Characteristics and genesis of vertical heterogeneity in a coal seam of the Carboniferous Benxi Formation， eastern Ordos Basin： A case study of well M172
Xiaobing NIU, Hui ZHANG, Huaichang WANG, Jianling HU, Chenjun WU, Weibo ZHAO, Bo PAN
Oil & Gas Geology . 2024, (6): 1577 -1589 .  DOI: 10.11743/ogg20240606