Process for controlling gas influx into well bores

Details Process for controlling gas influx into well bores Process for controlling gas influx into well bores

E - Fixed Constructions

21

B

E21B 33/13 (2006.01)

Patent

CA 2120098

A process for controlling gas influx into a section of a well bore is provided. The invention comprises placing a squeeze fluid in the well bore and maintaining an applied pressure to the squeeze fluid so that the squeeze fluid is forced radially into permeable formations of the well bore wall to create a flushed zone of reduced permeability to gases. Additional embodiments of the process involve the additional steps of displacing the squeeze fluid remaining in the well bore to the surface by a drilling solution, adding a casing to the flushed zone thus creating an annulus between the casing and well bore wall and subsequently pumping a cement slurry into the annulus to seal the annulus between the casing and well bore wall. The process of the invention may be applied during primary drilling or at a remedial setting.

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