| Solution properties of hydrophobically associating water-soluble polymer were studied in this paper, getting its CAC under the macroscopical condition related to viscosity and concentration, discussing its rheological properties in high temperature and high salinity and under the condition of some simulated reservoir; by means of measuring the concentration of polymer making use of colorimetry of amylum-cadmium iodide, probing into the properties of the static adsorption and the parameters of the dynamic retention in the porous media from two aspects of temperature and salinity; studying the characteristic of flowing through the porous media by means of analysising the shifts of resistant factor and residual resistant factor using connection of core in series, obtaining flowing law through the porous media on the condition of different concentration and temperature and salinity, compared with HPAM which was widely employed in oil field.The following were the main contents and conclusions in this paper:Firstly, optimized polymer AP-P3 is a kind of hydrophobically associating polymer. The critical associating concentration (CAC) was 1100mg/L or so at 46℃ and at 8471mg/L salinity. AP-P3's rheological properties indicated that it has the obvious characteristics of hydrophobically associating polymer solution. That is, the viscosity of polymer solution sharply increased with increasingly polymer solution concentration above CAC, at the same time, the characteristics of shearing thinning and shearing resistance exhibited, too. The rheological properties of polymer under some simulated reservoir condition indicated that the viscosity of the hydrophobically associating polymer solution consisted of two parts which were plastic viscosity contributed by its molecular weight and structure viscosity contributed by solution structure when the concentration is above CAC.Secondly, six adsorption curves were worked out in the experiments of the static adsorption, the adsorption laws of AP-P3 and HPAM solutions was found, which were according with Langmuir isothermal adsorption law, also the static adsorption quantity of hydrophobically associating polymer on the surface of quartz sands was more than that of HPAM; in some extent, the adsorption quantities of hydrophobically associating polymer became more with the increasing of the salinity, but smaller with the increasing of the temperature.Thirdly, four concentration section curves were worked out by means of DOUBLE -POLUMER-PLUG methods, impenetrability pore volume and the dynamic retention quantity of hydrophobically associating polymer under the different condition were determined. Under the same condition, the dynamic retention quantity of AP-P3 through the porous media was no more than that of HPAM-ASG for more mechanical capture and IPV of AP-P3 was greaterthan that of HPAM-ASG for the intermolecular associating of hydrophobic groups through the porous media.Fourthly, the well injectivity of the optimized hydrophobically associating polymer AP-P3 solution and the selected HPAM solution was shown when flowing through the porous media, that is, blocking never took place and propagating was even. The capability of mobility control of AP-P3 was greater than that of HPAM, and the capability of mobility control became greater with the increasing of the salinity, but became weaker with the temperature on the same condition in some extent from the characteristic of resistance factor.Fifthly, residual resistance factor of the porous media saturated by AP-P3 solution was greater than that of the porous media by HPAM solution, the contrary law was shown for the solution near CAC: the injective pressure not fell, but rose with the injected water heavily during the course of the continuous water flooding.In some extent, the experimental data and the conclusion from this paper will contribute on theory research and practical application of the numerical simulation and dynamic prediction of polymer flooding.
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