为评价我国气、肥煤煤层气开发潜力,在全国范围收集了81件气、肥煤煤样的工业分析、显微煤岩组分数据,并进行了孔隙度、压汞和等温吸附测试,结果表明:我国气、肥煤多属于特低灰煤,气、肥煤各阶段孔隙发育较平衡,微孔最发育,其次为大孔和过渡孔.总比孔容和孔隙度随煤变质程度增加先减小后增大:0.65％＜Rp.max＜0.90％时,气、肥煤孔容和孔隙度随煤化程度增大而减小,在Ro,max=0.90％附近达到最小值,0.90％ ＜Ro.max＜1.20％时,孔容和孔隙度随煤化程度增加而增大.我国气、肥煤煤层气资源量丰富,储层灰分低,各阶段孔隙发育平衡,具良好的煤层气资源开发潜力.%In order to evaluate the coalbed methane development potential of the gas coal and fat coal in China,the proximate analysis and macerals data of 81 gas and fat coal samples were collected from the national scope.The tests were conducted on the porosity,mercury injection and other isothermal adsorption.The results showed that the gas coal and fat coal in China mostly were the ultra low ash coal.The crack development of the gas coal and fat coal at each stage would be balance,the micropore of the gas coal and fat coal would be best developed and the large pore and the transition pore would be the second.The total specific pore volume and the porosity would be firstly reduced and then increased with the coal metamorphic degree increased.When 0.65％＜R ＜0.90％,the total specific pore volume and the porosity of the gas coal and fat coal would be decreased with the degree of coalification increased.When R =0.90％,the minimum would be reached.When 0.90％＜R ＜ 1.20％,the total specific pore volume and the porosity would be increased with the degree of coalification increased.The coalbed methane resources of the gas coal and fat coal are rich in China,the ash content of the reservoir would be low,the pore development at each stage would be balanced and the development potential of the coalbed methane would be excellent.
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