Method for controlling rock dissolution and pipe corrosion durin

Details Method for controlling rock dissolution and pipe corrosion durin Method for controlling rock dissolution and pipe corrosion durin

1987-06-22

1987-12-22

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166272, 166303, 166902, E21B 4322, E21B 4700, E21B 4706

Patent

active

047141123

ABSTRACT:
A method of inhibiting the dissolution of the gravel pack and silicate- or carbonate-containing formations subjected to steam-enhanced oil recovery processes while inhibiting the corrosion of mild steel. The method includes the controlled addition of a salt to the steam feed water to maintain the pH of the residual liquid phase in the range of from 8 to 10. Preferred salts are ammonium salts, such as ammonium sulfate and ammonium chloride.

REFERENCES:
patent: 3476183 (1969-11-01), Haynes, Jr. et al.
patent: 4068716 (1978-01-01), Allen
patent: 4475595 (1984-10-01), Watkins et al.
patent: 4476930 (1984-10-01), Watanabe
patent: 4572296 (1986-02-01), Watkins

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