Progressive Alterations of Shale Properties under Staged Long-Term CO2 Exposure: Insights from a Multicycle Experimental Study

Abstract

AbstractThe long-term integrity of shale formations upon exposure to CO2 is paramount for carbon geologic sequestration and enhanced hydrocarbon recovery. However, predicting the property alterations of shale remains challenging due to the complex and ...Practical ApplicationsThis study provides critical insights into the long-term evolution of shale properties under repeated CO2 exposure. The observed cyclical fluctuations in mineral content and the nonlinear alterations in pore and fracture networks ...