Methods for hydrocarbon recovery

A method for preparing an inverted polymer solution comprising providing a liquid polymer (LP) composition in the form of an inverse emulsion comprising:

• one or more hydrophobic liquids;
• up to 38% by weight of one or more synthetic (co)polymers;
• one or more emulsifier surfactants;
• and
• one or more inverting surfactants;
• inverting the LP composition in an aqueous fluid to provide an inverted polymer solution;
• wherein the inverted polymer solution has a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter;
• and
• wherein the inverted polymer solution is used in an enhanced oil recovery (EOR) operation.

A method for hydrocarbon recovery, comprising:

• (a) providing a subsurface reservoir containing hydrocarbons there within;
• (b) providing a wellbore in fluid communication with the subsurface reservoir;
• (c) providing a liquid polymer (LP) composition comprising:
• one or more hydrophobic liquids;
• at least 39% by weight of one or more synthetic (co)polymers;
• one or more emulsifier surfactants;
• and
• one or more inverting surfactants;
• (d) inverting the LP composition in an aqueous fluid to provide an inverted polymer solution;
• wherein the inverted polymer solution has a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter;
• and
• (e) injecting the inverted polymer solution through the wellbore into the subsurface reservoir.