Method for controlling the pH of steam fluids using heterocyclic

Details Method for controlling the pH of steam fluids using heterocyclic Method for controlling the pH of steam fluids using heterocyclic

1989-01-13

1990-04-10

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166303, 166902, 1663051, 122459, E21B 4324, E21B 4700, E21B 4322

Patent

active

049151690

ABSTRACT:
The present invention relates to an improved method for controlling pH in the liquid and vapor phases of wet steam having such phases formed in a steam generation system from feedwater having therein at least one carbonate species which in the presence of steam forms a vapor phase component tending to lower the pH of the vapor phase of the steam upon condensation and a liquid phase component tending to raise the pH of the liquid phase of the steam. It comprises: (a) converting the feedwater in a steam generation system to steam having a vapor phase and a liquid phase; and (b) adding to the steam generation system, a heterocyclic, multifunctional, nitrogen-containing compound capable of forming a nonvolatile anionic component and a cationic component that, in the presence of said system, yields hydrogen ions for reducing the pH of the liquid phase of said steam and an alkaline component for increasing the pH of the vapor phase of said steam upon condensation.

REFERENCES:
patent: 4227575 (1980-10-01), Nooner
patent: 4475595 (1984-10-01), Watkins et al.
patent: 4549609 (1985-10-01), Watkins et al.
patent: 4572296 (1986-02-01), Watkins
patent: 4714112 (1987-12-01), Nigrini et al.
patent: 4802533 (1989-02-01), Hsueh et al.
Reed, M. G., "Gravel Pack and Formation Sandstone Dissolution During Steam Injection", Journal of Petroleum Technology, vol. 32, Jun. 1980, pp. 941-949.

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