Heat-stable calcium-compatible waterflood surfactant

Details Heat-stable calcium-compatible waterflood surfactant Heat-stable calcium-compatible waterflood surfactant

1972-02-14

1976-03-09

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260615B, C07C14102

Patent

active

039431606

ABSTRACT:
A waterflood oil recovery process, in which a mixture of petroleum sulfonate and alkoxylated alcohol sulfate surfactants is injected into a reservoir to displace oil, is improved by using a sulfate surfactant that contains at least one chain-branching substituent on a carbon atom alpha or beta to the sulfate group. In a reservoir that is relatively hot, the improved process provides good oil-displacement efficiency and polyvalent metal ion compatibility in addition to improved stability towards hydrolytic decomposition of the sulfate surfactant.

REFERENCES:
patent: 2677700 (1954-05-01), Jackson et al.
patent: 2768894 (1956-10-01), Harriman
patent: 3054820 (1962-10-01), de Jong et al.
patent: 3376333 (1968-04-01), Ernst et al.
patent: 3393219 (1968-07-01), Myerly et al.
patent: 3413331 (1968-11-01), Beiser et al.
patent: 3565939 (1971-02-01), Beiser

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