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AssigneeBaker Hughes, A Ge Company, LLC
InventorsAhmed S. Zakaria, Sumit Bhaduri, Frances H. DeBenedictis, Paul S. Carman
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The disclosure relates to an aqueous acidizing fluid. In addition to an acid, the fluid contains an organophosphorus surfactant and/or an acid retarder. The organophosphorus surfactant may be an amino phosphonate or a phosphino carboxylate. The acid retarder comprises the combination of urea or a urea derivative and a bifunctional organic compound. Suitable bifunctional organic compounds contain at least one quaternary ammonium or phosphonium and at least one alcohol as well as salts of nitrogen containing heterocyclic rings.
An acidizing composition for use in acidizing a subterranean formation comprising, as a first member, an inorganic or organic acid and, as a second member:
Dependencies are inferred from the claim text.