Preventing plugging by insoluble salts in a hydrocarbon-bearing

Details Preventing plugging by insoluble salts in a hydrocarbon-bearing Preventing plugging by insoluble salts in a hydrocarbon-bearing

1987-02-03

1988-02-09

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

E21B 4322

Patent

active

047236035

ABSTRACT:
Plugging in fluid passageways of a subterranean hydrocarbon-bearing formation or associated production wells caused by the accumulation of insoluble salt precipitates therein which results from an in situ interaction between precipitate precursor ions in an injection water and resident ions already occurring in the formation is prevented by removing the precursor ions from the injection water by a reverse osmosis membrane before injecting the water into the formation.

REFERENCES:
patent: 3417823 (1968-12-01), Faris
patent: 4051901 (1977-10-01), Sarem et al.
Hudgins, Jr., et al., "How Conoco Floods with Seawater", The Oil and Gas Journal, Feb. 15, 1971, pp. 71-77.
Moore, "How to Combat Swelling Clays", The Petroleum Engineer, Mar., 1960, pp. B-78, B-90, B-94-96 & B-98-100.
Ostroff, "Compatibility of Waters for Secondary Recovery", Producers Monthly, Mar., 1963, pp. 2, 4-8.
R. E. Lacy, "Membrane Separation Process," Chemical Engineering, Sep. 4, 1972, pp. 56-73.
W. Dudley, "Low-Pressure Reverse Osmosis Pretreatment for Distiller Feedwater," Naval Ship Res. and Dev., Annapolis, MA, Nat. Tech. Information Serv., U.S. Dept. of Commerce, Sep. 1975, 5 pages, 7 figs.
G. G. Wensley et al, "Ion Selective Membranes a Presoftening Process for Seawater Distillation," Proc. of the 7th Intl. Symposium on Fresh Water from the Sea, vol. 1, pp. 427-426, 1980.
M. J. Sweeney, "Membrane-Based Liquid Separation Systems," Chem. Engineering Progress, Jan. 1985, pp. 32-35.

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