METHOD FOR EXTRACTING PETROLEUM FROM AN UNDERGROUND DEPOSIT

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 under the influence of the temperature in the formation. 10