METHOD FOR CREATING UNDERGROUND RESERVOIRS IN ROCK-SALT FORMATIONS Russian patent published in 2004 - IPC

FIELD: mining industry.

SUBSTANCE: method includes drilling vertical well in salt deposit, casing of well, equipping well with concentrically placed brine-hoisting, water-feeding and operation pipes, feeding of dissolvent along inter-pipe space between water-feeding and brine-hoisting pipes. Along inter-pipe space between water-feeding and operation pipes a non-dissolvent is fed under pressure, preparatory mine is formed, salt in upper portion of reservoir is effected along perimeter by tangentially directed dissolvent jets and brine is extracted through brine-hoisting pipe. After forming of preparatory mine additional pipe is inserted into the well, lower end of which before lowering into mine is perforated along the length equal to reservoir height, and an elastic sealed cover is fixed on that portion. After that along the space between additional and brine-hoisting pipe into elastic sealed cover dissolvent is fed in volume equal to amount of extracted salt. Maximum volume of elastic sealed cover is selected equal to projected volume of reservoir.

EFFECT: faster process of underground reservoirs construction, higher speed of wall-adjacent flows, lower energy costs due to lesser number of saturation cycles.

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