Applied Open Hole Log Analysis
Interpretation
&
Reservoir Evaluation

Duration: 5 Days
Target Audience: Petrophysicists, Geologists, Reservoir Engineers, Log Analysts, Exploration & Production Professionals
Delivery Mode: Classroom / Virtual with Hands-On Exercises, Case Studies, and Log Interpretation Software Demos
Level: Intermediate to Advanced

Course Overview

This course equips participants with the skills to interpret open hole logs for formation evaluation, reservoir characterization, and hydrocarbon estimation. It covers the principles of logging tools, qualitative and quantitative log interpretation, crossplots, net pay calculations, and advanced analysis techniques.

Day-by-Day Outline

Day 1 – Principles of Open Hole Logging

- Logging objectives and acquisition environment
- Fundamentals of resistivity, porosity, density, neutron, sonic, and gamma-ray logs
- Borehole conditions and logging tool responses
- Logging suite selection for different lithologies
- Exercise: Identify logging tools and their measurements in real well examples

Day 2 – Lithology & Shale Volume Interpretation

- Lithology identification using GR, density-neutron, and crossplots
- Shale volume estimation methods: gamma-ray, crossplot, and combined techniques
- Effect of clay types on log responses
- Workshop: Perform lithology analysis on log data from a clastic reservoir

Day 3 – Porosity & Water Saturation Calculations

- Porosity from density, neutron, and sonic logs
- Archie’s equation and saturation exponent determination
- Calculation of formation water resistivity (Rw)
- Tools for saturation height functions
- Exercise: Calculate porosity and water saturation on multiple well logs

Day 4 – Net Pay, Cut-offs & Advanced Analysis

- Cut-off selection for porosity, water saturation, and shale volume
- Net pay vs. net reservoir concepts
- Interpretation of complex lithologies and laminated sands
- Overview of NMR and advanced resistivity tools
- Workshop: Calculate net pay for a reservoir section using log data

Day 5 – Integration & Case Studies

- Integrating core and log data for calibration
- Cross-discipline integration with seismic and production data
- Case studies of log interpretation in carbonates, tight reservoirs, and unconventionals
- Limitations and uncertainties in log analysis
- Capstone Project: Complete a full log interpretation workflow and present findings

Expected Learning Outcomes

Understand open hole logging principles and tool responses
Identify lithology and calculate shale volume from logs
Determine porosity and water saturation with industry-standard methods
Calculate net pay and evaluate reservoir potential
Integrate log data with core and other subsurface data for comprehensive reservoir characterization

Customizable Add-ons
Tailored content for local geology (e.g. Nile Delta, Western Desert)
Lab visit or simulation hands-on demo
Integration with economics or production courses

Special Customization for Regional NOCs

- Includes legal and fiscal case examples from MENA (Egypt, Libya, Iraq, Algeria)
- Arabic-English bilingual delivery available
- Tailored licensing round simulation exercises
- Optional site visits to local oilfields or regulatory agencies

Trainer Profile

- Senior reservoir and exploration engineers from IOCs and NOCs
- Former advisors to government ministries
- Experts in petroleum contracts and economic modeling

Certification

Participants will receive a Certificate of Completion and a performance report including assessment outcomes and instructor feedback.