淮南矿区松软低渗煤层地面瓦斯治理技术研究与应用

doi:10.13809/j.cnki.cn32-1825/te.2025.06.012

油气藏评价与开发 ›› 2025, Vol. 15 ›› Issue (6): 1061-1069.doi: 10.13809/j.cnki.cn32-1825/te.2025.06.012

淮南矿区松软低渗煤层地面瓦斯治理技术研究与应用

彭煜敏¹(), 丁华忠¹, 丁同福¹(), 苏雷¹, 童碧¹, 荚胜丰¹, 陈本良², 唐勇敢¹, 刘超¹, 袁广¹, 罗荣道¹, 张明志¹, 高萌¹

1.淮南矿业集团煤层气开发利用有限责任公司，安徽淮南 232000
2.煤炭开采国家工程技术研究院，安徽淮南 232000

收稿日期:2024-09-06 发布日期:2025-10-24 出版日期:2025-12-26
通讯作者: 丁同福（1967—），男，硕士，正高级工程师，从事煤田地质和矿井地质技术研究。地址：安徽省淮南市潘集区夹沟镇淮南矿业集团煤层气开发利用有限责任公司，邮政编码：232000。E-mail：dingtongfu@163.com
作者简介:彭煜敏（1998—），女，本科，助理工程师，从事煤矿区煤层气（瓦斯）抽采研究。地址：安徽省淮南市潘集区夹沟镇淮南矿业集团煤层气开发利用有限责任公司，邮政编码：232000。E-mail：361480371@qq.com
基金资助:
国家科技重大专项“深部煤层CO2高效存储利用与安全监测技术”(2024ZD1004106);安徽省公益性地质工作项目“两淮矿区重点区域煤层气储层可改造性调查评价 ”(2024-g-1-6)

Research and application of surface gas control technology for soft and low-permeability coal seams in Huainan mining area

PENG Yumin¹(), DING Huazhong¹, DING Tongfu¹(), SU Lei¹, TONG Bi¹, JIA Shengfeng¹, CHEN Benliang², TANG Yonggan¹, LIU Chao¹, YUAN Guang¹, LUO Rongdao¹, ZHANG Mingzhi¹, GAO Meng¹

1. Huainan Mining Group Coalbed Methane Development and Utilization Co. , Ltd. , Huainan, Anhui 232000, China
2. National Engineering & Technology Academy for Coal Mining, Huainan, Anhui 232000, China

Received:2024-09-06 Online:2025-10-24 Published:2025-12-26

摘要/Abstract

摘要：

淮南矿区地处中国陆地东西构造带与南北构造带交汇的前端，地质构造极为复杂，经过一系列构造演化，导致煤体破碎、松软，具有高瓦斯、高地压、高地温、高承压水、松软低渗“四高一松软”的特征。随着淮南矿区开采深度逐年增大，瓦斯灾害的复杂性和危险性显著增加，井下瓦斯治理工程与生产接替之间的矛盾更加突出。煤矿瓦斯治理与煤炭开采密切相关，通过地面瓦斯治理井预抽煤矿瓦斯能有效扼制瓦斯灾害事故，提高煤炭安全生产效率。以煤矿5~10 a规划设计的开采区为单元，地面瓦斯治理井沿采煤工作面轨顺、运顺内错30~40 m钻进，覆盖设计的全部采煤工作面。采用三开完井方式、旋转下套管技术、酸性压裂液体系大规模压裂、有杆无杆排采工艺组合应用等手段，实现了工程成功率100%、压裂最高砂比20%、单井最高日产气量11 067 m³的效果。经煤矿井下验证，13-1煤层65、30 m范围内的原始瓦斯压力由6.8 MPa分别降至2.7、2.4 MPa，瓦斯由11.8 m³/t分别降至7.2、5.2 m³/t，地面瓦斯治理井压裂抽排对降低煤层瓦斯压力、瓦斯含量效果明显。实施地面瓦斯治理有利于煤矿安全生产、有利于优化能源结构、有利于碳减排，打造地面瓦斯治理示范区，对中国松软低渗煤层地质条件下实施地面瓦斯治理具有极大的借鉴意义。

关键词: 淮南矿区, 松软低渗, 地面瓦斯治理, 旋转下套管技术, 煤矿井下验证

Abstract:

The Huainan mining area is located at the forefront of the intersection of the east-west and north-south tectonic zones in China, with extremely complex geological structures. After a series of tectonic evolution, the coal seams have become fragmented and soft, characterized by “four highs and one softness”: high gas content, high formation pressure, high geothermal temperature, high confined water pressure, and soft and low-permeability coal. As the depth of mining in the Huainan mining area increases year by year, the complexity and hazard of gas disasters have significantly increased, leading to a more prominent contradiction between underground gas control engineering and production succession. Coal mine gas control and coal mining are closely related. Pre-extracting gas through surface gas control wells can effectively prevent gas-related accidents and improve the efficiency of coal safety production. Taking coal mining areas planned for 5 to 10 years as units, surface gas control wells were drilled along the coal mining working face following the track and transportation directions, with an offset of 30~40 m, covering all the designed working faces. Using a three-drilling completion method, rotary casing technology, large-scale fracturing with acidic fracturing fluid system, and drainage and production technology combined with and without sucker rod, the project achieved a 100% success rate, the highest sand ratio of 20% during fracturing, and the highest daily gas production of 11 067 m³ per well. Through verification in the underground coal mines, the original gas pressure in the 13-1 coal seam within the ranges of 65 m and 30 m reduced from 6.8 MPa to 2.7 MPa and 2.4 MPa, respectively, and the gas content decreased from 11.8 m³/t to 7.2 m³/t and 5.2 m³/t, respectively. The fracturing and drainage technology of surface gas control wells had significant effects on reducing the gas pressure and gas content of the coal seam. The implementation of surface gas control technology is beneficial to coal mine safety, energy structure optimization, and carbon emission reduction. Establishing a demonstration area for surface gas control offers valuable insights for implementing surface gas control technology in soft and low-permeability coal seams under geological conditions in China.

Key words: Huainan mining area, soft and low-permeability coal, surface gas control, rotary casing technology, underground coal mine validation

中图分类号:

TE37

彭煜敏,丁华忠,丁同福, 等. 淮南矿区松软低渗煤层地面瓦斯治理技术研究与应用[J]. 油气藏评价与开发, 2025, 15(6): 1061-1069.

PENG Yumin,DING Huazhong,DING Tongfu, et al. Research and application of surface gas control technology for soft and low-permeability coal seams in Huainan mining area[J]. Petroleum Reservoir Evaluation and Development, 2025, 15(6): 1061-1069.

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淮南矿区松软低渗煤层地面瓦斯治理技术研究与应用

Research and application of surface gas control technology for soft and low-permeability coal seams in Huainan mining area

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