A multiscale hydro‐geochemical‐mechanical approach to analyze faulted CO2 reservoirs

摘要: This paper applies a multiscale hydro-geochemical-mechanical approach to analyze faulted CO2 reservoirs using the STOMP-CO2-R code that is coupled ABAQUS® finite element package. models reactive transport of causing mineral composition changes are captured by an Eshelby-Mori-Tanka model implemented in ABAQUS®. A three-dimensional (3D) for reservoir containing inclined fault was built formation reaction network with five minerals: albite, anorthite, calcite, kaolinite, and quartz. 3D mesh exactly maps grid developed analyses. The contains alternating sandstone shale layers. impact on geomechanical properties rocks studied terms affect their responses. Simulations assuming extensional compressional stress regimes without geochemistry performed study regime effect risk hydraulic fracture. slip examined as functions regime, geomechanical, geochemical-mechanical effects, inclination, position. results show mineralogical due injection reduce permeability elastic modulus reservoir, leading increased fluid pressure fracture location caprock seal. Shear failure reactivation not predicted occur. However, position light analysis have important tendency factor slip. © 2016 Society Chemical Industry John Wiley & Sons, Ltd.