Distribution of shallow water delta sand bodies and the genesis of thick layer sand bodies of the Triassic Yanchang Formation, Longdong Area, Ordos Basin

LIU Hanlin,QIU Zhen,XU Liming,WANG Fengqin,TONG Qiang,LIN Jiahao,YIN Shuai,WANG Wenqiang

Fig. 2. Granularity characteristics and sedimentary facies distribution of shallow water delta in Chang 82 sub-member of Longdong area, Ordos Basin. (a) Well Y42, 1995.8 m, two-segment granularity probability cumulative curve; (b) Well Q96, 2256.6 m, three-segment granularity probability cumulative curve; (c) lake shoreline distribution and plane distribution of sedimentary facies.