可渗透三相泡沫性能研究

Performance Evaluation of Permeable Three-phase Foam

赵凤兰 高 扬 程婷婷 侯吉瑞 吴雪瑞

ZHAO Fenglan，GAO Yang， CHENG Tingting，HOU Jirui， WU Xuerui

为了控制蒸汽吞吐后期的气窜以提高蒸汽利用率， 分别以聚合物和改性淀粉凝胶为悬浮剂， 并在泡沫中加入固相颗粒制得可渗透三相泡沫体系， 采用静态评价方法和物理模拟实验方法研究了可渗透三相泡沫体系的起泡能力及稳定性、 悬砂性能、 封堵性、 耐冲刷性和驱油效果。结果表明， 固结剂 （水泥+粉煤灰+自组装功能颗粒或水泥+自组装功能颗粒）加量越大， 三相泡沫体系起泡能力降低， 稳定性和悬砂性能增强。固结剂加量为 10%左右的三相泡沫的稳定性较为理想， 聚合物和改性淀粉凝胶体系均对加量高达 30%的固结剂具有良好的悬砂能力。通过调节固结剂加量， 以淀粉凝胶和聚合物为悬浮剂的三相泡沫体系对填砂管的封堵率可在 90%～95%和80%～90%范围内可调。两种三相泡沫体系可以承受 200℃蒸汽连续冲刷。淀粉凝胶三相泡沫体系对非均质岩心模型的驱油效果较好， 对 5倍级差和 10倍级差模型的采收率增幅分别达 28.8%和26.4%。图 5表 5参23

In order to control the gas channeling in the later stage of steam soaking for improving the utilization rate of steam，the three-phase foam system was prepared by adding solid particles with polymer and modified starch gel as suspension agent respectively. The foaming ability and stability，sand suspension performance，sealing property，erosion resistance and displacement effect of permeable three-phase foam system were studied by static evaluation method and physical simulation test. The experimental results showed that the greater dosage of consolidation agent（cement，fly ash，self-assembly particles or cement， self-assembly particles），the lower foaming capacity of three-phase foam system，and the stronger stability and performance of suspended sand were. The stability of three-phase foam with approximately 10% of consolidation agent was more ideal，and as much as 30% of consolidation agent content of polymer and modified starch gel system separately had good capability of suspending sand. Three-phase foam system with starch gel and polymer as suspending agent could make the seal ratio reach 90%— 95% and 80%—90% by adjusting the dosage of consolidation agent. Two three-phase foam systems could withstand continuous flushing of 200℃ steam. The three-phase foam system with starch gel had better oil displacement effect on heterogeneous core model，and the enhanced oil recovery rate of 5 times and 10 times difference model was 28.8% and 26.4%， respectively.

10.19346./j.cnki.1000-4092.2017.04.015