Sequence Stratigraphy Variation and Its Implication in Shale Oil Exploration: A Case Study of the Eocene Dongying Depression, Eastern China

Figure 8

Characteristics of intercrystalline pores in the Es4u shale in the Dongying Depression. (a) Recrystallized intercrystalline pores. During the recrystallization process of calcite, the crystal volume becomes smaller, thus forming recrystallized intercrystalline pores. (-), 3397.5 m. (b) Recrystallized intercrystalline pores. The pore size is about 10 μm, and some of the pores are filled with oil. (+), 3397.5 m.

(a)

(b)