Analysis of multi-coalbed CBM development methods in western Guizhou, China

Characteristics of in situ stress and its influence on coal seam permeability in the Liupanshui Coalfield, Western Guizhou

“…15 Tectonic activities during the Yanshanian and Himalayan led to the disintegration of the prototype basin, and formed a large number of synclines and synclinoria, which became important coalcontrolling structures in this area (Figure 1). 16,17 These coalbearing synclines are ideal for the commercial development of CBM in southwestern China.…”

Influence of supercritical, liquid, and gaseous CO2 on fracture behavior in sandstone

“…Shanxi has the largest coal bed methane reserves, accounting for 91.5% of the national total. [20][21][22] Rock is damaged and destroyed to varying degrees under the influence of geological processes such as in situ stress, [23][24][25][26] temperature, 27,28 and hydrochemical corrosion. 29 For example, Ma et al 29 used the Forchheimer coefficient as an index to investigate the influencing mechanism of erosion on the nonlinear hydraulic properties of the broken red sandstones.…”

“…These reserves are mainly concentrated in the Shanxi, Shaanxi, and Guizhou provinces. Shanxi has the largest coal bed methane reserves, accounting for 91.5% of the national total 20‐22 …”

Numerical analysis of drainage rate for multilayer drainage coalbed methane well group in Southern Qinshui basin

“…Therefore, the inability to effectively extend the pressure drop and drainage radius makes it impossible for the long-term sustained production from the CBM well (Chen et al., 2019b; Zhang et al., 2019; Zhao et al., 2008). Furthermore, during multilayer drainage, coal seams exhibit pressure differences, which can lead to mutual interference, and not all coal seams have the capacity to contribute to fluid supply (Chen et al., 2018; Ni et al., 2010; Yang et al., 2019). These factors further increase the difficulty of controlling production in multilayer drainage CBM wells.…”