| CPC C09K 8/588 (2013.01) [C09K 8/584 (2013.01); E21B 43/20 (2013.01)] | 27 Claims |
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1. A method for mixing an inverted polymer solution for use in the recovery of hydrocarbons from a subsurface reservoir containing the hydrocarbons therewithin; the method comprising:
providing a liquid polymer (LP) composition comprising:
one or more synthetic (co) polymers having a molecular weight of from 15,000,000 g/mol to 30,000,000 g/mol;
one or more hydrophobic liquids;
one or more emulsifier surfactants; and
one or more inverting surfactants;
mixing the LP composition in an in-line mixer with an aqueous fluid in a single step to generate an inverted polymer solution having a concentration of synthetic (co) polymer of from 50 to 15,000 ppm;
wherein the inverted polymer solution does not exhibit signs of plugging in an injectivity test performed using surrogate rock for the subsurface reservoir,
wherein the injectivity test comprises a core flooding experiment performed using surrogate rock for the subsurface reservoir in which the inverted polymer solution is injected into a core comprising the surrogate rock for the subsurface reservoir at a flow rate of 0.5 mL/min at a temperature of 31° C.; and
wherein the inverted polymer solution exhibits a relative permeability of approximately 1 after 28 pore volumes of the inverted polymer solution are injected into the core during the core flooding experiment.
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