Evolution of Ordovician YJ1X ultra-deep oil reservoir in the Yuecan oilfield, Tarim Basin, NW China

YANG Peng,LIU Keyu,LI Zhen,MCINNES Brent Ian Alexander,LIU Jianliang

Fig. 7. Petrographic characteristics of calcite cement types in the study area. (a) Well SB5, 7427.30 m, O2yj, occurrence and paragenesis relationship of C1 and C2 calcite cements, transmitted light; (b) Well SB5, 7427.30 m, O2yj, occurrence and paragenesis relationship of C1 and C2 calcite cements, cathodoluminescence.