不同油藏条件下缔合聚合物溶液的宏观流变性研究

STUDY ON MACROSCOPICAL RHEOLOGICAL PROPERTY OF ASSOCIATION POLYMER SOLUTION ON DIFFERENT RESERVOIRS

在国内三个典型的注聚油藏条件下,主要研究了缔合聚合物溶液的宏观流变性,并与一般超高分子量的MO4000溶液的流变性进行了比较,结果表明,缔合聚合物溶液具有不同与一般HPAM溶液的特殊的流变性,临界缔合浓度CAC(Critical Association Concentration,CAC)以上、下缔合聚合物具有不同的流变性,同时实际的油藏温度和盐水矿化度不同,缔合聚合物溶液表现出了不同的流变规律,要研究缔合聚合物溶液的流变性必须在实际的油藏条件下进行;同时在CAC以上缔合聚合物溶液的粘度远于超高分子量MO4000溶液的粘度。缔合聚合物溶液具有的这些特殊的流变性对缔合聚合物驱油方案设计、驱油用缔合聚合物分子结构设计等具有一定的指导意义。

This paper has studied macroscopical rheological properties of Associating Polymer Solution (APS), and has compared with super high molecular weight MO4000 under three typical flooding polymer reservoirs in China. The results show: APS has special rheological behavior different to general HPAM solution, the rheological rules differ above CAC (Critical Association Concentration, CAC) and under CAC, and are different in different actual reservoir temperature and salinity. So, the study for rheological properties of APS is carried out in actual reservoir condition. At the same time, the viscosity of APS above CAC is more far than super high molecular weight MO4000. These special rheological behaviors of APS have certain guidance meaning to the design scheme of association polymer flooding and polymer molecule structural design etc.