Fig. 16 | Scientific Reports

Fig. 16

From: Impact of micromechanical properties of organic matter on the micro-mesopore structures of the over-mature shale in the Niutitang Formation

Fig. 16

Schematic of shale matrix pore evolution. (a) over-mature-deep, high-temperature stage (2.0% < RO < 2.5%), the number of organic pores increased a lot; (b) over-mature-deep, high-temperature stage later, the number of organic pores began to gradually decrease(2.5% < RO < 3.0%); (c)over-mature-metamorphic stage (3.0% < RO < 3.5%), the number of OM pores decreased rapidly, and the shape became irregular; (d) metamorphic stage (RO > 3.5%) due to OM is getting hard, which led to the OM pores gradually disappeared.

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