Carbon dioxide injection and associated hydraulic fracturing of reservoir formations

摘要: The storage potential of subsurface geological systems makes them viable candidates for long-term disposal significant quantities CO2. geo-mechanical responses these as a result injection processes well the protracted CO2 are aspects that require sufficient understanding. A hypothetical model has been developed conceptualises typical well-reservoir system comprising an where fluid (CO2) is introduced and production/abandoned sited at distant location. This was accomplished by adopting numerical methodology (discrete element method), specifically designed to investigate phenomena whereby various monitored inter-particle scale. Fracturing events were simulated. In addition, influence certain operating variables such flow rate pressure studied with particular interest in nature occurring fractures trend propagation, pattern magnitude build-up vicinity, distribution between regions pore velocity regions. Modelling results generally show initiation fracturing caused tensile failure rock material region injection; however, shear becomes more dominant later stage injection. Furthermore, isolated observed occur wells not propagated from point. highlights through well, which could be used enhance oil/gas recovery production well. fracture development directly influenced rate. Likewise, greatly affected distance point DEM modelling technique illustrated provides effective procedure allows specific investigations mechanisms systems. application this facilitates understanding phenomenon factors governing process.