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Online Training: Image Log Analysis; Past, Present and New Technology

05 - 07 December 2023
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Event type:
Contributes to CPD, Online Training, Virtual event
Organised by:
Geological Society Events, Online Training
Virtual event
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This course is concerned with the historical development, physical measurement principles and applications of technologies that were originally designed to obtain the orientation of strata in the subsurface, but are now used to provide a full geological description of the formations crossed by the borehole.

The course will be suitable for a wide range of professionals including petrophysicists, geophysicists, geomodellers and reservoir engineers from oil, gas, geothermal, water, nuclear and CCS industries that have used or are planning to acquire dipmeter logs/borehole image logs as part of their data acquisition campaign. Some basic knowledge of well logging methods would be beneficial.

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)

1. Learn about the history of dipmeter logging, downhole navigation systems, dip computation methods and the basic rules for dipmeter log interpretation. .

2. Understand the physical measurement principles of electrical and acoustic borehole image logging tools.

3. Understand the complexities of borehole image logging in oil-base muds.

4. Learn the basics of processing borehole image logs and the recognition of acquisition, processing or drilling artifacts.

5. Be able to discuss core – borehole image log calibration issues.

6. Understand the basics of a structural interpretation from borehole image logs, in terms of tectonic tilt, faults and fractures.

7. Describe how to extract and interpret geomechanical information from borehole image logs (e.g. breakouts, induced fractures).

8. Explain the approach towards a sedimentological interpretation of borehole image logs.

9. Explain the approach towards a textural interpretation of borehole image logs.

10. Understand the benefits and limitations of borehole image logs in an integrated wellbore analysis.


Jurry van Doorn

Jurry van Doorn is a Geologist with 31 years’ experience in the oilfield service industry. After his retirement from Schlumberger, he joined  Geode-Energy Ltd 3 as a geologist consultant.

Dr. Melissa Johansson

Dr. Melissa Johansson is a Geologist with extensive experience in the oilfield service industry (17 years), geology consulting business (8 years) and academia (3 years).


Registration for this course will close at 12.00 GMT on 4 December 2023

We offer discounts on group bookings of 5 or more, please email [email protected] to enquire.

Course Fees

Fellow  £295
Non-Fellow  £595
Student Member  £50.00
Student Non-Member  £100
Corporate Patron  £295


We offer students a generous discount, please verify your student status by either registering with your student email address, or upload a photograph or your student identification/ acceptance letter.

The society offers a limited number of concessionary rates for those in financial hardship. Please contact [email protected] (please note you may be required to provide details/evidence to support your application for this rate).


This course will be held virtually, starting at 13.00 GMT until approximately 17.30 GMT on both days.


Please contact [email protected] with any enquiries.

Register now