OG90
Course Contents
Module 1: Integrated Petrophysics and Geomechanics Framework
Key Topics
- Role of petrophysical interpretation and geomechanics in high-impact reservoir decisions
- Linking reservoir rock properties with subsurface mechanical behaviour
- Overview of data sources: logs, core, pressure, image logs and production tests
- Managing uncertainty, scale discrepancies and data quality in integrated workflows
- Core technical challenges in clastic, carbonate and naturally fractured reservoirs
- Key deliverables and risk matrices for subsurface asset and well planning teams
- Step-by-step integration workflow: from initial evaluation to final field application
Module 2: Petrophysical Evaluation and Rock Typing
Key Topics
- Lithology determination, shale volume ($V_{sh}$) and mineral volume interpretation
- Advanced porosity models derived from density, neutron, sonic and NMR logs
- Water saturation ($S_w$) models and evaluating key input uncertainties
- Permeability estimation methodologies from core analysis, logs and hydraulic flow units
- Core-log calibration, core plugging strategies and depth matching principles
- Depositional facies, electrofacies classification and petrophysical rock typing
- Establishing net reservoir, net pay and overall reservoir quality criteria
Module 3: Geomechanical Properties and Stress Modelling
Key Topics
- Extracting elastic properties (Poisson’s ratio, Young’s modulus) from sonic logs and core
- Static versus dynamic rock properties: understanding the discrepancy and calibration techniques
- Rock strength determination, failure criteria (Mohr-Coulomb) and mechanical facies
- Quantifying overburden stress, pore pressure regimes and the effective stress principle
- Estimating minimum ($S_{hmin}$) and maximum ($S_{Hmax}$) horizontal stress magnitudes
- Borehole image logs: identifying breakouts and drilling-induced tensile fractures
- Constructing, QCing and validating a robust 1D Mechanical Earth Model (MEM)
Module 4: Wellbore Stability, Sanding and Fracture Risk
Key Topics
- Core wellbore stability concepts and calculating the safe mud weight window
- Mitigating shear failure, tensile failure, hole collapse and lost circulation risks
- Real-time indicators: interpreting borehole breakout, tight hole and pack-off signals
- Reservoir depletion, reservoir compaction and associated stress-path effects
- Sand production mechanisms, critical drawdown pressures and sanding risk screening
- Characterising natural fractures, assessing fault reactivation risks and top-seal integrity
- Completion and stimulation implications: translating stress models into design choices
Module 5: Reservoir Applications and Integrated Case Review
Key Topics
- Embedding petrophysical evaluation and geomechanical constraints into static 3D models
- Upscaling methodologies for rock types, flow units and anisotropic mechanical properties
- Well placement optimization, multilateral designs and trajectory planning using stress data
- Managing injection-induced cooling, asset depletion and pressure-management scenarios
- Providing critical geomechanical inputs to hydraulic fracture containment planning
- Effectively communicating subsurface uncertainty, engineering assumptions and technical risks
- Integrated capstone case study, workflow execution and practical action planning