Acidizing reservoirs while chelating iron with sulfosalicylic ac

Wells – Processes – Placing fluid into the formation

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252 855B, 252 855C, 166308, E21B 4316

Patent

active

041379721

ABSTRACT:
The acidizing of a reservoir, particularly one that contains an asphaltenic oil, is improved by using an aqueous solution of strong acid which contains enough sulfosalicylic acid to prevent the formation of iron-asphaltenic solids.

REFERENCES:
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patent: 3625284 (1971-12-01), Gogarty et al.
patent: 3799266 (1974-03-01), Kiel
patent: 3914132 (1975-10-01), Sutton
patent: 3970148 (1976-07-01), Jones et al.
patent: 4096914 (1978-06-01), McLaughlin et al.
Chemistry of the Metal Chelate Compounds; Martell and Calvin; Aug. 1952; pp. 99 and 100 (4th paragraph p. 99 thru 2nd paragraph p. 100) and p. 543.

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