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. 8. Types of clay minerals in Shahejie Formation reservoirs, the Nanpu sag. (a) Microlitic quartz and Illite (Well PG2, 4 248.98 m); (b) Mixed-layer illite/smectite (Well PG2, 4 251.21 m); (c) Illite (Well PG2, 4 251.78 m); (d) Chlorite (Well NP306X1, 4 240.21 m); (e) Kaolinite (Well NP306X6, 4 413.56 m); (f) Chlorite (Well G66X3, 4 074.20 m); (g) Kaolinite (Well G8X1, 3 813.15 m); (h) Mixed-layer illite/smectite (Well G8X1, 3 813.85 m); (i) Illite (Well G8X1, 3 827.15 m). I—Illite; I/S—Mixed-layer illite/smectite; Ch—Chlorite; K—Kaolinite; MQ—Microlitic quartz; F—Feldspar.