| 摘要 |
<p>Improved oil recoveries with water-external micellar solutions are obtained by flooding with a micellar solution containing water, a viscosity-increasing agent dissolved in the water, hydrocarbon, and monovalent cation-containing petroleum sulfonate(s) having an average equivalent weight within the range of about 300-525 and being present in concentrations at least five times the CMC (critical micelle concentration) within the particular micellar solution. Optionally cosurfactant and/or electrolyte can be present. The micellar solution can be followed by an aqueous mobility buffer and the buffer followed by a waterdrive. The micellar solution is displaced toward a production well to recover crude oil therethrough.</p> |
