| 摘要 |
Crude oil is recovered from a subterranean oil-bearing formation having injection means in fluid communication with production means by injecting into the formation 1-20 percent formation pore volume of a micellar dispersion (contains hydrocarbon, surfactant, and aqueous medium) followed by 10-100 percent or more formation pore volume of foam. Drive water can be injected to displace the micellar dispersion and foam toward the production means to recover crude oil. The foam can have a mobility about equal to or less than that of the micellar dispersion. Also, a liquid mobility buffer slug can precede or follow the foam.
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