| Basin | Geology | Geochemistry | | Basin type | Sed. background | Formation | Depth/
m | Area/
km2 | Net coal seams/m | Gas genesis | C1 isotope/
‰ | Ro/
% | Coal rank | | Qinshui | Cratonic | Transitional | Carboniferous-Permian | 300-2 000 | 5 000 | 4-17 | Thermal | -31.95 | 1.5-3.0 | Thin coal, lean coal, anthracite | | Ordos | Cratonic | Transitional | Carboniferous-Permian | 600-2 000 | 10 000 | 5-18 | Thermal | -32.41 | 1.2-2.8 | Coking coal, lean coal | | Fenhe | Foreland | Swamp | Paleogene | 60-760 | 3 300 | 24-45 | Biogenetic | -62.33 | 0.3-0.4 | Subbituminous coal | | San Juan | Foreland | Transitional | Cretaceous | 150-1 200 | 1 900 | 9-21 | Thermal and less biogenetic | -41.12 | 0.3-1.3 | High and low volatile bituminous coal | | Basin | Reservoir | Fluid | Resource | Production | | Pore | Permeability/
10-3 μm2 | Pressure coefficient | CH4/% | Gas/
(m3·t-1) | Recoverable resources/
108 m3 | Abundance/
(108 m3?km-2) | Production/well/
(104 m3·d-1) | Yearly production/108 m3 | | Qinshui | Nano-pores | 0.01-5.75 | 0.7-0.9 | 98.87 | 4.0-32.0 | 6 064 | 1.2 | 0.2-0.3 | 30.9 | | Ordos | Nano-pores | 0.02-16.17 | 0.8-1.0 | 90.80 | 4.0-20.0 | 11 481 | 1.1 | 0.2-0.7 | 10.4 | | Fenhe | Nano-pores | 35.00-1 000.00 | 0.9-1.0 | 98.60 | 0.8-1.6 | 6 600 | 2.0 | 0.5-0.6 | 145.0 | | San Joan | Nano-pores | 5.00-60.00 | 1.0-1.2 | 97.00 | 10.0-12.7 | 3 800 | 2.0 | 1.0-3.0 | 150.0 |
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