HYDROCARBON RECOVERY DISPERSIONS

摘要

Compositions and dispersions comprising hydrophobically modified polyacrylamide (HMPAM) or associative polymers and small particles useful in hydrocarbon recovery and enhanced oil recovery processes using the same. Non-limiting embodiments include those using metal oxide small particles, including fumed silica having primary particles in the nanoparticle size range.

主权项

1. A dispersion for recovering hydrocarbons from a subterranean formation, comprising:
at least one associative polymer formed from a reaction comprising: at least one acrylamide-derived non-ionic monomer; at least one anionic monomer containing acrylic, vinyl, maleic, fumaric or allyl functionalities and containing a group selected from carboxy, phosphonate or sulfonates and/or their ammonium salts or alkaline-earth metal salts or alkali metal salts; and at least one hydrophobic monomer; and at least one silica.