Stress- and Chemistry-Mediated Permeability Enhancement/Degradation in Stimulated Critically-Stressed Fractures

[摘要] This work has investigated the interactions between stress and chemistry in controlling the evolution of permeability in stimulated fractured reservoirs through an integrated program of experimentation and modeling. Flow-through experiments on natural and artificial fractures in Coso diorite have examined the evolution of permeability under paths of mean and deviatoric stresses, including the role of dissolution and precipitation. Models accommodating these behaviors have examined the importance of incorporating the complex couplings between stress and chemistry in examining the evolution of permeability in EGS reservoirs. This document reports the findings of experiment [1,2] and analysis [3,4], in four sequential chapters.

[发布日期] 2009-03-30

[学科分类] 再生能源与代替技术

[关键词] CHEMISTRY;DIORITES;DISSOLUTION;FRACTURED RESERVOIRS;FRACTURES;PERMEABILITY;PRECIPITATION;SIMULATION;STRESSES Permeability;Enhanced Geothermal Systems;Critical Stress;Coupled Processes;THMC;Precipitation;Dissolution;Reaction;Chemistry;Dilation;Closure;Modeling