METHOD OF FORMATION OF UNDERGROUND RESERVOIRS IN BEDS OF ROCK SALT Russian patent published in 2009 - IPC E21B43/28 

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to process of well development of deposits of rock, potassium and other salts. The method of formation of underground reservoirs in beds of rock salt consists in boring vertical well into a salt deposit, in casing the well, and in equipping the well with concentric arranged brine lifting, water supplying and producing pipes. The method includes supply of solvent under pressure via annular space between the water supplying pipe and the brine lifting pipe, supply of non-solvent under pressure via annular space between the water supplying and producing pipes, formation of development entry, effect onto salt in the upper part of the reservoir along the perimetre with tangentially directed jets of solvent and withdrawal of brine via the brine lifting pipe. After formation of the development entry an additional pipe is introduced into the well; before running into the well the lower end of this pipe is perforated along the length equal to the height of the reservoir; a casing is secured at this section. Further, solvent is supplied into the casing via the gap between the additional and brine lifting pipes. The casing is made out of semi-permeable membrane for direct osmosis. Periodically, solvent at volume of 0.1 from solvent supplied into the reservoir is fed into the casing as the volume of the reservoir increases. Volume of the casing is accepted as equal to 0.9 from reservoir volume.

EFFECT: accelerated building of reservoirs in beds of rock salt.

4 cl, 1 dwg