用于双河油田 95℃油藏的双分散调驱体系性能评价

Evaluation Research on Profiling and Flooding Performance of Double Dispersion System Using in Shuanghe Oilfield with 95℃ High Temperature

郭 艳 黎锡瑜 孙林涛 温鸿滨 朱义清 王 熙 刘 蕊

GUO Yan LI Xiyu SUN Lintao WEN Hongbin ZHU Yiqing WANG Xi LIU Rui

为获得适合高温、中低渗透油藏条件的调驱体系，将与地层孔喉直径相匹配的聚丙烯酰胺类（TS-1）微球与耐温抗盐聚合物 KYPAM-10混配制得双分散体系，研究了 TS-1微球的悬浮性、双分散体系的热稳定性、封堵性和调剖性能。结果表明，TS-1微球在双分散体系中的悬浮性良好；聚合物和 TS-1微球的配伍性较好，在 95℃烘箱老化 180 d后的体系黏度保留率大于 80%；随老化时间延长，微球粒径略有增加。双分散体系的注入性和运移性良好，对岩心的封堵率和残余阻力系数大于单一微球体系。在双管并联岩心中注入 0.5 PV双分散体系（1500mg/L KYPAM-10+500 mg/L TS-1微球），低渗岩心分流率从 20%增至 60%，有效地改善了低渗岩心吸水能力。双分散体系驱油效果较好，可在水驱基础上提高采收率 24.15%，比单一聚合物驱提高采收率 5.78%，可用于双河油田 95℃油藏的调剖驱油。图7表 6参14

In order to obtain oil displacement system suitable for high temperature and low permeability reservoir，a double dispersion system was prepared blending polyacrylamide microsphere（TS-1）which matched formation hole roar diameter and polymer KYPAM-10. The suspension of TS-1 and thermal stability，plugging and profile performance of double dispersion system were studied. The results showed that TS-1 had good suspension behavior in double dispersion system. Polymer and TS-1 had good compatibility. The viscosity retention rate of double dispersion system was more than 80% after ageing 180 days in 95℃ oven. With increasing aging time，the particle size of microsphere increased slightly. The injection and migration of double dispersion system were good，whose sealing rate and residual resistance coefficient in the core were greater than that of single microsphere system. The separation rate of low permeability core increased from 20% to 60% after 0.5 PV double dispersion system composed of 1500 mg/L KYPAM-10 and 500 mg/L TS-1 was injected to double-pipe parallel cores，which effectively improved water absorbing capacity of low permeability core. It effectively improves the water absorption capacity of low permeability core. The oil recovery rate of double dispersion system increased by 24.15% on the basis of water flooding，and that was 5.78% higher than that of single polymer flooding，showing good oil displacement effect. The double dispersion system could be used for reservoir flooding and profile control at 95℃ in Shuanghe oilfield.