Wells – Processes – Distinct – separate injection and producing wells
Patent
1985-08-22
1986-10-21
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166274, 166303, E21B 4324, E21B 4322
Patent
active
046179950
ABSTRACT:
Oil is produced from an ion-exchanging reservoir by a dual gradient-establishing injection of a relatively short and concentrated slug of hot aqueous fluid containing surfactant and monovalent salt, followed by a steam-foaming mixture in which stem is mixed with much less of each of the surfactant and salt.
REFERENCES:
patent: 3087539 (1963-04-01), Mauru
patent: 4074755 (1978-02-01), Hill et al.
patent: 4393937 (1983-07-01), Dilgren et al.
patent: 4532993 (1985-08-01), Dilgren et al.
Novosad Stephen J.
Odar Thomas J.
Shell Oil Company
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