[EPIC] Model Initialization with Faults

Description

Keep track of all developments related to model initialization with Faults

Work Scope

• Provide different options for poromechanical model initialization
• Prepare documents for available options
• Add meaningful examples and include them into integratedTests

Issues in this EPIC

1. Initialization of simple problem involving mechanics through an initialization step

• Documents for gravity induced hydrostatic initialization (current default option)
  https://github.com/GEOS-DEV/GEOS/pull/3249

• Documents for user specified in-situ stress/pore pressure in every cell (do not update pore pressure)
  https://github.com/GEOS-DEV/GEOS/pull/3249

• Material state being set by initial step, add full material state output and endures to next step, and displacements are set to zero

2. Initialization of simple problem from

• Prescription of user specified pore pressure
• Application of boundary conditions (e.g. constant displacement gradient to account for tectonic strain)
• Targeting in-situ stress for subset of model (e.g. stress curves along wellbore)
• Change material properties

3. Add faults to 1) and 2)

• Impose high cohesion and release
• Allow slip from beginning
• Augmented Lagrange influences the approach

4. Translate/rotate coordinate system

• Normal/tangential coordinate frame from boundary conditions
• Arbitrary coordinate frame for boundary conditions
• Arbitrary coordinate frame for any field specification (define normal/tangential for layer)