富油煤原位热解开发地下体系封闭方法探讨

郭威; 刘召; 孙友宏; 李强; 邓孙华

doi:10.12363/issn.1001-1986.22.12.0941

富油煤原位热解开发地下体系封闭方法探讨

doi: 10.12363/issn.1001-1986.22.12.0941

郭威^{1, 2, 3, 4,},
刘召^{1, 2, 3, 4,*, ,},
孙友宏^{2, 3, 4, 5},
李强^{1, 2, 3, 4},
邓孙华^{1, 2, 3, 4}

1.
吉林大学建设工程学院，吉林长春 130026
2.
油页岩地下原位转化与钻采技术国家地方联合工程实验室，吉林长春 130026
3.
页岩油气资源勘探开发省部共建协同创新中心，吉林长春 130026
4.
自然资源部复杂条件钻采技术重点实验室，吉林长春 130026
5.
中国地质大学(北京) 工程技术学院，北京 100083

基金项目: 国家重点研发计划课题(2019YFA0705502)；吉林省中青年科技创新卓越团队项目(20220508135RC)；吉林省发展和改革委员会自主创新能力建设项目(2022C021)

详细信息

第一作者:
郭威，1979年生，男，吉林公主岭人，博士，教授，从事非常规油气钻采技术研究. E-mail：guowei6981@jlu.edu.cn

通信作者:
刘召，1994年生，男，河南永城人，博士，助理研究员，从事油页岩原位开采地下体系封闭技术研究. E-mail：zhaoliu@jlu.edu.cn

中图分类号: P634
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- 被引次数: 0
出版历程
- 收稿日期: 2022-12-10
- 修回日期: 2023-01-07
- 录用日期: 2023-01-25
- 刊出日期: 2023-01-25
- 网络出版日期: 2023-01-18

Discussion on underground system sealing methods in in-situ pyrolysis exploitation of tar-rich coal

GUO Wei^{1, 2, 3, 4
,},
LIU Zhao^{1, 2, 3, 4,*
, ,},
SUN Youhong^{2, 3, 4, 5},
LI Qiang^{1, 2, 3, 4},
DENG Sunhua^{1, 2, 3, 4}

1.
College of Construction Engineering, Jilin University, Changchun 130026, China
2.
National-LocalJoint Engineering Laboratory of In-situ Conversion, Drilling and Exploitation Technology for Oil Shale, Changchun 130026, China
3.
Cooperative Innovation Center of Exploration and Development of Shale Oil and Gas Resources, Ministry of Education & Jilin Province, Changchun 130026, China
4.
Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, Changchun 130026, China
5.
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China

摘要

摘要: 我国富油煤资源丰富，采用地下原位热解“取油留碳”是富油煤资源绿色高效开发的主要趋势。富油煤地下原位热解开采尚处于技术研发阶段，需要围绕富油煤原位开发的关键技术开展攻关。地下体系封闭是保障富油煤原位热解开采能量高效利用和生态环保的关键技术之一，亟需研发并构建适于富油煤原位热解开发特点的地下体系封闭技术。根据目前地下体系封闭技术研究与应用现状，系统梳理总结了地下冻结、注浆帷幕、气驱止水、泡沫止水等各类地下体系封闭技术原理与优缺点，深入分析了各类技术的地层适应性。结合富油煤层埋深、层厚、区域构造等地质特点，以及热解开发工艺和规模，讨论了不同体系封闭技术在富油煤热解开发中的适用性。探讨了体系封闭技术研发的发展趋势，即创新现有技术原理、发展复合封闭技术。针对地下体系封闭技术的工程实施，围绕开发前精细设计、开发中严密监测和开发后安全恢复，提出了包括地下体系封闭设计−监测−修复和环境恢复的系统方法。通过整合富油煤原位热解、地下体系封闭、产物驱采、CO₂地质封存等关键技术，提出了富油煤地下原位热解开发及CO₂地质封存一体化技术构想，为我国富油煤地下原位热解开采技术研发与工业化应用提供参考。
- 原位热解 /
- 体系封闭 /
- 地层适应性 /
- CO₂地质封存 /
- 一体化开发技术 /
- 富油煤
Abstract: China has abundant tar-rich coal resource, in-situ underground pyrolysis is the main trend of green and efficient development of tar-rich coal resources. However, the underground in-situ pyrolysis of tar-rich coal is still in the stage of technology research and development, and it is necessary to focus on the key technology of tar-rich coal to carry out research . Underground system sealing is one of the key technologies to ensure the efficient use of energy and ecological protection of tar-rich coal in-situ pyrolysis mining, and there is an urgent need to develop and construct underground system closure technology suitable for the characteristics of tar-rich coal in-situ pyrolysis development. Based on the current status of research and application of underground system sealing technology, the principles, advantages and disadvantages of various types of underground system sealing technologies such as underground artificial freezing, grouting curtain, water-stopping by gas flooding and foam water-stopping, etc. were systematically sorted out and summarized, and the stratigraphic adaptability of various technologies weas analyzed in depth. The applicability of different system sealing technologies in the development of tar-rich coal pyrolysis is analyzed in the context of geological characteristics such as burial depth, layer thickness and regional tectonics of tar-rich coal seam, as well as the pyrolysis development process and scale. Further, the development trend of system sealing technology is discussed, i.e., innovating of existing technical principles and development of composite sealing technology. For the engineering implementation of underground system sealing technology, a systematic approach including design-monitoring-repair and environment restoration of underground system sealing is proposed around the fine design before development, strict monitoring during development and safe restoration after development. Finally, an integrated technology concept of underground in-situ pyrolysis exploitation of tar-rich coal and CO₂ geological storage was proposed by integrating the key technologies such as in-situ pyrolysis, underground system sealing, product displacement and CO₂ geological storage, which provided references for the development and industrial application of in-situ pyrolysis exploitation technology of tar-rich coal in China.
- in-situ pyrolysis /
- system sealing /
- ground adaptability /
- CO₂ geological storage /
- integrated exploitation technology /
- tar-rich coal

HTML全文

图 1 地下冻结技术原理与壳牌公司冻结墙试验井位布置方案^[10]

Fig. 1 Principle of AGF technology and well layout of Shell’s freezing wall tests^[10]

下载: 全尺寸图片幻灯片

图 2 注浆帷幕技术原理

Fig. 2 Technical principle of grouting curtain

下载: 全尺寸图片幻灯片

图 3 气驱止水封闭技术原理^[9]

Fig. 3 Schematic of water-stopping and sealing technology by gas flooding^[9]

下载: 全尺寸图片幻灯片

图 4 地下体系封闭设计−监测−修复和环境恢复系统方法

Fig. 4 System methods of design-monitoring-restoration of underground system sealing and environmental restoration

下载: 全尺寸图片幻灯片

图 5 富油煤地下原位热解开发及二氧化碳地质封存一体化技术体系构想

Fig. 5 Conception of integrated technology of underground in-situ pyrolysis exploitation of tar-rich coal and CO₂ geological storage

下载: 全尺寸图片幻灯片

表 1 4种地下体系封闭技术特点

Table 1 Characteristics of 4 underground system sealing methods

技术种类	适应地层	封闭范围	工程应用情况	对地层和工艺的影响
地下冻结技术	各类地层	封闭半径小于1 m	浅层	地层影响可逆
注浆帷幕技术	高渗、浅埋深地层	封闭半径小于1 m	浅层	地层影响不可逆
气驱止水封闭技术	无断层或溶洞等易发生气体窜流的地层	封闭半径可达数十米	浅层、中深层油页岩原位开采	对地层无影响，具有驱油效果
泡沫止水技术	各类地层，尤其适用于渗透率极差较大的地层	封闭半径中等，取决于注入泡沫压力	石油工程	对地层无影响，具有驱油效果

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