Factors controlling the reservoir accumulation of Triassic Chang 6 Member in Jiyuan-Wuqi area, Ordos Basin, NW China

CHEN Shijia,LEI Junjie,LIU Chun,YAO Jingli,LI Yong,LI Shixiang,SU Kaiming,XIAO Zhenglu

Table 1 Development degree of interlayers in Chang6 of different blocks in Jiyuan-Wuqi area.

Area Thickness/m Average stratification coefficient Intercalation layer number Barrier layer number Frequency of interlayer Oil satura- tion/% Number of well Western 123.8 10.80 6.8 5.26 0.097 37.6 107 Middle 121.3 13.20 8.5 7.38 0.131 18.1 56 Eastern 122.7 9.78 5.7 5.85 0.094 32.3 92