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. 6. Pore types of Shahejie Formation reservoirs in the Nanpu sag. (a) Primary pore, secondary intragranular dissolution pores (Well G94-4, 3 671.09 m); (b) Secondary intergranular dissolution pore (Well GJ3102-8, 3 499.95 m); (c) Secondary intergranular dissolution pore (Well G66X3, 4077.50 m); (d) Primary pore, secondary intergranular dissolution pore, secondary intragranular dissolution pores and microfractures (Well PG2, 4252.50 m); (e) Secondary intergranular dissolution pore (Well PG2, 4 251.90 m); (f) Microfractures (Well NP306X3, 4 987.51 m); (g) Primary pore (Well G66X3, 4 074.89 m); (h) Intergranular dissolution pore and primary pore (Well PG2, 4 251.90 m); (i) Intragranular dissolution pores (Well G8X1, 3 830.98 m).