耐温抗盐丙烯酰胺系聚合物驱油剂最新研究进展

Newest Research Development of Acrylamide Based Polymer Flooding Agent with Temperature Resistance and Salt Tolerance

常规的丙烯酰胺聚合物在高温高盐条件下,易发生水解和热降解反应,导致溶液黏度随温度和盐浓度的增加而降低,从而限制其应用。在聚合物亲水性大分子链上引入少量(摩尔分数小于2%)疏水基团可使聚合物的溶液呈现出特殊的流变性能,从而具有良好的耐温耐盐性能。该文综述了近几年来不同单体单元组成的耐温抗盐型水溶性丙烯酰胺系列聚合物的研究进展,并对耐温抗盐交联聚合物尤其是弱凝胶驱油体系的成胶、调驱机理以及研究状况做了简要论述。

The hydrolysis reaction and thermal-oxidative degradation tend to occur in the traditional polyacrylamide polymers under conditions of high temperature and high salinity,leading to a reduction of polymer solution viscosity with temperature and salt content increasing,hence their limited applications.A small amount of hydrophobic groups introduced onto the hydrophilic macromolecular chains of polymers endows them with the special rheological properties and excellent tolerance of high temperature and high salt content.This paper summarizes in detail the research progress of the heat-and salt-resistant water-soluble polyacrylamide series in recent years based on different unit construction of monomers.Furthermore,the gelation and profile modification mechanism and research status of the salt-and heat-tolerant crosslinking polymers,especially the weak gel flooding agents,were concisely discussed.