C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/26 (2006.01) C02F 1/56 (2006.01)
Patent
CA 2459977
Methods and composition for removing organics solubilized in a water-like fluid (WSO), such as the water produced in connection with the production of hydrocarbons from subterranean formations, are described. Hydrophilic .alpha.- hydroxymonocarboxylic acids (AHAs), such as hydroxyacetic (glycolic) acid, alone or optionally together with anionic polymers, have been found to be effective. The compositions and methods of this invention have reduced corrosion and scale formation problems as compared with other methods employing stronger acids to remove WSO. The AHAs have pKa's of greater than 3.8.
L'invention concerne une composition et des procédés d'extraction de matières organiques solubilisées dans un liquide aqueux (WSO), notamment l'eau des nappes souterraines dans le cadre de la production d'hydrocarbures. Les acides .alpha.-hydroxymonocarboxyliques (AHA) hydrophiles, tels que l'acide hydroxyacétique (glycolique), seuls ou éventuellement associés à des polymères anioniques, se sont avérés très efficaces. Par ailleurs, les compositions et les procédés de l'invention posent peu de problèmes de corrosion et d'entartrage par rapport aux procédés qui font intervenir des acides plus forts pour éliminer le liquide aqueux (WSO). Les AHA présentent un pK¿a? supérieur à 3,8.
Baker Hughes Incorporated
Sim & Mcburney
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