大水泥岩样的电脉冲压裂实验研究

付荣耀; 孙鹞鸿; 刘坤; 高迎慧; 徐旭哲; 严萍

doi:10.11884/HPLPB201830.170347

大水泥岩样的电脉冲压裂实验研究

doi: 10.11884/HPLPB201830.170347

付荣耀^{1, 2, 3,},
孙鹞鸿^{1, 2, 3, ,},
刘坤^{1, 2, 3},
高迎慧^{2, 3},
徐旭哲^{2, 3},
严萍^{1, 2, 3}

1.
中国科学院大学, 北京 100049
2.
中国科学院电工研究所, 北京 100190
3.
中国科学院电工研究所, 电力电子与电气驱动重点实验室, 北京 100190

基金项目:

国家自然科学基金项目 51577176

详细信息

作者简介:
付荣耀(1986—), 男，博士，从事脉冲功率技术及其应用研究; furongyao@mail.iee.ac.cn

通讯作者:
孙鹞鸿(1968—), 男，研究员，从事脉冲功率技术及其应用研究; yhsun@mail.iee.ac.cn

中图分类号: TM89
计量
- 文章访问数: 930
- HTML全文浏览量: 220
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- 被引次数: 0
出版历程
- 收稿日期: 2017-09-01
- 修回日期: 2017-11-27
- 刊出日期: 2018-04-15

Experimental study of fracturing under electric pulse for large cement sample

Fu Rongyao^{1, 2, 3
,},
Sun Yaohong^{1, 2, 3
, ,},
Liu Kun^{1, 2, 3},
Gao Yinghui^{2, 3},
Xu Xuzhe^{2, 3},
Yan Ping^{1, 2, 3}

1.
University of Chinese Academy of Sciences, Beijing 100049, China
2.
Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
3.
Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China

摘要

摘要: 在20 kV/40 kJ的重复频率压裂系统实验平台上，对大水泥岩样进行了电脉冲水中放电压裂实验。为了模拟井下实际工况，实验时将放电电极装入带有射孔的绝缘套管。水中脉冲放电时岩样中产生定向冲击压力波，冲击波作用于岩层使其产生裂缝。实验结果表明，冲击波通过绝缘套管作用于岩样时有一定的能量损失，部分冲击波压力会施加于绝缘套管，绝缘套管在整个实验期间没有发生形变，电脉冲放电对套管损伤作用极小，重复压裂冲击波会通过射孔在岩样上形成一定规模的微裂缝。去掉绝缘套管后，裸电极作用于岩样造缝效果会更好，裂缝明显的呈现对称规则。
- 重复频率 /
- 脉冲放电 /
- 压裂 /
- 绝缘套管 /
- 冲击波
Abstract: The electric pulse discharge experimental platform of 20 kV/40 kJ was set up and the impact fracture test of large cement sample was carried out. In order to simulate the actual working conditions, the discharge electrode was put into an insulated sleeve with perforation. While discharging in water, the directional impact pressure wave was produced in the rock sample, and the shock wave acted on the rock layer to produce cracks. The experimental results show that when the shock wave produced by the repeated electric pulse discharge acted on the big cement sample, it caused cracks on a certain scale, and the cracks on the rock sample surface are symmetrical. There was a certain energy loss when the shock wave moved through the insulating sleeve and part of the shock wave pressure was applied to the insulating sleeve, but the insulating sleeve did not deform during the discharging. The damage of electric pulse discharge on insulating sleeve is minimal.
- repetition rate /
- pulsed discharge /
- fracture /
- insulating sleeve /
- shockwave

HTML全文

图 1 脉冲源电路结构图

Figure 1. Schematic of the pulsed power system

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图 2 重复频率充放电系统控制界面

Figure 2. Control interface of repetitive frequency fracturing system

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图 3 三电极气体放电开关结构示意图

Figure 3. Schematic diagram of three-electrode gas switch

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图 4 放电电极意图

Figure 4. Discharge electrode

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图 5 大水泥岩样结构示意图与实物

Figure 5. Structural and physical drawing

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图 6 加入绝缘套管的放电电极

Figure 6. Discharge electrode with insulating sleeve

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图 7 压力分布图

Figure 7. Pressure distribution diagram

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图 8 套管电极压裂产生的微裂缝

Figure 8. Micro cracks

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图 9 多次重复压裂后裂缝

Figure 9. Fractures after repeated fracturing

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参考文献(11)

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