Diagenetic evolution and formation mechanisms of middle to deep clastic reservoirs in the Nanpu sag, Bohai Bay Basin, East China

WANG Enze,LIU Guoyong,PANG Xiongqi,LI Changrong,WU Zhuoya

Fig. 7. Diagenetic features of the Shahejie Formation reservoir in the Nanpu sag. (a) Grain stylolite contact (Well G23X8, 4 259.00 m); (b) Grain point contact, grain line contact, grain concave-convex contact (Well PG2, 4 252.09 m); (c) Quartz overgrowth (Well NP306X3, 4 981.26 m); (d) Quartz overgrowth (Well G66X3, 4 074.67 m); (e) Calcite cement (Well G66X3, 4 074.20 m); (f) Fe-calcite cement (Well PG2, 4 251.44 m); (g) Feldspar dissolution (Well PG2, 4 254.95 m); (h) Feldspar dissolution (Well GJ3102-8, 3 490.76 m); (i) Rock fragment dissolution (Well GJ3102-8, 3 492.50 m).