selective positioning of a material reducing the permeability to inhibit fluid communication between an interval close to a drill hole and an underlying layer aquifere

摘要

the present invention is the inhibition of undesirable fluid flow between an interval close to a drill hole and a water aquifere underlying communication with him.a material reducing the permeability is injected into the interval near the borehole, and a portion of the material is selectivement deplacee using a gas of low density is found in theand in the meantime.the gas, in a manner possible.restore the productivity of oil or the possibility to inject a fluid into the gap so that the material reducing the chemical remaining in the meantime inhibits communication.the interval between the sheet and uidique aquifere