关键词: 有机质, 生物气, 生化动力学模型, 生气期评价, 生气速率, 动力学参数, 柴达木盆地

Abstract: The anaerobic fermentation method which was used in appraisement of biogenic gas resource failed to reflect or describe the gas generation period.In consideration of this tough problem,the biochemical kinetic model of biogenic gas generated from organic matter was established according to the biochemical kinetic theory.The kinetic parameters were calibrated by the data of simulation experiment. In consideration of the influences of the bacterium concentration and temperature on the kinetic parameters,the biochemical kinetic model with the kinetic parameters was applied in Qaidam Basin.The result shows that the biogenic gas generation rate increases with the buried depth firstly and then decreases when the rate reaches to the maximum corresponding to the buried depth of 600m.This conclusion is similar to the previous studied result,which shows that this model under consideration of the influences of bacterium concentration and temperature on the kinetic parameters can be used to appraise the biogenic gas generation period.

Key words: organic matters, biogenic gas, biochemical kinetic model, gas generation period appraisal, gas generation rate, kinetics parameter, Qaidam Basin