Characterization of the in-situ stress on the Horda platform – A study from the Northern Lights Eos well

Impact of the lower Jurassic Dunlin Group depositional elements on the Aurora CO2 storage site, EL001, northern North Sea, Norway

“…Pressure measurements in the well strongly support the suitability of the Drake Formation as cap rock (Meneguolo et al, 2020). Additional characterization of the unit included rock mechanical testing and mineralogical composition and further confirmed that the Drake Formation would act as a robust top seal for the injection targets (Thompson et al, 2022(Thompson et al, , 2021Meneguolo et al, 2021).…”

Uncertainty of Stress Path in Fault Stability Assessment During Co2 Injection: Comparing Smeaheia 3d Geomechanics Model with Analytical Approaches

“…In the model, effective unit weights are assumed to be 10.235 kPa/m, and the initial pore pressure is assumed to follow a hydrostatic pore pressure, although the recent well drilled in the Gamma closure confirmed depletion on the Smeaheia fault block (L. . A fixed value of in-situ effective stress ratio K 0 = σ h '/σ v ' = 0.45 is applied for all lithologies, although K 0 may vary between 0.4-0.8 for various lithologies as observed from field stress data (Andrews et al, 2016;Andrews and de Lesquen, 2019;Thompson et al, 2022). Thompson et al (2022) reported that the study area has some degree of horizontal stress anisotropy (σ H /σ h = 1.01 -1.27), and the primary orientation of the maximum horizontal stress is the E-W direction.…”

“…A fixed value of in-situ effective stress ratio K 0 = σ h '/σ v ' = 0.45 is applied for all lithologies, although K 0 may vary between 0.4-0.8 for various lithologies as observed from field stress data (Andrews et al, 2016;Andrews and de Lesquen, 2019;Thompson et al, 2022). Thompson et al (2022) reported that the study area has some degree of horizontal stress anisotropy (σ H /σ h = 1.01 -1.27), and the primary orientation of the maximum horizontal stress is the E-W direction. This study assumes an isotropic horizontal stress condition as the initial horizontal anisotropy condition but investigates the development of injection-induced horizontal stress anisotropy.…”

“…The θ is the fault dip angle. It is noted that our study area Smeaheia is expected to have a normal faulting regime and close to isotropic horizontal stresses (Andrews et al, 2016;Thompson et al, 2022). However, in order to consider the injection-induced horizontal stress anisotropy, this study uses full 3D stress decomposition.…”

3D Field-Scale Geomechanical Modeling of Potential CO2 Storage Site Smeaheia, Offshore Norway

“…A normal faulting stress regime was assigned to the study area. [34][35][36][37]. The minimum horizontal stress gradient used was 0.1245 MPa/m, which was estimated from the X-LOT database from the study area [24].…”