疏水缔合聚合物及共混聚合物水溶液性能研究

Rheological Properties of Aqueous Solutions of Copolymer and its Mixture with Anionic Surfactant

制备了一类以烷基 (C12 —C16)烯丙基卤化胺为疏水单体的阳离子型丙烯酰胺疏水缔合聚合物及与阴离子表面活性剂 (SDS)共混的共混聚合物。比较了这类疏水缔合聚合物及共混聚合物、聚丙烯酰胺 3种聚合物分别用于油田三次采油时的增粘性、抗温抗盐性能、粘附性、对石英砂的吸附情况和聚合物溶液的老化稳定性。这类水溶性疏水缔合聚合物及共混聚合物的增粘效果与超高相对分子质量聚丙烯酰胺相比有很大提高 ,但随着水的矿化度增加 ,溶液的粘度下降很快。研究认为这类疏水缔合聚合物及共混聚合物经改进后有希望作为油田三次采油的新型驱油剂。

A polyacrylamid copolymer with alkyl(C_ 12 -C_ 16 ) allyl ammonium chloride as hydrophobic comonomer is prepared. The copolymer shows hydrophobic association above 450 mL/L.The rheological properties of the aqueous solutions of the copolymer and its mixture with anionic surfactant are studied. It is found that the copolymer as well as its mixture result a much higher viscosity than polyacrylamid in water.However,the viscosity of the copolymer solution decreases quickly as the salt content increase. This copolymer and its mixture can be used for enhanced oil recovery by further improvement.