METHOD FOR INSOLUBLE ROCK SEAM BREAKING THROUGH WELL DURING UNDERGROUND RESERVOIR BUILDING IN SOLUBLE ROCK

摘要

FIELD: underground liquid and gas reservoir building in soluble impermeable rock containing alternating soluble and insoluble seams. ^ SUBSTANCE: method involves exposing seam roof and bottom along with creating workings by supplying solvent along one coaxial string and removing brine via another string; applying pressure of overlaying liquid column to exposed seam with the use of isolation partition in annular seam space; creating pressure drop enough for insoluble rock seam breaking in well by injecting liquid in well; forming waterless protective layer under seam bottom after seam roof and bottom exposing by supplying unloading material under seam bottom, wherein the unloading material has density lesser than water density. Waterless protective layer thickness exceeds 0.2 of insoluble rock seam thickness. Isolation partition is made as elastic shell containing filler. ^ EFFECT: increased efficiency of insoluble rock seam treatment. ^ 7 cl, 1 dwg