张群,降文萍,姜在炳,等. 我国煤矿区煤层气地面开发现状及技术研究进展[J]. 煤田地质与勘探,2023,51(1):139−158. DOI: 10.12363/issn.1001-1986.22.05.0400
引用本文: 张群,降文萍,姜在炳,等. 我国煤矿区煤层气地面开发现状及技术研究进展[J]. 煤田地质与勘探,2023,51(1):139−158. DOI: 10.12363/issn.1001-1986.22.05.0400
ZHANG Qun,JIANG Wenping,JIANG Zaibing,et al. Present situation and technical research progress of coalbed methane surface development in coal mining areas of China[J]. Coal Geology & Exploration,2023,51(1):139−158. DOI: 10.12363/issn.1001-1986.22.05.0400
Citation: ZHANG Qun,JIANG Wenping,JIANG Zaibing,et al. Present situation and technical research progress of coalbed methane surface development in coal mining areas of China[J]. Coal Geology & Exploration,2023,51(1):139−158. DOI: 10.12363/issn.1001-1986.22.05.0400

我国煤矿区煤层气地面开发现状及技术研究进展

Present situation and technical research progress of coalbed methane surface development in coal mining areas of China

  • 摘要: 回顾了我国煤炭企业组织实施和合作开展的煤矿区煤层气勘探开发进程。经过三十多年攻坚克难、不懈努力,我国煤矿区煤层气地面开发技术研究、工程试验和产业发展均取得了可喜的成绩,不仅在山西晋城矿区首次取得国内外无烟煤的煤层气开发成功,实现了煤层气规模化商业化生产,而且在安徽淮北矿区取得了碎软低渗煤层顶板水平井开发煤层气技术的重大突破,实现了碎软低渗煤层的煤层气水平井单井的高产稳产;煤矿区采动区煤层气井开发在安徽淮北、淮南,山西晋城等矿区实现了规模化工程应用。同时,梳理总结了依托“十一五”—“十三五”国家科技重大专项项目,在煤矿区煤层气地面开发理论及技术研究方面取得的主要成果及其应用效果,包括:煤层气井密闭取心技术与设备、碎软低渗煤层地面煤层气垂直井强化增产技术、碎软低渗煤层顶板和煤层水平井分段压裂开发技术、多煤层分层控压合层排采技术、低煤阶低气含量煤层地面煤层气开发技术、煤层气井极小半径多孔旋转射流侧钻水平井技术,以及煤矿采动区煤层气产量预测技术等。在此基础上,根据全国煤矿区煤炭开采发展趋势和需求,提出今后煤矿区煤层气研究应重点关注3个方向:穿浅部采空区/采动区的深部煤层气与煤炭资源协调开发、低煤阶低气含量厚煤层矿区煤层气与煤炭资源协调开发和废弃/关闭矿井煤层气开发等。

     

    Abstract: The exploration and development process of coalbed methane (CBM) in coal mining areas, which was implemented under the organization and cooperation of the coal enterprises in China, was reviewed in this paper. After more than 30 years of hard work and unremitting efforts, gratifying achievements have been made in the research, engineering experiments and industrial development on CBM surface development technology, including the successful CBM development of anthracite coal in Jincheng mining area, Shanxi Province, for the first time at home and abroad, the largescale commercial production of CBM, the major breakthrough made in the CBM development technology by horizontal wells in the roof of broken soft coal seam with low permeability in Huaibei mining area, Anhui Province, and the high and stable production of CBM in single horizontal well of broken soft coal seam with low permeability production. Besides, CBM well development in the active mining area of coal mine has been developed as large-scale engineering application in Huaibei, Huainan, Jincheng and other mining areas. At the same time, the main achievements and application results of the theoretical and technical research on CBM surface development in coal mining areas based on the major national science and technology projects from the 11th to the 13th five-year plans were summarized, such as the technology and equipment of sealed coring for CBM well, the enhanced production technology of surface vertical CBM well in broken soft coal seam with low permeability, the staged fracturing development technology in the roof and horizontal well of broken soft coal seam with low permeability, the stratified pressure control and multilayer gas drainage technology in multi-seam, the development technology of surface CBM in low rank coal seam with low gas content, the multi-hole rotary jet sidetracking technology of horizontal CBM well with tight radius and the prediction technology of CBM production in active mining area of coal mine. On this basis, according to the coal mining development trend and demand in the coal mining areas in China, it is pointed out that the future CBM research in coal mining area should focus on the following three aspects: the coordinated development of deep CBM and coal resources by way of the shallow goaf and active mining area, the coordinated development of CBM and coal resources in thick low-rank coal mining area with low gas content, and the CBM development in the abandoned/closed mine.

     

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