Accumulation conditions and exploration directions of Ordovician lower assemblage natural gas, Ordos Basin, NW China

XU Wanglin,LI Jianzhong,LIU Xinshe,LI Ningxi,ZHANG Caili,ZHANG Yueqiao,FU Ling,BAI Ying,HUANG Zhengliang,GAO Jianrong,SUN Yuanshi,SONG Wei

Fig. 4. Logarithmic correlation of component ratio of Paleozoic gas (the chart is based on the reference [18]).