Changes

==CBM Storage==

==CBM Storage==

Trap mecanism of CBM different with gas conventional. In gas conventional, gas trap in porosity of rock. But in CBM, methane trap in microporosity of coal. This microporosity have capasity to store gas six times more than conventional gas. This microporosity created when coal began coalification process. When temperature and pressure of coal increase, matrix in coal decrease create micro pore that trap methane. The increase fracture also making fracture or cleats in coal, so making permeability in coal (Figure 2).  

Trap mecanism of CBM different with gas conventional. In gas conventional, gas trap in porosity of rock. But in CBM, methane trap in microporosity of coal. This microporosity have capasity to store gas six times more than conventional gas. This microporosity created when coal began coalification process. When temperature and pressure of coal increase, matrix in coal decrease create micro pore that trap methane. The increase [[fracture]] also making fracture or cleats in coal, so making permeability in coal (Figure 2).  

[[File:Figure 2 trap mechanism.JPG|500px|thumbnail|center|Figure 2 Trap Mechanism. Adapted from Al-Jubari<ref>Al-Jubary et al. 2009. ''Oilfield Review Summer 2009''.21: Schlumberger</ref>]]  

[[File:Figure 2 trap mechanism.JPG|500px|thumbnail|center|Figure 2 Trap Mechanism. Adapted from Al-Jubari<ref>Al-Jubary et al. 2009. ''Oilfield Review Summer 2009''.21: Schlumberger</ref>]]