耐温抗盐交联聚合物体系成胶性能评价

Evaluation of gelling properties and formula optimization of temperature and salt resistance cross-linking polymer system

模拟双河油田95℃高温油藏条件,评价研究了交联聚合物驱油体系的成胶性能、耐温抗盐性能和长期热稳定性,分析了影响驱油体系成胶性能的主要因素。结果表明,研制的交联聚合物体系耐温抗盐性能好,耐温105℃,抗盐100 000mg/L;在95℃高温下老化180天,成胶黏度保持稳定。优化了交联聚合物体系配方,形成了高度、中度和低度交联聚合物系列配方,为高温油藏化学驱提高采收率提供了新型驱油体系。

Simulated the reservoir conditions with high temperature of 95℃ in Shuanghe oil field, properties of gelling, temperature and salt tolerance, and long-term thermal stability of cross-linking polymer systems were evaluated, and main factors impacting on gelling properties were analyzed. The experimental results showed the cross-linking polymer systems have excel- lent temperature resistance of 105℃ and salt tolerance of 100 000 mg/L salinity, as well as long term thermal stability after aging 180 days at 95℃. A line of formulations including highly cross- linked, moderate and low cross-linking systems were optimized for different oilfield applications, which provide new flooding systems for enhancing oil recovery of high temperature reservoirs.