Search

Based on the Kaiping coalfield gas geology research, using the method of hierarchical tectonic control theory, this paper systematically researched control action of different levels of tectonic activity on gas occurrence of kaiping coalfield. The results show that except coals with once coal generation process in NW part of Kaiping syncline, coals go through twice coal generation processes in other parts, because of the influences of thrust nappe structure and magmatic intrusion. Tectonic development inhomogeneity of Kaiping leads to coal the difference of gas occurrence. Due to the sealing role of reverse faults and water, there are good gas storage conditions in NW part, while gas loses too much in SE part because of the dissipation role of normal faults and water. Different tectonic evolution and tectonic types have different effects on coal heterogeneity. With different coal metamorphic grade and deformation characteristics in the local, there are different pore-fracture features, which leads to different gas-bearing properties. [ABSTRACT FROM AUTHOR]