Reconstruction and petroleum geological significance of lithofacies paleogeography and paleokarst geomorphology of the Middle Permian Maokou Formation in northwestern Sichuan Basin, SW China

ZHONG Yuan,YANG Yueming,WEN Long,LUO Bing,XIAO Di,LI Minglong,CHEN Cong,ZHAO Like,LU Feifan,TAN Xiucheng

Fig. 6. The sequence boundary between LSC3 and Wujiaping Formation. (a) Stratigraphic column of Well YB224; (b) Stratigraphic column of Well L17; (c) Imaging log of Well YB224; (d) Imaging log of Well YB3. w(K)—potassium content by gamma spectrometry log; w(Th)—thorium content by gamma spectrometry log; w(U)—uranium content by gamma spectrometry log.