Wells – Processes – Placing fluid into the formation
Patent
1985-07-01
1987-03-10
Novosad, Stephen J.
Wells
Processes
Placing fluid into the formation
166259, 1663051, E21B 4327
Patent
active
046484566
ABSTRACT:
A method for improving the permeability in a subterranean formation by acid treatment is disclosed. In this method, an aqueous acidizing solution containing hydrofluoric acid and excess fluoride is injected into the formation. The acidizing solution dissolves siliceous materials and reduces precipitation of dissolved species from the spent acidizing solution. Further, the acidizing solution has lower acidity than presently employed acidizing solutions and thus a reduced tendency to corrode wellbore tubing and equipment.
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Kunze Kenneth R.
Lamb Walter J.
Exxon Production Research Co.
Novosad Stephen J.
Odar Thomas J.
Vickrey D. H.
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