Method of sealing a fracture in a wellbore and sealing system

摘要

In a method of sealing a fracture 1 in a formation 2 surrounding a wellbore provided with a non-cemented perforated liner 4, a placement tool 6 is introduced into the liner, and a first and second annular flow barrier 8, 9 create an upstream 10, an intermediate 11 and a downstream section 12. A cross flow shunt tube 13 connects the upstream section and the downstream section, and a sealing fluid outlet 14 is arranged in the intermediate section. A placement fluid is caused to flow into the fracture and controlled to obtain a desired fluid flow in an annular space between the liner and the formation that is directed in downstream direction at a position up­stream the fracture and in the upstream direction at a position downstream the fracture. When said desired flow is obtained, sealing fluid is ejected from the sealing fluid outlet.