Method for inhibiting silica dissolution during oil well...

Details Method for inhibiting silica dissolution during oil well... Method for inhibiting silica dissolution during oil well...

E - Fixed Constructions

21

B

31/14

E21B 43/24 (2006.01)

Patent

CA 1332501

The present invention provides a method for inhibiting silica dissolution in the vicinity of a well penetrating a hydrocarbon-containing formation. It com- prises: (1) injecting a wet steam including (a) an amount of an acid which forms an acidic component in the residual liquid phase of the wet steam effective to reduce the pH of the liquid phase to a range of about 8.0 to about 10.0 and (b) an amount of ammonia in the vapor phase of the wet steam effective to inhibit corrosion in the vicinity of the vapor phase condensate; (2) monitoring the pH of the residual liquid phase of the wet steam and continually adjusting the addition of the acid to maintain the pH of the liquid phase within the range of from about 8.0 to about 10Ø

570798

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