电爆冲击波增渗解堵技术试验研究

周鹏; 杜孝友; 曹砚锋; 于继飞; 江海畏; 薛启龙

doi:10.11911/syztjs.2020033

电爆冲击波增渗解堵技术试验研究

周鹏^{1, 2,},
杜孝友^{3, 4},
曹砚锋^{3, 4},
于继飞^{3, 4},
江海畏^{1, 2},
薛启龙^{1, 2,*, ,}

1.
中国地质大学（北京）工程技术学院，北京 100083
2.
自然资源部深部钻探重点实验室，北京 100083
3.
海洋石油高效开发国家重点实验室，北京 100028
4.
中海油研究总院，北京 100028

基金项目: 海洋石油高效开发国家重点实验室开放基金课题“电爆冲击波解堵技术适应性研究”及国家科技重大专项课题“海上稠油油田高效开发钻采技术”（2016ZX05025-002）”联合资助

详细信息

作者简介:
周鹏（1990—），男，江苏苏州人，2018年获中国地质大学（北京）地质工程专业硕士学位，主要从事电爆冲击波解堵设备的研发工作。E-mail：zhoupeng@163.com

通讯作者:
薛启龙，E-mail：xql@cugb.edu.cn

中图分类号: TE358
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出版历程
- 收稿日期: 2019-12-22
- 修回日期: 2020-02-03
- 网络出版日期: 2020-03-04
- 刊出日期: 2020-02-29

Experimental Research on Permeability Enhancement and Plug Removal by Means of an Electric Explosion Shock Wave

ZHOU Peng^{1, 2,},
DU Xiaoyou^{3, 4},
CAO Yanfeng^{3, 4},
YU Jifei^{3, 4},
JIANG Haiwei^{1, 2},
XUE Qilong^{1, 2,*, ,}

1.
School of Engineering and Technology, China University of Geosciences(Beijing), Beijing, 100083, China
2.
Key Laboratory of Deep Geodrilling Technology, Ministry of Land and Resources, Beijing, 100083, China
3.
State Key Laboratory of Offshore Oil Exploitation, Beijing, 100028, China
4.
CNOOC Research Institute, Beijing, 100028, China

摘要

摘要:
常规油水井解堵技术存在工艺复杂、成本高和环境污染严重等问题，电爆冲击波增渗解堵技术因具有解堵增渗效果好、能量可控和环保等优势而成为研究热点。在分析电爆冲击波增渗解堵机理的基础上，研制了电爆冲击波试验装置，进行了电容、充电电压及金属丝直径对电爆冲击波压力峰值的影响试验，并进行了模拟地层压力环境下的电爆冲击波造缝及解堵效果评价试验。结果表明，冲击波压力峰值随着充电电压增大呈线性增大，金属丝直径对冲击波压力峰值影响不大，存在一个使冲击波压力峰值最大的最优电容，验证了电爆冲击波可以扩展储层岩石的裂缝并产生新的微裂缝，而且能达到增渗解堵的效果。研究结果为推动电爆冲击波增渗解堵技术研究及现场试验奠定了基础。
- 电爆冲击波 /
- 压力峰值 /
- 增渗 /
- 解堵 /
- 渗透率 /
- 岩心试验
Abstract:
Using an electric explosion shock wave to enhance permeability and remove plugging have become a hot topic because of the possibility for better control and also better environmental protection. Conventional plugging removal techniques for oil and water wells present problems that include complicated processes, high cost and serious environmental pollution. For that reason, permeability enhancement and plugging removal techniques from electric explosion shock wave have become a research hot spot for the advantages of good plugging removal and permeability enhancement effect, controllable energy, environmental protection, etc. By analyzing the mechanism of permeability enhancement and plugging removal from electric explosion shock wave, an experimental device for the influence factors evaluation was developed. The effects of capacitance, charging voltage and wire diameter on the peak pressure of electric explosion shock wave were tested, and the electric explosion shock wave fracture-generating and plugging removal were evaluated under the simulated in-situ conditions of the reservoir. The experimental results show that the shock wave peak pressure increases linearly with charging voltage, and wire diameter has little effect on the shock wave peak pressure. There is an optimal capacitance that maximizes the shock wave peak pressure, which verifies that the electric explosion shock wave can trigger fracture propagation in reservoir and generate new microcracks, hence enhancing permeability enhancement and facilitating plugging removal. The research results provide a baseline for promoting the research and field test permeability enhancement and plugging removal from electric explosion shock wave.
- electric explosion shock wave /
- peak pressure /
- permeability enhancement /
- plug removal /
- permeability /
- core test

HTML全文

图 1 井下电爆冲击波解堵技术基本原理及试验装置

Figure 1. Basic principle of permeability enhancement and plugging removal technology from downhole electric explosion shock wave

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图 2 电爆冲击波金属丝放电电路

Figure 2. Electric explosion shock wave metal wire discharge circuit

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图 3 冲击波压力影响因素试验装置基本原理

Figure 3. Basic principle of the shock wave pressure influencing factors test device

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图 4 冲击波压力峰值随充电电压的变化规律

Figure 4. Variation laws of shock wave peak pressure with charging voltage

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图 5 冲击波压力峰值随金属丝直径的变化规律

Figure 5. Variation laws of shock wave peak pressure with wire diameter

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图 6 冲击波压力峰值随电容的变化规律

Figure 6. Variation laws of shock wave peak pressure with capacitance

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图 7 电爆冲击波对C30混凝土试样造缝试验结果

Figure 7. Fracture-generating results of electric explosion shock wave on C30 concrete sample

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图 8 电爆冲击波解堵试验装置示意

1.压力传感器；2.放电电极；3.电爆压力罐；4.围压传感器；5.压力控制阀1；6.流量计量装置；7.储液箱；8. 注流泵；9.围压加载阀；10.压力控制阀2；11.流入流量控制阀；12.供液压力罐；13.轴压传感器1；14.轴压传感器2；15.测试岩心

Figure 8. Schematic of the electric explosion shock wave plugging removal test device

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图 9 冲击波作用前后渗透流量随时间变化曲线

Figure 9. Curves of seepage flow vs. time pre/post-shock wave action

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