Method for selectively plugging water zones

Details Method for selectively plugging water zones Method for selectively plugging water zones

1978-05-01

1978-12-19

Novosad, Stephen J.

Wells

Processes

Material placed in pores of formation to treat resident...

166294, 166305R, E21B 33138, E21B 4300

Patent

active

041301650

ABSTRACT:
A method for shutting off or decreasing the production of water from an oil well. An oil well producing excess water is taken off production and a gas is injected into the well, followed by a slug of clean oil containing an emulsifier. The well is then produced as fast as possible. The previously injected gas and water in water-producing zones begin to finger back through the oil slug and forms a viscous emulsion which blocks the further flow of water into the producing well.

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patent: 3472319 (1969-10-01), McAuliffe
patent: 3547199 (1970-12-01), Froning et al.

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