Nano-scale texture and porosity of organic matter and clay minerals in organic-rich mudrocks

Pore size distribution of samples showing significant pore volume decrease below 5 nm pore size upon organic matter removal by NaOCl treatment. Blue circles represents the natural aliquot while the red triangles are the organic removed aliquot. I+S = illite + smectite clay group in wt.%; TOC = Total Organic Carbon in wt.%; Eff. = organic matter removal efficiency in %; HI = Hydrogen Index in mg HC/g TOC.