Eogenetic karst and its control on reservoirs in the Ordovician Majiagou Formation, eastern Sulige gas field, Ordos Basin, NW China
XIE Kang,TAN Xiucheng,FENG Min,WANG Baobao,ZHONG Shoukang,YANG Mengying,NIE Wancai,QIAO Zhanfeng,ZENG Wei
Fig. 4. Types of upward-shallowing sequences in the M54-M51 sub-members in eastern Sulige gas field (GR—natural gamma ray, API).