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我国煤层气高效开发关键技术研究进展与发展方向

徐凤银 闫霞 林振盘 李曙光 熊先钺 严德天 王虹雅 张双源 徐博瑞 马信缘 白楠 梅永贵

徐凤银,闫霞,林振盘,等. 我国煤层气高效开发关键技术研究进展与发展方向[J]. 煤田地质与勘探,2022,50(3):1−14 doi: 10.12363/issn.1001-1986.21.12.0736
引用本文: 徐凤银,闫霞,林振盘,等. 我国煤层气高效开发关键技术研究进展与发展方向[J]. 煤田地质与勘探,2022,50(3):1−14 doi: 10.12363/issn.1001-1986.21.12.0736
XU Fengyin,YAN Xia,LIN Zhenpan,et al. Research progress and development direction of key technologies for efficient coalbed methane development in China[J]. Coal Geology & Exploration,2022,50(3):1−14 doi: 10.12363/issn.1001-1986.21.12.0736
Citation: XU Fengyin,YAN Xia,LIN Zhenpan,et al. Research progress and development direction of key technologies for efficient coalbed methane development in China[J]. Coal Geology & Exploration,2022,50(3):1−14 doi: 10.12363/issn.1001-1986.21.12.0736

我国煤层气高效开发关键技术研究进展与发展方向

doi: 10.12363/issn.1001-1986.21.12.0736
基金项目: 国家科技重大专项项目(2016ZX05042);中国石油天然气股份有限公司前瞻性基础性技术攻关科技项目(2021DJ2301);中石油基础性研究项目(2019E-2501)
详细信息
    第一作者:

    徐凤银,1964年生,男,陕西佳县人,博士,教授,博士生导师,从事煤炭、煤层气、石油、天然气地质研究与管理工作. E-mail:xufy518@sina.com.cn

    通信作者:

    闫霞,1984年生,女,山东东营人,博士,高级工程师,从事煤层气及非常规油气开发研究工作. E-mail:yanxia_cbm@petrochina.com.cn

  • 中图分类号: TE132;P168.13

Research progress and development direction of key technologies for efficient coalbed methane development in China

  • 摘要: “十三五”期间,围绕“突破煤层气单井产量低”这一制约我国煤层气高效开发的重大难题,借助国家科技重大专项和其他技术攻关研究,煤层气勘探开发理论认识和工程技术都取得明显进展,表现在4个方面:(1) 勘探理念从寻找富集甜点区向高产甜点区转变,开发部署由平铺式到精细化调整转变。(2) 围绕高效增产技术方面,在实现由二维地震向三维地震、由直井(丛式井)向水平井实践拓展的同时,创新形成以储层改造为主的系列压裂技术,包括碎软煤间接压裂、方解石填充深部(层)煤层气水平井少段多簇体积酸化压裂、特低渗深部(层)煤层气水平井超大规模极限压裂等技术,初步解决了构造煤煤层气效益开发难题,突破了2 000 m以深部(层)压裂改造技术瓶颈,推动了煤层气开发从中浅层向深部(层)的延伸;(3) 围绕排采技术方面,创新形成定量化排采多目标优化设计、煤层气井无杆举升、负压排采等关键技术,推动煤层气排采控制由定性向半定量、定量转变,解决了丛式井组集成化排采和水平井下倾排采难题,有效提高了单井产量和煤层气采收率;(4) 围绕稳产增产储备技术方面,创新提出包括大直径水平井应力释放采气、煤层气可控温注氮驱替增产等技术,为实现煤层气二次开发提供了技术储备。针对我国煤层气产业处于“爬坡期”和“战略机遇期”的阶段特点,围绕“碳达峰碳中和”目标背景,在系统梳理目前亟需解决的技术难题基础上,提出我国煤层气产业“两步走”发展战略:到2025年实现理论与技术新突破,达到国家“十四五”规划年产100×108 m3目标,坚定产业发展信心;到2030年形成针对我国不同地质条件的适用性技术,达到年产300×108 m3目标,成为天然气总产量的重要组成部分。相应对策是:从技术和管理2个维度,按照资源、技术、人才、政策和投资等五大要素,遵循“技术突破为核心、五位一体、协同创新”原则,研究制定并落实配套保障措施,并从高效开发和提高单井产量两方面,提出关系煤层气产业未来发展9方面的理论研究及技术攻关方向,以满足实现煤层气产业高质量发展的目标。

     

  • 图  1  碎软煤间接压裂技术

    Fig. 1  Indirect fracturing technology of crushed soft coal

    图  2  裂隙多为方解石填充的深部(层)煤岩心

    Fig. 2  Fractures of the deep coal core mostly filled with calcite

    图  3  酸液浸泡深部(层)煤储层岩心前后扫描电镜结果

    Fig. 3  Scanning results of electron microscope scanning before and after acid immersion of the deep coal core

    图  4  多目标最优化定量化排采技术路线

    Fig. 4  Technical roadmap of multi-objective optimization quantitative drainage and production

    图  5  液压多机联动柱塞泵排采设备应用效果

    Fig. 5  Application effect of hydraulic multi-machine linkage plunger pump drainage and production equipment

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  • 收稿日期:  2021-12-06
  • 修回日期:  2021-12-17
  • 刊出日期:  2022-03-01
  • 网络出版日期:  2022-03-04

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