Using nanoparticles for water flow control in subterranean...

E - Fixed Constructions – 21 – B

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E21B 33/128 (2006.01) E21B 43/22 (2006.01)

Patent

CA 2724401

Non-aqueous carrier fluids containing nano-sized particles in high concentration are effective for zone isolation and flow control in water shutoff applications for subterranean formations. The nanoparticles interact with water and solidify it to inhiblt its flow, but do not have the same effect on hydrocarbons and thus selectively assist the production of hydrocarbons while suppressing water. Suitable nanoparticles include alkaline earth meta! oxides, alkaline earth metal hydroxides, alkali metal oxides, alkali metal hydroxides, transition metal oxides, transition metal hydroxides, post-transition metal oxides, post-transition metal hydroxides, piezoelectric crystals, and/or pyroelectrlc crystals.

Des fluides porteurs non aqueux contenant une forte concentration de particules de dimension nanométrique sont efficaces pour lisolement dune zone et le contrôle de lécoulement de leau dans les applications darrêt de leau pour formations souterraines. Les nanoparticules interagissent avec leau et elles la solidifient pour empêcher son écoulement, mais elles nont pas le même effet sur les hydrocarbures et favorisent ainsi sélectivement la production dhydrocarbures tout en éliminant leau. Les nanoparticules appropriées comprennent des oxydes de métaux alcalinoterreux, des hydroxydes de métaux alcalinoterreux, des oxydes de métaux alcalins, des hydroxydes de métaux alcalins, des hydroxydes de métaux de transition, des oxydes de métaux de post-transition, des hydroxydes de métaux de post-transition, des cristaux piézoélectriques, et/ou des cristaux pyroélectriques.

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