阜康区块八道湾组煤矿构造特征与煤层气赋存状态研究

    Research on the structural characteristics and coalbed methane occurrence state of the Badaowan Formation coal mine in Fukang Block

    • 摘要: 本文以新疆阜康区块八道湾组煤矿为研究对象,通过地质调查、钻孔资料分析及煤岩测试等方法,系统研究了区内构造特征及其对煤层气赋存状态的控制作用。研究结果表明,阜康区块经历多期构造运动,形成了以逆冲断裂和宽缓褶皱为主的构造格局,八道湾组煤层受构造改造显著,其赋存状态与断裂、褶皱发育特征密切相关。煤层气赋存受煤岩物理性质、构造应力及水文地质条件共同控制,区内断裂带附近煤层气含量呈现“先增后减”的规律,向斜构造轴部具备较好的煤层气封存条件。研究成果为阜康区块煤层气资源勘探开发及煤矿瓦斯防治提供了地质依据。

       

      Abstract: This paper takes the Badaowan Formation coal mine in Fukang Block, Xinjiang as the research object. Through geological survey, drilling data analysis, and coal rock testing methods, the structural characteristics of the area and their control over the occurrence of coalbed methane are systematically studied. The results indicate that the Fukang Block has undergone multiple tectonic movements, forming a structural pattern dominated by thrust faults and wide and gentle folds. The coal seams of the Badaowan Formation have undergone significant structural transformation, and their occurrence state is closely related to the development characteristics of faults and folds. The occurrence of coalbed methane is jointly controlled by the physical properties of coal rock, structural stress, and hydrogeological conditions. The coalbed methane content near the fault zone in the area shows a pattern of “first increasing and then decreasing”, and the axial part of the inclined structure has good coalbed methane storage conditions. The research results provide geological basis for the exploration and development of coalbed methane resources and coal mine gas prevention and control in Fukang Block.

       

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