Process for extracting extensively emulsion-free oil from a subt

Details Process for extracting extensively emulsion-free oil from a subt Process for extracting extensively emulsion-free oil from a subt

1984-07-25

1985-09-24

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

166273, 252 855D, E21B 4322

Patent

active

045427909

ABSTRACT:
A process for extracting extensively emulsion-free oil from a subterranean deposit, the formation water of which has a medium or high total salinity and has a relatively low alkaline earth metal ion concentration, comprising injecting into an injection well therein a 1-20% strength aqueous tenside solution or dispersion in formation water of a mixture of 10-90% of carboxymethylated ethoxylates of the formula

REFERENCES:
patent: 2233381 (1941-02-01), De Groote et al.
patent: 3811505 (1974-05-01), Flournoy et al.
patent: 4110228 (1978-08-01), Tyler et al.
patent: 4265308 (1981-05-01), Hodges et al.
patent: 4293428 (1981-10-01), Gale et al.
Lepper, "Erdoel Ergas Zeitschrift", 92:426, (1976).
Balzer et al., Tenside Detergents 16:256, (1979).

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