Abstract: The first giant gas field-Sulig gas field and Qinshui gas field in Shanxi province come out with in China in resent years, their gas producing zones Carboniferous Permian when deposited could be div ided into the northern, central and southern belts like craton block of North China platform，and have broad source conditions. During Indosinian, Yanshan and Himalayan movements，the North China's craton was separated into six blocks，forming very different conditions of hydrocarbon migration and accumulation. W here the structures were simple and Triassic covers Carboniferous-Permian， gas fields or pools were favorably protected. It is concluded that in Erdos and Qinshui areas should perform further ex ploration; in Bohai Bay basin should pay attention to in-depth study of secondary hydrocarbon generation and migration; in Fraghe gdbenibasiou ewby lobaotrhioimus ibrgaklooggh hlpaigslfos sesprospecting.

Key words: North China platform, craton, coal-formed gas, secondary migration, deep basin, gas pool, Carboniferous, Permian