摘要
By the analysis of formation conditions of large and medium gas fields in China, supplying gas ability of source rock, transporting gas ability of transporting pathway and sealing gas ability of cap rock were considered to be 3 main factors controlling formation of large and medium gas fields. By the study on the relation between comprehensive and quantitative evaluation value for main controlling factors of large and medium gas fields in China and gas reserves abundance, it was considered to have a direct relation. Gas reserves abundance increases with the comprehensive and quantitative evaluation value of main controlling factors of gas reservoirs, conversely the smaller.To form large and medium gas fields with high reserves abundance, comprehensive evaluation grade of main controlling factors of gas reservoirs should be good. To form large and medium gas fields with medium reserves abundance, comprehensive evaluation grade of main controlling factors of gas reservoirs should be middle.