A study of stress change and fault slip in producing gas reservoirs overlain by elastic and viscoelastic caprocks

Geomechanical simulations were conducted to study the effects of reservoir depletion on the stability of internal and boundary faults in gas reservoirs overlain by elastic and viscoelastic salt caprocks. The numerical models were of a disk-shaped gas reservoir with idealized geometry; they mimic the structure of a gas field in the northern...

GHGT-10: Assessing the integrity of fault- and top seals at CO2 storage sites

Induced stress changes due to CO2 injection into geological reservoirs can mechanically damage bounding fault- and top seals creating preferential pathways for CO2 migration from the containment or trigger existing faults causing seismic activity at storage sites. In this paper we present geomechanical simulations of the poro-mechanical effects,...

Assessing the short-term and long-term integrity of top seals in feasibility studies of geological CO2 storage

The geomechanical effects of past hydrocarbon production and subsequent CO2 injection in depleted gas reservoirs were evaluated as a part of several recently accomplished feasibility studies of CO2 storage in the Netherlands. The objectives of geomechanical studies were to assess the mechanical integrity of a reservoir-seal system, i.e. the...

Site-specific geomechanical modeling for predicting stress changes around depleted gas reservoirs considered for CO2 storage in the Netherlands

Geomechanical simulations were conducted on a number of site-specific numerical models of depleted gas fields considered for CO2 storage in the Netherlands. Simulations were aimed at assessing the maximum areal extent of stress perturbation around depleted reservoirs at the end of depletion period. Simulation results indicate that the extent of...