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以叔胺化星型聚酰胺基为核、十八烷基二甲基烯丙基氯化铵(ODAC)为疏水单体,通过光引发自由基聚合法合成了一系列不同ODAC含量的星型疏水缔合聚丙烯酰胺(sHMPAM);考察了ODAC含量对SHMPAM溶液的抗温性、抗盐性、过滤性、吸附性和抗剪切性能的影响。实验结果表明,在模拟油田地层水中,随ODAC含量的增加,SHMPAM溶液的临界缔合浓度减小;ODAC含量较高的SHMPAM溶液对温度有较强的敏感性;随矿化度的增加,不同ODAC含量的SHMPAM溶液的黏度均呈现下降—增加—下降的趋势;SHMPAM溶液通过1.2μm微孔滤膜时均表现出良好的过滤性;在石英砂表面的吸附曲线基本符合Langmuir等温吸附规律;经高速剪切后,不同ODAC含量的SHMPAM溶液表观黏度的保黏率均超过25%,具有一定的抗剪切性。
A series of stars with different ODAC content were synthesized by photoinitiation free radical polymerization using tertiary aminated polyamide as core and octadecyl dimethylallyl ammonium chloride (ODAC) as hydrophobic monomer. Hydrophobically associating polyacrylamide (sHMPAM). The effects of ODAC content on the temperature resistance, salt resistance, filterability, adsorption and shear resistance of SHMPAM solution were investigated. The experimental results show that the critical concentration of SHMPAM solution decreases with the increase of ODAC content in the simulated formation water. SHMPAM solution with high ODAC content has a strong sensitivity to temperature. With the increase of salinity, The viscosities of SHMPAM solution with ODAC content all showed a decreasing-increasing-descending trend. The SHMPAM solution showed good filterability when passing through 1.2 μm microporous membrane. The adsorption curve on quartz sand surface accorded with Langmuir isotherm. After high-speed shearing, the apparent viscosity retention rates of SHMPAM solution with different ODAC contents were more than 25%, and had certain shear resistance.