Multiple Planes of Weakness

Bedding formations

Consider stratigraphy - Check this option to use the existing stratigraphy, as defined by the marker set, as the basis of the bedding planes definition. JewelSuite Geomechanics includes bedding plane anisotropy in its calculations if bedding plane information is provided. To populate the table, click the Use default records button. Optionally, you can define different intervals with families of fractures formations yourself, by selecting a top and base from the respective drop-down lists in the table.

Use isotropic mode for non-seleceted formations - Check this option to combine bedding planes with isotropic mode if a formation is not selected and defined in the Bedding Parameters table.

Bedding Parameters

Bedding planes represent planes of weakness, which allow the borehole wall to fail where the shear stress on bedding exceeds the Mohr-Coulomb limit and causes slip on the bedding plane. The Mohr-Coulomb limit is a function of the stress orientations, bedding orientation, cohesion, and sliding friction coefficient. You can manually define the settings for Bedding Dip, Bedding Dip Azimuth, Bedding Cohesion, Sliding Friction Coefficient and Spacing per fracture set, or you can copy and paste this information into the table. Spacing is defined as fracture spacing relative to borehole diameter.