MEM and Wellbore modelling

Title

Analysis Type - Features List / Utility

Model

Workflow for Material Earth Models (MEMs)

MEM_001 MEM Workflow

Mechanical (3D) / Coupled HM (3D)

•Case 1 Base Case

•Various geostatic initialization phases (gravity, tectonic, contact release, constitutive release)

•Production simulation

•Mechanical contact

•Initial spatial grid data and spatial boundary

•Case 1b Reservoir Poro-elasticity defined via Spatial_table

•Young's modulus - porosity dependent spatial table

•Case 2 Implicit Initialisation

•Geostatic initialization stages (gravity and tectonic) via implicit solver

•Restart data

•Case 3a HM Coupled (High Perm Fault)

•Case 3b HM Coupled (Low Perm Fault)

•Coupled HM simulation

•Water level

•Well element for producer well

•High/Low perm contact fluid flow

•Initial spatial grid data and spatial boundary

•Case 4 HM Coupled Producer and Injector Wells

•As Case 3a

•Well element for producer and injector wells

•Case 4b HM Coupled with De-activated Porous Flow Groups

•As Case 4

•De-activation of porous flow groups

•Case 4c & 04d Implicit-Implicit HM Modelling  

•As Case 4 and Case04b respectively

•Full implicit solver utilized for coupled hydro-mechanical solution

•Node-node contact algorithm

•Case 5 Mapping of Results to Spatial Surface and Output to Plot File

•Read results plot file and output to new plot file

•Mapping of results to imported Spatial surface definition

•Case 6 Reservoir with Fractures

oCase06a - Ubiquitous fractures with homogeneous properties with fracture spacing of 5m

oCase06b - Two corridors of fractures with spatial definition of fracture spacing ranging from 25m to 75m

•Inclusion of embedded fractures in the reservoir and their influence on pore pressure distribution and flow

MEM_002 Wokflow for cases including salt formations

Mechanical (3D)

•Case00 Scaling Salt Viscosity

•Case01 Base Case

•Salt layers modelled via Herschel-Bulkley viscoplastic material

•Various time unit updates via salt material constant K

•Case 2 Faulted Case (Not available yet)

•Faulted model with contact

MEM_003 Boundary Optimisation and Super Element approach within the MEM Workflow

Mechanical (3D) using ParaGeoInv

•Case 1 Boundary optimisation

•Case 2 Boundary optimisation using the Super Element approach (Currently unavailable)

•Inverse analysis for initialisation stages using ParaGeoInv

•Usage of Super element

Implicit Solver

Imp_001 Usage of the implicit solver

Mechanical (3D)

•Case 1 Base Case

•Implicit solver

Super Element (Currently unavailable)

SuEl_001 Super Element Workflow

Mechanical (3D)

•Case 1 Workflow Example

oStep 1 Create the Super Element

oStep 2 Use the Super Element

oStep 2b Use an Reflate the Super Element

•Case 2 Usage of Coupled Freedoms

•Super element workflow

•Implicit solver

•Coupled freedoms

Wellbore Models

Wellbore_001 Cased and Cemented 3D Wellbore Model

Coupled THM (3D)

•Case01 Time-dependent Cement Hardening with Diagenetic Shrinkage

•Coupled THM simulation

•Deactivated porous flow in casing and cement

•Contact between wellbore components

•Time-dependent cement hardening material with increased yield strength

•Cement hardening with diagenetic reaction resulting in volume shrinkage

•Usage of transient time step growth in solution control

Wellbore_002 Casing Collapse due to Shear at Salt/Sandstone Bedding Plane

Mechanical (3D)

•Contact between salt/sandstone bedding plane

•Large bedding plane slip (shear) causing casing collapse

•Salt with Herschel-Bulkley viscoplastic material