Organic enclosure is the direct indicator of hydrocarbon generation

migration

accumulation and evolution. This paper discussed the properties of organic enclosures in different diagenesis stages from the Second Member of the Lower Triassic Jialingjiang Formation and determined the time

depth

direction

passage

phase state of migration and source of the gas. Five indicators

namely the type

amount

temperature

paleosalinity and constituent of the organic enclosures for the pool-forming assessment of natural gas pools are proposed based on typic dissection and contrast. Studying gas migration with organic enclosures

a comprehensive dynamic research in connection time with space could be made and the examinational results of Huangcaoxia gas pools are pretty well.