摘要
为探究淮南煤田新集二矿深部煤系地层生烃演化过程及瓦斯地质分布规律,基于矿井瓦斯实测地质资料,重建下二叠统山西组构造-埋藏、热演化、生烃演化过程,分析1#煤层瓦斯生成和逸散过程、瓦斯分布特征及主控因素。结果表明:1#煤层经历了“V”型埋藏过程,印支期末达到最大埋藏,约3740 m,形成了大量的瓦斯;期后一直处于不断抬升剥蚀、瓦斯缓慢逸散过程;1#煤中瓦斯的含量与压力整体上随深度增加而增大,-600 m水平煤层的瓦斯含量超过5.0 m 3/t,瓦斯压力达到0.74 MPa;综合指出1#煤层在-600 m以深存在煤与瓦斯突出危险性。
This paper aims to investigate a deeper understanding about the hydrocarbon generation evolution process and the gas geological distribution law behind deep coal-bearing stratum in Xinji No.2 Mine in Huainan Coalfield.The study involves reconstructing and analyzing the structural-burial,thermal evolution and hydrocarbon generation evolution processes of the lower permian in Shanxi formation based on the measured geological data of mine gas,and conducting a systematic study on the gas generation and escaping process,gas distribution characteristics and main controlling factors of No.1 coal seam.The results show that the burial process of 1 coal seam shows a"V"type,and reaches the maximum burial depth about 3740 m at the end of Indo-Chinese epoch,forming a large amount of gas,and following a process of continuous uplift and erosion,and slow escape of the gas.The gas content and pressure in 1 coal seam generally increase with depth.When the coal seam depth reaches 600 m,the gas content exceeds 5.0 m 3/t and the gas pressure reaches 0.74 MPa.The study points out that there is a risk of coal and gas outburst in No.1 coal seam at a depth of-600 m.
作者
汪有清
周鹏举
朱炎铭
钟宝元
温希坤
宋昱
Wang Youqing;Zhou Pengju;Zhu Yanming;Zhong Baoyuan;Wen Xikun;Song Yu(Xinji No.2 Mine,China Coal Xinji Energy Co.Ltd.,Huainan 232000,China;Key Laboratory of Coalbed Methane Reservoir&Reservoir Formation on Process,Ministry of Education,China University of Mining&Technology,Xuzhou221008,China;School of Resources&Geosciences,China University of Mining&Technology,Xuzhou 221116,China)
出处
《黑龙江科技大学学报》
2025年第2期198-203,共6页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金项目(52274103)。
关键词
瓦斯涌出
构造-埋藏
地质控制
生烃演化
gas outburst
structure-burial
geological control
hydrocarbon generation evolution
