Corrosion inhibiting compositions comprising unsaturated...

C - Chemistry – Metallurgy – 09 – K

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C09K 8/54 (2006.01) C09K 8/72 (2006.01)

Patent

CA 2679872

Corrosion-inhibiting additives comprising certain surfactants, and associated treatment fluids and methods of use are described. In one embodiment, the method comprises: providing a treatment fluid that comprises a base fluid, an .alpha.,.beta.-unsaturated aldehyde, a sulfur-containing compound, and at least one nitrogen-containing surfactant that is anionic, nonionic, amphoteric, or zwitterionic; and introducing the treatment fluid into a subterranean formation. In another embodiment, the method comprises: providing a corrosion-inhibiting additive that comprises an .alpha.,.beta.-unsaturated aldehyde, a sulfur-containing compound, and at least one nitrogen-containing surfactant that is anionic, nonionic, amphoteric, or zwitterionic; contacting a surface with the corrosion-inhibiting additive; and allowing the corrosion- inhibiting additive to interact with the surface, whereby corrosion of the surface is at least partially inhibited or a portion of an undesirable substance on the surface is removed.

La présente invention concerne des additifs inhibant la corrosion comprenant certains tensioactifs, et des fluides de traitement et procédés d'utilisation associés. Dans un mode de réalisation, le procédé comprend les étapes consistant à : fournir un fluide de traitement qui comprend un fluide de base, un aldéhyde .alpha.,.beta.-insaturé, un composé contenant du soufre, et au moins un tensioactif contenant de l'azote qui est anionique, non ionique, amphotère, ou zwitterionique ; et introduire le fluide de traitement à l'intérieur d'une formation souterraine. Dans un autre mode de réalisation, le procédé comprend les étapes consistant à : fournir un additif inhibant la corrosion qui comprend un aldéhyde .alpha.,.beta.-insaturé, un composé contenant du soufre, et au moins un tensioactif contenant de l'azote qui est anionique, non ionique, amphotère, ou zwitterionique ; mettre en contact une surface avec l'additif inhibant la corrosion ; et laisser l'additif inhibant la corrosion interagir avec la surface, ce par quoi la corrosion de la surface est au moins partiellement inhibée ou une partie d'une substance indésirable est éliminée de la surface.

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