Sentence examples for minimum effective stress from inspiring English sources

Open image in new window Fig. 5 Map view of minimum effective stress distribution around Big Lake fault due to the effect of the present stress magnitudes and orientation for a Patchawarra formation, b Toolachee formation.

Open image in new window Fig. 6 Map view of minimum effective stress distribution around Big Lake fault due to the effect of the paleo-stress magnitudes and orientation for a Patchawarra Formation, b Toolachee Formation using FEM.

Open image in new window Fig. 8 Map view of minimum effective stress distribution around Big Lake fault due to the effect of the paleo-stress magnitudes and orientation using BEM.

Hanging wall closure is most often sealing and, therefore, retains significant columns of hydrocarbon, often leading to high minimum effective stress and fluid charging.

σ1′ = maximum effective stress, σ3′ = minimum effective stress, σ′ = normal stress, φ = friction angle, C = cohesion, τ = shear stress, α = fracture angle.

Fracture initiates when the minimum effective stress (i.e., the total stresses minus the formation pore pressure) at the wellbore wall reaches or exceeds formation rock tensile strength, T (Fjaer et al. 2008).

According to frictional equilibrium, one can assume that the ratio between maximum and minimum effective stresses cannot exceed the one required to cause slip on pre-existing faults that are optimally oriented to the principal stress field (Jaeger et al. [2007]; Moos and Zoback [1990]).

For instance, a reduction in fluid pressure within a reservoir is often accompanied by a slower increase in the minimum effective horizontal stress with respect to the vertical effective stress change (e.g., Segura et al. 2011).

Fracture initiation occurs when the minimum effective tangential stress on the wellbore wall reaches the tensile strength of the rock.

Beyond this threshold effective stress effects dominate.

The objective was to produce a part with minimum thickness variation while keeping the maximum effective stress below the material ultimate stress during the forming process.