耐温抗盐交联聚合物驱油体系性能评价

<title>operty e-valuation of oil displacement system with temperature-salt resisting crosslinked polymer.

研究了部分水解聚丙烯酰胺(聚合物)与耐温抗盐交联剂所形成的流动凝胶体系的性能,并进行了物理模拟试验。结果表明,体系对聚合物本身的性能要求宽松,水解度为4％-30％、相对分子质量大于900×104的聚合物干粉成胶性能均较好;体系对温度敏感,温度较低时。体系不发生反应,所以有足够的时间配制溶液,且耐高温(90℃),可用于地层水矿化度为50000mg／L的地层。该体系由有机试剂组成,与岩石接触后不产生离子交换、沉淀反应;吸附小,与聚合物以共价键结合,形成的凝胶性能稳定,具有较高的粘弹性,可大幅度提高采收率。

<abstract>e property of flow gel system formed by partially hy-drolyzed polyacrylamide (PHPA) and temperature -salt resisting crosslinker is studied, and then physical simulation experiment is conducted. Result indicates that this system is widely suitable for the polymer proper. The gel-forming property of the polymer dry powder is good when the hydrolysis degree is 4%-30% and the relative molecular weight is above nine millions. The system is sensitive to the temperature. When the temperature was lower, the system had no reaction, so the time was enough for preparing solution and the system could resist the higher temperature (90℃) applying to the stratum with 50000mg/L of the formation water salinity. This system made up of organic reagents, when it met the rock, there was no ionic exchange and no deposition reaction, and the adsorption was little. When the system combined with the polymer by cova-lent bond, the gel property was stable with high vis-coelasticity, so the recovery efficiency can be enhanced by a big margin.