Process for stably sequestering iron while acidizing a reservoir

Details Process for stably sequestering iron while acidizing a reservoir Process for stably sequestering iron while acidizing a reservoir

1978-07-13

1979-09-11

Novosad, Stephen J.

Wells

Processes

Placing fluid into the formation

166308, 252 855C, E21B 4327

Patent

active

041672143

ABSTRACT:
In a well treating process in which an acidic solution having a pH of less than about 2 tends to dissolve ferric ion-containing materials from the well conduits and to precipitate ferric ion-containing solids when the pH of the solution increases beyond about 3, such a precipitation can be prevented by dissolving limited proportions of both 5-sulfosalicylic acid and citric acid within the acidic solution to be injected.

REFERENCES:
patent: 2175095 (1939-10-01), Stoesser
patent: 2217676 (1940-10-01), Fry
patent: 2652360 (1953-09-01), Bond et al.
patent: 3021279 (1962-02-01), Scanley
patent: 3142335 (1964-07-01), Dill et al.
patent: 3254718 (1966-06-01), Dunlap
patent: 3799266 (1974-03-01), Kiel
patent: 3945438 (1976-03-01), Tate et al.
patent: 4089787 (1978-05-01), Lybarger et al.
patent: 4090563 (1978-05-01), Lybarger et al.
patent: 4096914 (1978-06-01), McLaughlin et al.

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