inflow of brine water to producing wells. Improved operating efficiency of compound is achieved due to its composition which represents suspension of solid particles of definite size in liquid. Used as solid particles are husks of buckwheat with particle size of 0.0001-7 mm and their concentration in suspension being equal to 0.01-10%. Amount of suspension to be injected into well is 0.1-40% of volume of oil bed being treated and it is monitored during injection process according to filtration resistance. Application of aforesaid compound is aimed at levelling permeability of nonuniform oil bed at low expenditure and without any harm to ecology. EFFECT: higher efficiency.