Method for inhibiting silica dissolution using phase separation

Wells – Processes – Heating – cooling or insulating

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166272, 166302, 166902, E21B 4324

Patent

active

049132369

ABSTRACT:
In its broadest aspect, the present invention provides a method for inhibiting silica dissolution in the vicinity of a well penetrating a hydrocarbon-containing formation. It includes: (a) adding an amount of a chmeical compound to a wet steam which forms an alkaline component in the vapor phase of the wet steam effective to inhibit corrosion in the vicinity of the vapor phase condensate; (b) separating the wet steam into the liquid phase and the vapor phase; (c) removing an amount of the liquid phase from the wet steam effective to reduce silica dissolution in the vicinity of the liquid phase; and (d) injecting the wet steam into the formation.

REFERENCES:
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patent: 3353593 (1967-11-01), Boberg
patent: 3384177 (1968-05-01), Day et al.
patent: 3421583 (1969-01-01), Koons
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patent: 4474011 (1984-10-01), Nelson et al.
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patent: 4662391 (1987-05-01), Tolley
patent: 4714112 (1987-12-01), Nigrini et al.
Fitzgerald, Ben M., "Surface Insection and Producing Systems for Steam Operations", Producers Monthly, Dec. 1967, pp. 18-23.

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