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). |