E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/138 (2006.01)
Patent
CA 2135567
The present invention relates to a method of terminating undesirable gas migration in a well through one or more passages such as channels and microannuli in the cement sheath holding the casing in the well bore. The methods basically comprise forming one or more lateral openings through the casing and the cement sheath into a substantially gas impermeable formation penetrated by the well bore. One or more horizontal fractures are created in the formation extending from the lateral openings, and a fluid which sets into a substantially gas impermeable solid is deposited in the openings and fractures. The fluid is permitted to set into a substantially gas impermeable solid in the openings and fractures whereby passages in the cement sheath are plugged and gas migration is terminated.
Cole Orville Robert
Saponja Jeffrey Charles
Company Halliburton
Husky Oil Operations Ltd.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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