Events & Courses

Part 1: Introduction, physical measurement principles and structural interpretation of dipmeters and borehole image logs - 5 December 2023

1. Introduction

• History of dipmeter logging
• Surface resistivity measurements
• Evolution of dipmeter technology to borehole image logging
• Inclinometry/navigation systems
• Interval/manual correlation methods for dip computation
• Basic dipmeter interpretation rules

2. Physical measurement principle of commonly used electrical borehole image logs (XRMI, STAR, FMI)

• Acquisition of electrical borehole image logs
• Horizontal vs. vertical resolution, sampling rate, azimuthal coverage, other specs…
• Log quality control, recognition of drilling, acquisition and processing artefacts
• Data processing (equalization, normalization, EMEX correction, bad button correction)
• How to read field logs of electrical borehole image logs

3. Other types of Borehole Image Logging

• Common acoustic borehole image logs (CAST, UBI)
• Electrical imaging in Oil-Base Mud (OBI, GeoExplorer, OBMI, Quanta Geo)
• Cameras, videos, Logging-While-Drilling methodologies
• Rock sampling and borehole image logging
• Core-Log calibration

4. Structural interpretation of borehole image logs

• Dip set classifications
• Structural dip determination and structural dip removal
• Faults, micro-faults, unconformities, introduction to fractures
• Thin bed analysis, sand count analysis
• Stereographic techniques (stereonets, rosettes, Bengtson/Stick plots, Walkout plots)
• Borehole image log-derived near-wellbore cross-sections, pseudo-3D displays

Part 2: Geomechanical, sedimentological and textural image analysis of borehole image logs, integrated log analysis - 7 December 2023

4. Geomechanical/Fracture interpretation of borehole image logs

• Fracture classifications
• Fracture aperture calculation
• Basement interpretation and basement fractures
• In-situ stress analysis from borehole image logs
• Borehole shape anomalies, breakout, knockouts
• Fracture spacing and wellbore bias correction
• Discrete Fracture Network modelling

5. Sedimentological interpretation of borehole image logs

• Common key sedimentary structures resolvable with borehole images (bedding, planar/trough x-bedding, scours, soft sediment deformation, slumps…)
• Palaeotransport analysis
• Clastic reservoir evaluation examples
• Carbonate reservoir evaluation examples

6. Textural borehole image log/facies interpretation

• Background resistivity determination
• Summary logs (isolated/connected vug analysis, resistivity patches etc...)
• Electrofacies classification
• Introduction to Reservoir Rock Typing
• Examples of integrated analysis (image logs, core, petrophysical/production data)