PROCESS OF ISOLATION OF INFLOW OF STRATAL WATER Russian patent published in 2002 - IPC

FIELD: development of oil and gas fields. SUBSTANCE: process includes of sinking of tubing string with packer into well. Packer is set above water exhibiting portion of pool. Then blocking and grouting compositions are fed into well in sequence. Compositions are pumped through tubing string when hole clearance is open. In this case packer is transportation position. Compositions are fed till their separation boundary appears to be opposite packer. Well fluid is driven through hole clearance to well-head. Remaining portion of blocking composition is fed through hole clearance. Grouting solution is used as last portion of blocking solution. Chemically destroyed component is present in composition of this solution. Then packer is set in working position. Grouting composition and blocking compositions are pumped simultaneously. Grouting composition is pumped through tubing string into water exhibiting portion of pool. Blocking composition is injected through hole clearance into productive portion of pool. Radii of zones formed by pumped compositions are kept same. EFFECT: good plugging up of water exhibiting portion of pool with simultaneous fixing of its productive portion. 3 dwg