Characterizing the Geochemistry of the CO_2-Fluid-Shale Interface using In-Situ Infrared Spectroscopy and Feature Relocation Scanning Electron Microscopy

摘要

1. CO_2 sorption occurs in:rn1.1 Micro-porosity of the organic fractionrn1.2 Surfaces and internal layers of clay mineralsrn2. Carbonate Reactionsrn2.1 Exposure to CO_2 initiates carbonate precipitation and dissolution until equilibrium is reachedrn2.2 Possible buffering due to pH changesrn3. Surface Effectsrn3.1 Dry CO_2 exposurern3.1.1 Etching, pitting, and minor precipitationrn3.2 Wet CO_2 exposurern3.2.1 Heavy etching and pitting.