Numerical Simulation of Wellbore Stability in Hydrated Shale (FDEM / COMSOL)

Title:
Numerical Simulation of Wellbore Stability in Hydrated Shale (FDEM / COMSOL)

Description:
We need a geomechanics or numerical modeling expert to build a 3D coupled Hydro–Mechanical–Thermal–Chemical (HMTC) model for hydrated shale or mudstone wellbore stability.
The model should simulate stress redistribution and concentration after wellbore excavation, fluid–solid coupling with seepage and hydration swelling or degradation, and fracture initiation, propagation, and block detachment or collapse (shear and tensile failures).
The model must allow changing wellbore diameter and formation dip angle for comparative studies.

Deliverables:

A complete and runnable 3D HMTC model (1 set), including geometry, mesh, material parameters, boundary conditions, coupling setup, and solver configuration.

Simulation results for different wellbore diameters, formation dips, and lithological conditions, including stress, strain, pore pressure, fracture development, creep, and collapse phenomena.

Visualized outputs (figures or animations) showing stress–strain–pore pressure evolution, fracture propagation, and collapse processes.

A concise technical report summarizing modeling assumptions, parameters, boundary conditions, and key findings.

Preferred Tools:
Preferred – FDEM (Finite–Discrete Element Method)
Alternative – COMSOL Multiphysics or other multiphysics tools capable of similar coupling and fracture simulation.

Required Skills:
Finite Element Analysis (FEA)
Geomechanics / Rock Mechanics
Hydro–Mechanical Coupling Simulation
Stress–Strain and Fracture Analysis
Creep and Time-Dependent Deformation Modeling
COMSOL Multiphysics or FDEM Modeling
3D Simulation and Visualization
Technical Reporting

Nice to Have:
Experience with shale hydration or degradation modeling
Experience with FLAC3D, UDEC, ANSYS, or Abaqus
Python or MATLAB for data post-processing

Screening Questions:

Please describe your experience with wellbore stability or geomechanics modeling.

Which tool will you use (FDEM or COMSOL)?

How long will it take you to complete this task and what is your estimated cost?

What input data do you need from us to start?

• Complete 3D HMTC model with geometry, mesh, and parameters
• Simulation results for different wellbore diameters and formation dips
• Visualized outputs of stress-strain-pore pressure evolution
• Technical report summarizing modeling assumptions and findings
• Task requirements.dox: Please refer to the Chinese description as the primary source.
• Kindly review the file content carefully.
• If you are capable of completing this task, please let me know how long it will take and how much you would charge for it.