Formation Evaluation & Geomechanic Concept Wellbore Stability
To provide participants with an integrated understanding of formation evaluation fundamentals, rock and fluid properties, and geomechanical concepts required to assess and maintain wellbore stability. Participants will learn how to interpret logs, evaluate reservoir quality, construct geomechanics models, and apply wellbore stability analysis to real drilling and production scenarios.
Designed for,
- Petrophysicists needing stronger integration with geomechanics
- Drilling Engineers who must understand formation behavior and stress impacts on wellbore stability.
- Reservoir Engineers working with rock property models and formation integrity.
- Geologists / Geoscientists involved in reservoir characterization and structural interpretation.
- Completion Engineers dealing with sand control and mechanical integrity.
Young Professionals or Fresh Engineers in petroleum disciplines aiming to learn fundamentals of formation evaluation & geomechanics.
A. Geology Course/Petroleum Geology
3 days
Skilled
Classroom
DAY 1 – Fundamentals of Formation Evaluation
Session 1: Introduction to Formation Evaluation
- Basic principles & workflow
- Wireline vs LWD data
- Reservoir properties overview (porosity, permeability, saturation)
- Quick-look interpretation
Session 2: Reservoir Rock & Fluid Properties
- Lithology identification
- Electrical properties (Archie, Waxman-Smits)
- Fluid typing (oil, gas, water)
- Rock typing and flow units concept
Session 3: Key Well Logs for Formation Evaluation
- Gamma Ray (GR)
- Resistivity logs
- Density-Neutron Porosity
- Sonic log
- NMR (optional advanced topic)
Hands-On Exercise
- Basic log interpretation
- Quick-look QC on log curves
DAY 2 – Geomechanics Fundamentals
Session 1: Introduction to Geomechanics
- What is geomechanics & why it matters
- In-situ stress components
- Effective stress concept
- Pore pressure fundamentals
Session 2: Rock Mechanical Properties
- Static vs dynamic elastic moduli
- Young’s Modulus, Poisson’s Ratio
- UCS (Unconfined Compressive Strength)
- Tensile strength estimation
- Deriving mechanical properties
Session 3: Building a 1D Geomechanical Model (1D MEM)
- Input data requirements (logs, tests, seismic)
- Pore pressure prediction methods
- Overburden stress calculation
- Mechanical properties calibration
- Stress profile generation
Hands-On Exercise
- Build a simple 1D geomechanics model from provided log data
DAY 3 – Wellbore Stability Concepts
Session 1: Wellbore Failure Mechanisms
- Shear failure (breakouts)
- Tensile failure (fractures)
- Hole cleaning vs mechanical failure
- Influence of mud weight & drilling practices
Session 2: Wellbore Stability Analysis
- Mohr-Coulomb failure criterion
- Shear & tensile failure envelopes
- Stress transformation around wellbore
- Safe Mud Weight Window calculation
- Influence of well trajectory & inclination
Session 3: Logs & Data for Wellbore Stability
- Caliper log interpretation
- Dipole sonic
- Image logs (FMI, UBI) for breakout/fracture identification
- Using drilling parameters (ROP, torque, ECD)
Hands-On Exercise
- Mud weight window calculation
- Identifying breakouts using image log samples
DAY 4 – Integration: Formation Evaluation + Geomechanics + Operations
Session 1: Integrating Formation Evaluation with Geomechanics
- Linking porosity, lithology, UCS, and stress
- SHF & saturation impact on rock strength
- Petrophysical indicators of weak formations
Session 2: Operational Applications
- Casing design considerations
- Sand production prediction (Geomechanics-based)
- Fracturing & completion geomechanics basics
- Drilling through depleted formations
- Narrow window drilling strategy
Session 3: Case Studies
- Wellbore instability during drilling
- Deepwater geomechanics challenges
- Carbonate vs clastic stability behavior
- Real-field case: shale instability modeling
Final Hands-On Exercise
- Full workflow:
– Interpret logs →
– Build 1D MEM →
– Perform wellbore stability analysis →
– Recommend mud weight & operational plan
Our Trainer is a Senior Wellsite Geologist Consultant with extensive experience in onshore and offshore drilling projects for approximately 28 years, covering well appraisal, delineation, and development. This Geological/Geophysics graduate of UPN Veteran Yogyakarta has in-depth expertise in electric log interpretation, petrophysical evaluation, wellsite supervision (LWD/MWD, mudlogging, wireline & coring), and well prognosis preparation up to End of Well Report. Experienced in various types of reservoirs—both clastics and carbonates—in a number of large basins in Indonesia and the region, he is also active in coaching and mentoring activities related to wellsite geology and petrophysical analysis.
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