Origin and migration model of natural gas in L gas field, eastern slope of Yinggehai Sag, China

YANG Jihai,HUANG Baojia

Fig. 5. Correlation of inorganic CO2 gases to potential source-rocks based on their carbon isotopic compositions. (a) Inorganic CO2 of gas in L gas field (8 samples); (b) Carbonate minerals of Miocene and Oligocene (25 samples) in Yinggehai basin; (c) Basement carbonates in Yingdong slope: limestone & dolomite (2 samples).