Acidizing wells

Details Acidizing wells Acidizing wells

1975-09-10

1977-02-15

Novosad, Stephen J.

Wells

Processes

Separate steps of fracturing or attacking formation

166307, E21B 33138, E21B 4327

Patent

active

040077896

ABSTRACT:
Method for the acid treatment of a subterranean formation surrounding a wellbore comprising introducing alternate slugs of acid and an aqueous gel prepared from water-soluble cellulose ethers into a borehole penetrating a formation to be acidized. The slugs of gel serve as spacer slugs to direct the acid slugs into the portions of the formation or zones of a multi-zone formation it is desired to acidize.

REFERENCES:
patent: 2122452 (1938-07-01), Clason
patent: 3160206 (1964-12-01), Jorda
patent: 3353604 (1967-11-01), Gibson et al.
patent: 3612179 (1971-10-01), Anderson et al.
patent: 3707194 (1972-12-01), Svaldi
patent: 3724549 (1973-04-01), Dill
patent: 3727687 (1973-04-01), Clampitt et al.
patent: 3727688 (1973-04-01), Clampitt
patent: 3845822 (1974-11-01), Clampitt et al.

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