To treat selectively by tubing reel an underground formation without affecting, or be assigned by the two adjacent zones

摘要

The invention relates to a novel method for selectively treating an underground formation without affecting or being affected by the two upper and lower adjacent zones. According to the method of the invention, the treatment fluid is injected into the formation to be treated F and, at the same time, two protective fluids, which may be identical or different, are injected into the upper ZS and lower ZI adjacent zones. IMAGE