| 摘要 |
PF72060 26 Method for extracting petroleum from an underground deposit Abstract 5 Method for extracting petroleum, wherein an aqueous flood medium comprising water, a glucane, urea and optionally surfactants is injected into the petroleum formation and petroleum is extracted from the formation through at least one production borehole, wherein the formation has a temperature of at least 60�C. The formulation forms foams in situ, under the influence of the temperature, in the formation. 10 |
