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主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
倾斜煤层煤层气与煤炭地下气化协调开发技术构想
  • Title

    Conception of coordinated development technology system for coalbed methane and underground coal gasification in inclined coal seams

  • 作者

    韦波杨曙光李鑫王双明师庆民杨兰和王刚傅雪海苏红梅贾超胡振鹏赵琛

  • Author

    WEI Bo;YANG Shuguang;LI Xin;WANG Shuangming;SHI Qingmin;YANG Lanhe;WANG Gang;FU Xuehai;SU Hongmei;JIA Chao;HU Zhenpeng;ZHAO Chen

  • 单位

    新疆维吾尔自治区煤田地质局 一五六煤田地质勘探队新疆大学 地质与矿业工程学院新疆亚新煤层气投资开发(集团)有限责任公司新疆维吾尔自治区煤田地质局 煤层气研究开发中心西安科技大学 地质与环境学院中国矿业大学 资源与地球科学学院新疆维吾尔自治区能源安全监测中心

  • Organization
    Xinjiang Uygur Autonomous Region Coalfield Geology Bureau, No.156 Coalfield Geological Exploration Team
    School of Geology and Mining Engineering, Xinjiang University
    Xinjiang Yaxin Coalbed Methane Investment and Development (Group) Co., Ltd.
    CBM Research and Development Center of Xinjiang Coal Geological Bureau, Urumqi
    College of Geology and Environment, Xi’an University of Science and Technology
    School of Resources and Geosciences, China University of Mining and Technology
    Xinjiang Uygur Autonomous Region Energy Security Monitoring Center
  • 摘要

    煤层气(CBM)开发与煤炭地下气化(UCG)是我国煤基天然气生产的重要来源,新疆前陆冲断带倾斜煤层发育区煤与煤层气资源丰富。为深入剖析倾斜煤层CBM与UCG协调开发可行性,系统剖析了现有CBM与UCG关键技术及其对CBM−UCG协调开发的借鉴意义,分析了倾斜煤层CBM与UCG协调开发优势、技术路径、面临的主要问题和未来研究方向,得到以下认识:①“CBM开发疏干效应”“UCG热作用解吸效应”“UCG采动卸压效应”下CBM−UCG协调开发可形成相互促进的良性循环;②提出了直井+顺煤层倾向井“先抽后烧”、顺煤层倾向井组合“边抽边烧”、定向L型CBM井+顺煤层倾向UCG井“边烧边抽”、下部煤层布置沿倾向UCG井+上部煤层布置定向L型CBM井“先抽后烧再抽”、复杂井型“井工厂式”布置等协调开发技术路径;③CBM与UCG协调开发面临地质选区评价理论基础研究薄弱、缝网条件下UCG热作用扩展范围不清、倾斜煤层UCG过程岩层移动卸压范围不明等理论问题;同时面临CBM−UCG协调开发“井工厂式”钻井技术、CBM井与UCG井协调开发生产制度、CBM与UCG协调开发地质动态测控、CBM井密封性与耐高温性保护等工程问题;④要强化倾斜煤层CBM与UCG协调开发地质选址评价研究、开发动态理论研究、工程协调技术先导性试验研究,确保协调开发安全、有序、可控、高效。

  • Abstract

    Coalbed methane (CBM) development and underground coal gasification (UCG) are important sources for coal-based natural gas production in China, and coal and CBM resources are abundant in the inclined coalbed development area of the Xinjiang foreland thrust belt. To deeply analyze the feasibility of coordinated development of CBM and UCG in inclined coal seams, the existing key technologies of CBM and UCG and their significances for coordinated development of CBM- UCG was systematically analyzed, the advantages, the technical routes, major problems and future research directions of coordinated development of CBM and UCG in inclined coal seams were also elaborated, the major problems faced and the direction of future research were proposed, and the following understanding was obtained. ① The coordinated development of CBM-UCG under the “CBM development dredging effect”, “UCG thermal desorption effect”, and “UCG mining pressure releasing effect” can form a virtuous cycle of mutual promotion. ② The coordinated development technology routes was proposed, such as vertical wells + inclined well along coal seam with “first drainage and then gasification”, multiple inclined wells along the coal seam with “simultaneous drainage and gasification”, directional L-typed CBM wells + UCG wells along the coal seam direction with “simultaneous gasification and drainage”, UCG wells along inclined wells in the lower coal + directional L-typed CBM wells in the upper coal seam with “first drainage, then gasification, and then drainage again”, and the “well factory” arrangement of complex well type. ③ The coordinated development of CBM and UCG faces theoretical issues such as weak theoretical foundation research on geological constituency evaluation, unclear expansion range of UCG thermal action under the condition of fracture network, and the undetermined range of rock movement and pressure relief in the UCG process of inclined coal seams. It also faces the engineering issues such as coordinated development of CBM-UCG “well factory” drilling technology, coordinated development of CBM wells and UCG wells production system, coordinated development of CBM and UCG wells geodynamic measurement and control, and the sealing and high-temperature-resistant protection of CBM wells. ④ It is necessary to strengthen the study on the evaluation of geological site selection for the coordinated development of CBM and UCG in inclined coal seams, the theoretical research on the development dynamics, and the pioneering experimental study on engineering coordination technology, so as to ensure that the coordinated development is safe, orderly, controllable and efficient.

  • 关键词

    煤层气煤炭地下气化倾斜煤层协调开发技术路径

  • KeyWords

    coalbed methane;underground coal gasification;inclined coal seam;coordinated development;technical routes

  • 基金项目(Foundation)
    新疆维吾尔自治区天山英才计划资助项目(2023TSYCLJ0005,2022TSYCLJ0021)
  • DOI
  • 引用格式
    韦 波,杨曙光,李 鑫,等. 倾斜煤层煤层气与煤炭地下气化协调开发技术构想[J]. 煤炭科学技术,2024,52(5):152−165.
  • Citation
    WEI Bo,YANG Shuguang,LI Xin,et al. Conception of coordinated development technology system for coalbed methane and underground coal gasification in inclined coal seams[J]. Coal Science and Technology,2024,52(5):152−165.
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