C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/00 (2006.01) C04B 24/26 (2006.01) C04B 26/02 (2006.01) C08J 3/00 (2006.01) C09K 3/00 (2006.01) E21B 21/00 (2006.01) E21B 33/13 (2006.01) E21D 11/04 (2006.01)
Patent
CA 2436377
The present invention provides a cement composition and a process for using the cement composition to inhibit gas migration from a subterranean zone into the cement. The process comprises displacing a gelling additive, preferably comprised within a cement composition, into a well bore such that the gelling additive passes into the subterranean zone, and allowing the gelling additive to form a crosslinked gel in the subterranean zone to inhibit gas migration from the subterranean zone. The crosslinked gel acts as a barrier to gas in the subterranean zone and thereby inhibits the gas from passing into the cement and forming flow channels therein before the cement can set.
Biezen Ewout
Dao Bach
Pham Thien
Vijn Jan Pieter
Halliburton Energy Services Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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