Abstract: Hydrophobic associating polymer systems have better properties in viscosity increase, temperature, salt and shearing resistance because there is some physical association with strength and reversibility between molecules of the polymer. Under the conditions of high temperature and salt reservoir in Wen、Wei、Ma oilfield, we evaluate performance of the associating polymer and compare with HPAM and AMPS. Results show that the system of the associating polymer has better properties in temperature and salt resistance and shearing recovery. In 95℃,formulated by 305 Kuai injecting waste water and in 75℃, formulated by 95 Kuai injecting waste water, when the concentra
tion is 1500ml/l, the viscosity of the system can reach 11.6 mPa.s and 16.5mPa.s. In addition, the associating polymer has perfect action on Fe3+resistance, so we needn’t consider the influence of Fe3+produced by formulating container and injecting equipment on polymer solution viscosity. At the same concentration (>1000mg/l), comparing with thickening properties of polyacrylamide and AMPS in normal temperature, the viscosity of the associating polymer is higher than the formers two orders of magnitude.

Key words: hydrophobic associating polymer, thickening, temperature resistance, salt resistance, shearing resistance