平顶山矿区煤层气赋存特征及开发潜力

Coalbed Methane Possession Characteristics and Developing Potential of Pingdingshan Mine Area

平顶山矿区二1煤层富含煤层甲烷气体，其资源量估算达302亿m3以上．本文通过对控制煤层气赋存的二1煤层的传层几何形态、地质特征、煤质变化、特别是物性特征的研究，指出本区二1煤层渗透性较好，渗透率随着围限压力增加而降低，且与判及发育程度、构造应力变化有密切关系．而二1煤层中的煤层气含量与煤层理深有着密切关系，随着深度增加而增加．通过综合分析指出了开发潜力较好的区块．

The coalbed methane content is high in coal seam No.21 of Pingdingshan mine area.The amount of coalbed methane resource is 30.2 billion m3. Through the research on reservoir's geometric shape, geological characteristics, changes of coal qualities and especially the physical properties which control the coalbed methane's possession, it is found that the permeability of coal seam No. 21 is better. The permeability decreases as the surrounding pressure increases, and it has close relationship to cleats' developmeni and tectonic stress. Whereas the coalbed methane content in coal seam No. 21 has close relationship to the burial depth. As the burial depth increase,the gas content increase. The segment with the highest developing potential are pointed out through the synthetic analysis.