疏水型SiO2纳米颗粒稳定泡沫机理与 泡沫耐温性能评价

Properties of Hydrophobic SiO2 Nanoparticles Stabilized Foam and It’s Temperature Resistance Evaluation

李兆敏 侯大炜 鹿 腾 黄时祯 张克明 李 晟 顾子涵

LI Zhaomin HOU Dawei LU Teng HUANG Shizhen ZHANG Keming LI Sheng GU Zihan

针对普通泡沫体系在高温油藏环境下稳定性差的问题，选用疏水纳米SiO2颗粒增强苯磺酸盐类耐温泡沫 剂HY-4的高温稳定性，评价了HY-4与纳米颗粒复配前后的泡沫性能，分析了纳米颗粒的稳泡机理，评价了泡沫 体系的耐温性能，对比了两种泡沫体系的高温封堵能力。结果表明，0.5% HY-4与1.0%疏水纳米SiO2颗粒复配 体系的泡沫性能最优；在150℃之内，复配体系老化12 h后的泡沫性能明显优于HY-4泡沫体系；复配体系泡沫平 均粒径小于HY-4泡沫体系，且静置1 h后泡沫粒径变化较小；在150℃下，复配泡沫体系对岩心的封堵能力优于 HY-4泡沫体系，岩心产出泡沫的粒径小、球形度高、抗挤压能力强。疏水纳米SiO2颗粒可大幅增强泡沫稳定性， 提高泡沫体系的高温封堵能力。图23参28

Because of the poor stability of ordinary foaming agents in high temperature reservoir environment，hydrophobic SiO2 nanoparticle was selected to enhance high temperature stability of benzene sulfonate foaming agent HY-4. Foam properties of HY-4 before and after compounding with nanoparticles were contrasted，while the foam stabilization mechanism of nanoparticles was discussed. Then，the temperature resistance of different foam systems were evaluated，as well as their high temperature plugging capabilities were compared. The results showed that the composite foam system with 0.5% HY-4 and 1.0% hydrophobic SiO2 nanoparticles had the best foam performance. The foam performance of composite system after aging 12 hrs was obviously better than that of HY-4 foam system below 150℃. The foam size of composite foam system was also smaller than that of HY-4 foam system，and it was little changed after 1 h standing. Besides，the core plugging capability of composite foam system was superior to that of HY-4 foam system at 150℃. And the foam of the composite system produced by the core had small particle size，high sphericity and strong compression resistance. Hydrophobic SiO2 nanoparticle could greatly enhance foam stability and improve foam plugging capability at high temperature

10.19346/j.cnki.1000-4092.2019.03.021