油气藏评价与开发 ›› 2023, Vol. 13 ›› Issue (2): 260-268.doi: 10.13809/j.cnki.cn32-1825/te.2023.02.016
• 工程工艺 • 上一篇
收稿日期:
2021-11-23
发布日期:
2023-04-26
出版日期:
2023-04-26
通讯作者:
朱静怡(1991—),女,博士,助理研究员,从事非常规油气资源的增产改造技术工作。地址:四川省成都市新都区新都大道8号西南石油大学,邮政编码:610500。E-mail: 作者简介:
杨兆中(1969—),男,博士,教授,从事油气藏增产改造理论、技术和非常规天然气开发工作。地址:四川省成都市新都区新都大道8号西南石油大学,邮政编码:610500。E-mail:基金资助:
YANG Zhaozhong1(),ZHENG Nanxin1,ZHU Jingyi1,2(
),LI Xiaogang1
Received:
2021-11-23
Online:
2023-04-26
Published:
2023-04-26
摘要:
SiO2纳米颗粒(SNP)与表面活性剂的协同作用可为构建适用于恶劣地层条件下的泡沫压裂液提供一种新思路。实验评估了SiO2纳米颗粒与5种表面活性剂协同稳泡能力,基于泡沫综合值筛选了最优泡沫体系。通过对优选出的泡沫压裂液体系进行携砂性、黏弹性、剪切性、稳定性评价,分析纳米颗粒对压裂液性能的改良。同时利用光学显微镜、环境扫描电子显微镜观察揭示SiO2纳米颗粒稳泡机理。体系筛选实验表明:阳离子型表面活性剂TTAB与SiO2纳米颗粒的协同作用最明显,泡沫综合值达15 288 mm·s,析液半衰期提升了145 %。性能评价实验表明:SiO2纳米颗粒能提升界面液膜的弹性模量,提高液膜对支撑剂的支撑能力,减小沉降速率,有利于泡沫将支撑剂带入更深的裂缝当中;SiO2纳米颗粒还能提高液膜表面的粗糙度,强化泡沫压裂液的抗剪切能力;在体系中加入支撑剂会削弱泡沫的稳定性,陶粒的削弱作用强于石英砂,小粒径的削弱作用强于大粒径的削弱作用。机理研究实验表明:泡沫微观结构中观察到SNP在Plateau边界(3个气泡的交界区)聚集堵塞排液通道,这说明纳米颗粒能够阻止泡沫的粗化和排液,宏观稳定性上表现为气泡数量更多、尺寸更小、分布更均匀。
中图分类号:
Zhaozhong YANG,Nanxin ZHENG,Jingyi ZHU, et al. Preparation of nanoparticle-stabilized foam fracturing fluid and its foam stabilization mechanism[J]. Reservoir Evaluation and Development, 2023, 13(2): 260-268.
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