东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (3): 422-428.DOI: 10.12068/j.issn.1005-3026.2021.03.018

• 资源与土木工程 • 上一篇    下一篇

高温高压下岩石水力压裂实验新型封隔技术

张洪伟1， 张通2， 万志军3， 周长冰4   

  1. (1. 中国矿业大学(北京) 能源与矿业学院， 北京100083; 2. 安徽理工大学 煤矿安全高效开采省部共建教育部重点实验室， 安徽 淮南232001; 3. 中国矿业大学 深部煤炭资源开采教育部重点实验室， 江苏 徐州221116; 4. 绍兴文理学院 土木工程学院， 浙江 绍兴312000)
  • 收稿日期:2020-02-26 修回日期:2020-02-26 接受日期:2020-02-26 发布日期:2021-03-12
  • 通讯作者: 张洪伟
  • 作者简介:张洪伟(1990-)，男，山东邹城人，中国矿业大学(北京)讲师，博士； 万志军(1970-)，男，四川青神人，中国矿业大学教授，博士生导师.
  • 基金资助:
    煤矿安全高效开采省部共建教育部重点实验室开放基金资助项目(JYBSYS2020103)； 中央高校基本科研业务费专项资金资助项目(2020XJNY03)； 国家自然科学基金资助项目(51674242).

New Sealing Techniques for Hydraulic Fracturing Experiment of Rock Under High Temperature and High Pressure Conditions

ZHANG Hong-wei1， ZHANG Tong2， WAN Zhi-jun3， ZHOU Chang-bing4   

  1. 1. School of Energy and Mining Engineering， China University of Mining and Technology
  • Received:2020-02-26 Revised:2020-02-26 Accepted:2020-02-26 Published:2021-03-12
  • Contact: ZHANG Tong
  • About author:-
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摘要： 为解决高温高压下水力压裂实验的封孔难题，采用理论分析、数值模拟和物理实验的方法，设计了基于楔形金属对扣结构的水力压裂实验新型密封件，模拟分析了注水作用下的封隔效果，最后采用该密封技术成功开展了大尺寸岩样在高温高压下的水力压裂实验.结果表明:高温、高压和高注水压力均是该密封构件强化密封的有利条件;增加注水压力可实现密封件越压越紧;采用该密封技术成功实现了大尺寸花岗岩试样高温三轴应力下的水力压裂，验证了新型封隔技术的密封效果，同时掌握了高温高压下岩石水力压裂的多次开裂特征.

关键词: 地热开采;高温高压;花岗岩;水力压裂;密封;封隔技术

Abstract: In order to solve the sealing problem in hydraulic fracturing experiments of rock sample under high temperature and high pressure (HTHP)， theoretical analysis， numerical simulation and physical experiment were used to design a new type of sealing hydraulic fracturing experiment based on wedge-shaped metal buckled structure and its sealing effect under water injecting was analyzed by simulation. Furthermore， the HTHP hydraulic fracturing experiments were successfully conducted by using this proposed sealing technique. The results show that the high temperature， high pressure and high water-injecting pressure are all favorable conditions for the further sealing of the wedge-shaped buckled structure. Increasing the water-injecting pressure can realize the compressed sealing process. Finally， the hydraulic fracturing experiment of large-size rocks under HTHP is successfully conducted， which in turn verfies the sealing effect of this structure. The multiple hydraulic fracturing characteristics of rock is revealed by using this sealing technique.

Key words: geothermal energy development; high temperature and high pressure; granite; hydraulic fracturing; sealing; sealing technique

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