Research on Main Geological Controls and Enrichment Model of Coalbed Methane Distribution in China

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Wang, Kexin^1

Suzhou Science and Technology Town Foreign Language School, Suzhou, China^1

关键词: Adsorption capacities;    Comprehensive controls;    Geological control;    Geological factors;    Geological structures;    Hydrogeological conditions;    Magmatic activity;    Sedimentary environment;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022071/pdf
DOI  :  10.1088/1755-1315/300/2/022071

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The distribution and enrichment of coalbed methane in China are controlled by various geological factors. A systematic study has been carried out on six aspects: geological structure conditions, burial depth, hydrogeological conditions, sedimentary environment, physical properties and magmatic activities of coalbed methane. The results show that tectonic subsidence, hydraulic sealing and gas control, reverse faults and synclinal core are controlled by structural subsidence, hydraulic sealing and gas control. It is advantageous to CBM occurrence; tectonic uplifting, hydraulic migration and dissipation, normal faults, anticlinal core and subsidence pillars are disadvantageous to CBM occurrence; with the increase of coal seam burial depth, the adsorption capacity of CBM increases gradually, and decreases after the critical burial depth; the thicker the thickness of coal seam roof and floor, the more dense of the lithology, the more favorable to CBM preservation; the content of CBM is positively correlated with coal thickness. According to the influence degree of geological factors, the distribution and occurrence of coalbed methane can be summarized as two types: comprehensive control of multiple factors and main control of one or two factors.