Abstract: Hydrophobic associating water-soluble polymer (HAWP) is a kind of polymer, whose hydrophilic macromolecular chains have a few hydrophobic groups. The performances of solutions of HA W P and partally hydrolyzed polyacrylamide (PHPA) flowing through porous media are studied under the conditions of a reservoir simulation. The results indicate that HAWP hydrophobic group tends to bringing about intermolecu-lar association and dy namic and physical cross-linked network, its solution shows a great capability of mobility control, decreasing porous media permeability and anti-scour in distant porous media compared with PHPA. The different flow ing performances of these two solutions in porous media are more related to the molecular structures of polymers.

Key words: hydrophobic associating water-soluble polymer, porous media, percolation, rheological characteristics