Process for controlling gas migration during well cementing

Details Process for controlling gas migration during well cementing Process for controlling gas migration during well cementing

2006-06-13

2006-06-13

Marcantoni, Paul (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C106S727000, C106S823000, C524S004000, C524S005000, C524S006000

Reexamination Certificate

active

07060129

ABSTRACT:
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.

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