Process for upgrading heavy crude oil production

C - Chemistry – Metallurgy – 10 – G

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C10G 33/04 (2006.01) C10G 21/00 (2006.01) C10G 53/04 (2006.01)

Patent

CA 2306133

A process for upgrading heavy crude oil production is described which involves adding a diluent, or solvent, which is a light hydrocarbon to reduce the viscosity and specific gravity of the crude oil being processed. After dilution, the emulsions in the crude are broken and the separation of the crude into the components follows, aided by a second injection of diluent. This upgrades the crude and enhances the amount recovered for processing at a refinery. A high asphalt content of a heavy crude can also be tolerated in the practice of this invention resulting in environmentally-benign solids and water exiting a process which due to the modularization of equipment can be practiced at the well-head itself.

L'invention concerne un procédé permettant d'améliorer la production de pétrole brut lourd. Ce procédé consiste à ajouter un diluant, ou un solvant, qui est un hydrocarbone léger pour réduire la viscosité et la densité du pétrole brut traité. Après dilution, les émulsions dans le pétrole brut sont rompues et la séparation du pétrole brut en divers composants peut être effectuée à l'aide d'une deuxième injection de diluant. Cela améliore le pétrole brut et augmente la quantité pouvant être traitée à la rafinerie. Selon la présente invention, une forte teneur en asphalt peut également être tolérée dans le pétrole brut, ce qui se traduit par la présence de solides sans danger pour l'environnement et d'eau à la fin du procédé. Ce procédé peut être mis en oeuvre au niveau de la tête de puits elle-même, par simple modularisation de l'équipement.

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