Compositions – Leather or fur treating
Patent
1976-12-01
1978-08-29
Guynn, Herbert B.
Compositions
Leather or fur treating
166273, 166275, E21B 4322
Patent
active
041102290
ABSTRACT:
Disclosed is an aqueous, saline surfactant-containing fluid and an oil recovery process using the fluid for recovering oil from formations containing high salinity and/or high hardness water, the fluid comprising an anionic surfactant such as organic sulfonate especially petroleum sulfonates as well as synthetic alkyl or alkylaryl sulfonates and a solubilizing co-surfactants such as an ethoxylated alcohol, alkyl phenol, or alkyl or alkylaryl thiol, or sulfated or sulfonated, ethoxylated alcohols or alkyl phenols. Optimum performance in any particular field is achieved if the ratio of primary anionic surfactant to solubilizing co-surfactant is carefully chosen so the surfactant combination exhibits borderline solubility in the particular formation brine in which the surfactants are to be employed. The concentration ratio of primary and solubilizing surfactants which results in the desired borderline solubility may be identified by preparing a number of samples in the formation water using different weight ratios of primary surfactant to solubilizing co-surfactant concentration, and visually noting the minimum co-surfactant needed to avoid separation of the surfactant fluid into separate phases, or which gives the surfactant fluid a pearlescent, a swirl-silver appearance which is characteristic of fluids having the proper balance of primary anionic surfactant and solubilizing co-surfactant.
REFERENCES:
patent: 3468377 (1969-09-01), Dunlap et al.
patent: 3508612 (1970-04-01), Reisberg et al.
patent: 3811505 (1974-05-01), Flournoy et al.
patent: 3811507 (1974-05-01), Flournoy et al.
patent: 3858656 (1975-01-01), Flournoy et al.
patent: 3890239 (1975-06-01), Dycus et al.
patent: 3945437 (1976-03-01), Chiu et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, Second Edition, vol. 19, 1969, pp. 507-509.
Carlin Joseph T.
Mills, Jr. Melvin E.
Tyler Timothy N.
Ware James W.
Guynn Herbert B.
Park Jack H.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
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