Relationships of the iC4/nC4 and iC5/nC5 ratios with maturity of coal-derived gases of Triassic Xujiahe Formation in central Sichuan Basin, SW China
QIN Shengfei,HUANG Chunhu,ZHANG Benjian,YANG Yu,YUAN Miao
Fig. 1. Distribution of the Xujiahe Formation gas fields and petroleum system in the Central Sichuan Basin.