Measurement of gas diffusion coefficient and analysis of influencing factors for Shaanxi Debao coalbed methane reservoir in China

Abstract Shanxi Debao has affluent coalbed methane (CBM) reservoir in China. Understanding its characteristics, especially the diffusion characteristics of natural gas coal seam, is key data CBM development this block. In paper, a method measuring coefficient and rock by adsorption proposed using experimental method. The calculation model for calculating established according to amount, correlation under different pressures, water saturation temperatures established. results show that it feasible calculate capacity rock. With increase pressure, increases, increases. While decreases, temperature calculated could provide guidance future Province,