本文测量了一种澳大利亚煤的膨胀率以及相应的渗透率的变化。当二氧化碳压力达到14MPa的时候,此种煤轴向的应变达到1%,同时渗透率缩小了10倍。本文同时使用了储量模拟软件评估煤的膨胀对二氧化碳注入和煤层气生产速度的影响。计算结果显示煤膨胀率,以及煤层的初始渗透率、初始空隙率对气体流速影响重大。 This article measures the rate of expansion of an Australian coal and the corresponding change in permeability. When the carbon dioxide pressure reaches 14MPa, the axial strain of this coal reaches 1% while the permeability is reduced by 10 times. This article also uses reserve simulation software to evaluate the effect of coal expansion on CO 2 injection and CBM production rates. The calculation results show that the coal expansion rate, as well as the initial permeability of the coal seam, the initial porosity greatly affect the gas flow rate.