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: 1.1 Micro-porosity of the organic fraction 1.2 Surfaces and internal layers of clay minerals 2. Carbonate Reactions 2.1 Exposure to CO_2 initiates carbonate precipitation and dissolution until equilibrium is reached 2.2 Possible buffering due to pH changes 3. Surface Effects 3.1 Dry CO_2 exposure 3.1.1 Etching, pitting, and minor precipitation 3.2 Wet CO_2 exposure 3.2.1 Heavy etching and pitting.