Unconventional Coalbed Methane Reservoirs Characterization Using Magnetic Susceptibility

This research describes a study of the magnetic susceptibility (MS) and permeability as a new approach for a non-destructive coalbed methane (CBM) reservoir characterization. Experimental measurements were undertaken in CBM cores from Kazakhstan (Karaganda Basin). The experimental results showed a strong correspondence between measured magnetic susceptibility and permeability of the CBM core samples. Inverse correlation between magnetic susceptibility and permeability is observed. Generally, the high values of MS correspond to low permeability, likewise the low diamagnetic MS relates to high permeability of production zones. In case of fracturing permeability must be recalculated in relation to the degree of fracturing.