STUDY OF GAS-DISSOLVING IN COALBED WATER AND PREDICTION OF GAS CONTENT OF LIGNITE RESERVOIR
煤储层水溶气研究及褐煤含气量预测

Based on physical simulates of methane-solubility in water of different minefields and coalbed water, gas-dissolving in the lignite re servoir of Hailaer basin in Neimenggu municipality were calculated. Based on triaxiality compress experiments of three-phase medium coal rocks, i.e. coal matrix, gas and water, integrated into state equation of ideal gas and Malueta law, free gas in the lignite reservoir were calculated. Based on isothermal methane-adsorbing experiments under equilibrium moisture, gas-adsorbing in the lignite reservoir were estimated. At last, taking Hailaer basin as an example, total gas content in the lignite reservoir were predicted.