In Situ Stress Distribution and Its Control on the Coalbed Methane Reservoir Permeability in Liulin Area, Eastern Ordos Basin, China

Figure 2

Injection/falloff curves of an actual CBM well: (a) relationship between pressure/temperature and time; (b) the relationship between the injection rate at the surface and time: represents the total injection volume, represents the average injection rate at the surface, represents the pressure, represents the maximum injection pressure at the surface, represents the time, represents the injection time, represents the well shut-in time, and represents the coal reservoir temperature.