Composition and process for oil extraction

Details Composition and process for oil extraction Composition and process for oil extraction

C - Chemistry, Metallurgy

09

K

C09K 8/58 (2006.01) C09K 8/565 (2006.01) C09K 8/588 (2006.01) C09K 8/60 (2006.01) E21B 43/22 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2389760

The invention relates to a composition for use in the extraction of oil and to a method of extracting oil using the composition. The composition comprises components A, B and C in which: A is a first solid hydrophobic material which is insoluble in an organic solvent selected from light fractions of petroleum, distillate, kerosene, acetone, gasoil, hexane, benzene and condensate; B is a second hydrophobic material which is either soluble in or can be emulsified with an organic solvent selected from light fractions of petroleum, distillate, kerosene, acetone, gasoil, hexane, benzene and condensate; and C is a retention improving material comprising a mineral material. A solvent, D, is added before the composition is used to treat an oil well. In oil well systems in which water or surfactant is pumped into the stratum through an injection well under pressure so that petroleum is forced from the rock stratum into the bottom hole zone of an extraction well, the composition is added to the extraction well.

L'invention concerne une composition servant à extraire du pétrole et un procédé d'extraction de pétrole au moyen de cette composition. Cette dernière contient les constituants A, B et C: A consiste en un premier matériau solide hydrophobe insoluble dans un solvant organique sélectionné dans des fractions légères de pétrole, distillat, kérosène, acétone, mazout, hexane, benzène et condensat; B consiste en un deuxième matériau hydrophobe qui est soit soluble, soit émulsifiable dans un solvant organique sélectionné dans des fractions légères de pétrole, distillat, kérosène, acétone, mazout, hexane, benzène et condensat; C consiste en un matériau améliorant la retenue à base d'un minerai. On ajoute un solvant D avant d'utiliser la composition afin de traiter un puits de pétrole. Dans des systèmes de puits de pétrole, dans lesquels on introduit par pompage dans la couche de l'eau ou un tensioactif par l'intermédiaire d'un puits d'injection sous pression, de façon à expulser le pétrole depuis la couche rocheuse afin de le faire pénétrer dans la zone de fond de puits d'un puits d'extraction, on ajoute la composition à ce puits d'extraction.

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