Formation and Development of Pore Structure in Transitional ShaleInsights from Thermal Simulation Experiments on the Shanxi Formation Shale in the Ordos Basin.

Mesopore volume first displays a decreasing trend and subsequently an increasing trend with the TOC conversion rate ( Figure ), because extractable OM initially fills mesopores and reduces mesopore volume, and subsequently, extractable OM cracks into hydrocarbon gas, leading to the combination of micropores into mesopores.

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