Improved process for particle circulation in a porous medium

Details Improved process for particle circulation in a porous medium Improved process for particle circulation in a porous medium

E - Fixed Constructions

21

B

E21B 43/25 (2006.01) C09K 8/60 (2006.01) E21B 33/138 (2006.01)

Patent

CA 2068223

The purpose of the invention is an improved process for injecting and transporting small-sized particles in a natural porous medium. The process is characterized by a first phase wherein the porous medium is conditioned with an aqueous solution containing a hydrocarbonic, polymer or surfactant compound, a second involving injection of a plug of particles suspended in an aqueous solution containing at least one hydrocarbonic, polymer or surfactant compound, and a third wherein the plug of particles is propelled by a suitable aqueous medium. The process is notably useful for establishing bacteria in a porous medium.

L'invention a pour objet un procédé amélioré d'injection et de transport de particules de petites tailles dans un milieu poreux naturel. Le procédé est caractérisé en ce que, dans une première étape, on conditionne le milieu poreux au moyen d'une solution aqueuse contenant un composé hydrocarboné, de polymères ou tensio-actifs, dans une deuxième étape, on injecte un bouchon de particules mises en suspension dans un milieu aqueux contenant au moins un compose hydrocarboné, polymère ou tensio-actif et dans une troisième étape, on pousse le bouchon de particules par un milieu aqueux convenable. Le procédé est notamment utilisable pour l'implantation de bactéries dans un milieu poreux.

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