Method of improving permeability of fines-containing...

Details Method of improving permeability of fines-containing... Method of improving permeability of fines-containing...

E - Fixed Constructions

21

B

E21B 43/22 (2006.01) E21B 43/24 (2006.01)

Patent

CA 2048969

ABSTRACT OF THE DISCLOSURE METHOD OF IMPROVING PERMEABILITY OF FINES-CONTAINING HYDROCARBON FORMATIONS BY STEAM INJECTION A method is disclosed for improving the effectiveness of fluid transport in a fines-containing earthen formation and inhibiting permeability damage of that formation. Wet steam is generated from a feedwater that contains potassium chloride, enough anhydrous ammonia is added into the steam to produce sufficient ammonium ions in the vapor phase condensate to inhibit permeability damage of the formation in the vicinity of the vapor phase, enough carbon dioxide is added into the steam effective to keep the pH of the vapor phase condensate between 7.5 and 10.5, the wet steam is injected into the formation, and then the steam is blown down to vaporize liquid water of the formation and cause the vaporized water to leave the portion.

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