... Finite Element Model focused on critical faults. Beyond a summary of the theoretical framework of the fault reactivation process, the paper will highlight the assumptions and the computation workflow of the developed tool, as well as the output data resulting from the analysis. INTRODUCTION...

... fracturing/fault reactivation in the chalk and/or the overlaying shale deposits. To address convergence issues in non-isothermal flow modeling, we assume that the density and viscosity of CO 2 remain constant with temperature change in the coupled simulation. Our results demonstrate that, with constant rate...

... critically stressed distant faults-, than incorporating a more realistic elastoplastic model for the reservoir rock. Second, injection (without production) of a cold fluid may result in quick distant fault reactivation because the pressure front travels much faster than the temperature front, in the range...

... ABSTRACT The injection of fluids in geothermal energy, as well as in CCS, is accompanied by changes in stresses due to the reduced temperatures and elevated pressures. This can result in unwanted hydraulic fracturing and fault reactivation. We have developed a fast, semi-analytic tool...

... ABSTRACT The Coulomb failure stress (CFS) criterion based on the Mohr-Coulomb friction theory is commonly used to explain physical mechanisms governing injection-induced seismicity. While the CFS criterion can evaluate the onset of fault reactivation caused by fluid perturbations, it cannot...

... in the shallow reservoir and basement in the case that the reservoir has a lower poroelastic stress coefficient (η = 0.25). Injection in the reservoir with a higher poroelastic stress coefficient (η = 0.39) results in a more fault reactivation tendency in the shallow basement. When α = 1, i.e., incompressible...

... carbon dioxide injection deep underground including investigation on fault reactivation and potential leakage. We first test the flow simulator, matching the numerical solution with a pre-existing solution for density, viscosity, and mass fraction of dissolved carbon dioxide and water in aqueous...

..., it is demonstrated that these losses can be consistently linked to downhole pressures exceeding the predicted fault reactivation pressures and loss rate can be associated with the lithology of the damage zone. These observations provide multiple examples on how recognizing the lost circulation mechanism associated...

.... A numerical analysis by a 3D FE-IE elasto-plastic geomechanical simulator has been carried out to cast light in this respect, by investigating the mechanisms and the critical factors that can be responsible for a fault reactivation during the various stages of UGS in reservoirs located in the Rotliegend...

.... Furthermore, higher injection pressure seems to enhance fault transmissibility, probably due to additional micro-fracturing. fault reactivation injection pressure Earthquake experiment Reservoir Characterization acoustic emission shear displacement giwelli fracture network transmissibility...

... ABSTRACT: Poroelastic stress changes in response to production can result in fault reactivation. The combined effects of production and injection on fault reactivation, especially for unconventional reservoirs where injection occurs in layers other than the produced interval, are not readily...

... by poroelasticity, thermoelasticity and fracture compression are investigated. With Mohr-Coulomb failure criterion, we calculate the fault reactivation potential around the fracture. Then, two case studies of constant water injection into a hydraulic fracture are presented. This work is of interest...

... to analyze the relation between changes in reservoir pore pressures and fault stress changes. We address the effects of fault strength, reservoir and fault geometry and the presence of a viscoelastic caprock on the timing of fault reactivation, the nucleation of seismic events and the main characteristics...

... ABSTRACT: Variations of internal pressure within reservoirs structurally compartmentalized by sealing faults induce changes in deformations and stresses. If these changes are significant, they can create favorable conditions for fault reactivation by shear or tensile modes. In that scenario...

... mechanisms that cause fault reactivation are unclear. This study reports a systematic analysis of several felt induced seismicity field observations using geomechanical models to understand the mechanisms that cause the fault reactivation. The field observations indicate that felt induced seismicity occurs...

... ABSTRACT: The potential of inducing fault reactivation by a synthetic nuclear waste repository in a clay-stone formation is here investigated. The target clay formation may be expected to be almost impermeable, having self-healing and long-term plastic properties, to make sure the canisters...

... ABSTRACT: Fault reactivation in response to fluid injection into the subsurface is controlled by a number of site-specific and operational parameters. We investigate the effects of variable fluid injection rate on the stability of a nearby fault using three-dimensional fully coupled...

... Oil & Gas fault reactivation reference scenario shear stress slip displacement seismic event stress drop friction coefficient fault slip length seismicity reservoir Scenario displacement fault slip displacement reactivation nucleation length reservoir rock ARMA 16-658 Modelling...

... geomechanics geometry geology upstream oil & gas permeability injection rate uplift fault reactivation geomechanical model pore pressure change co 2 rock property perth basin reservoir characterization energy conservation reactivation potential subsurface uncertainty injection ARMA 15...

... Abstract Fault reactivation under a given injection pressure is estimated for faults surrounding a well designed for the purpose of drilling cuttings reinjection in offshore West Africa. The poroelasto-plastic finite-element method (FEM) is used to calculate a set of scenarios of injection...