Oil and Gas

Oil and Gas | Petrophysics

Geological Interpretation of Well Logs

Course Code: N003
Instructors:  Jenny GarnhamMartin Kennedy
Course Outline:  Download
Format and Duration:
5 days

Next Event

Location: Stavanger
Date:  11 - 15 Nov. 2024
Start Time: 09:00 CET
Event Code: N003a24C
Fee From: GBP £4,600 (exc. Tax)


This course is an introduction to the principles and applications of conventional well logs. It shows how combinations of logs can be used to interpret mineralogy, lithology, facies, depositional environments and key sequence stratigraphic markers such as flooding surfaces. Sessions start by considering the individual measurements but as the course progresses there is an increasing emphasis on combinations of measurements and the trends with depth. The climax of the course is an exercise to produce a robust correlation scheme using data from three wells.

Business Impact: The ultimate objectives of this course are to be able to use sets of well logs to establish robust correlation schemes, guide well placement and derive property inputs for geological modelling. These skills will enable participants to reduce risk, understand uncertainty, improve success rates, and reduce costs throughout the life cycle of subsurface projects.

Participants will receive a digital copy of the text book “Geological Interpretation of Well Logs” by Malcolm Rider and Martin Kennedy.


"This was one of the most effective classes I've taken. I feel excited to get back into my log data next week."


Event Code: N003a24C
Duration: 5 days
Instructors: Jenny Garnham
Dates: 11 - 15 Nov. 2024
Start Time: 09:00 CET
Location: Stavanger
Fee From
GBP £4,600 (exc. Tax)
Good Availability
Please login to book.

Duration and Training Method

This is a classroom course comprising a mixture of lectures, discussion, case studies, and practical exercises.

Course Overview

Participants will learn how to:

  1. Differentiate the functions, physical principles, and limitations of logging tools used in a standard logging suite and their applications for geological interpretation.
  2. Understand the differences between logs acquired using wireline conveyance and logs acquired whilst drilling.
  3. Use well logs to determine lithologies, interpret facies, and identify stratigraphic and structural features.
  4. Interpret well logs and integrate with other available data, such as core and cuttings, to produce a coherent geological evaluation.
  5. Correlate between wells using well logs, incorporating other available down-hole data.
  6. Analyse the interpretation patterns of imaging and dipmeter tools to indicate structural and stratigraphic features.
  7. Undertake a quicklook analysis to calculate shale volume, porosity, and water saturation from well logs.

In this class, each individual logging tool is described in terms of basic functions, physical principles and geological interpretation. Log data is then used as a complementary set for lithology interpretation, facies recognition, log sequence analysis and correlation.

The following timetable is intended as a guide only and may vary depending on the instructor and experience of the class.

Topic 01:

  • Introduction
  • Impact of Logging
  • Environment and Deployment
  • Depth Shifting Exercise
  • Log Summary Exercise

Topic 02:

  • Gamma and Spectral Gamma Ray Theory and Usage
  • Understanding Caliper
  • Worksession: Caliper and Gamma Ray
  • Worksession: Spectral Gamma Ray

Topic 03:

  • Resistivity Logs
  • SP Logs
  • Worksession: Resistivity Profiles

Topic 04:

  • Traditional Sonic Logging
  • Well Tying and Modern Sonic Logs
  • Worksession: Sonic Conversion

Topic 05:

  • Density Logs
  • Worksession: Shale Density
  • Neutron Logs
  • Density Neutron Combination

Topic 06:

  • Integrating Lithology
  • Worksession: Lithology Log
  • Introduction to NMR

Topic 07:

  • Dipmeter
  • Image Logs
  • Worksession: Image logs

Topic 08:

  • Core Photo and Logs
  • Facies and Sequences from Logs
  • Worksession: Sequence Analysis  

Topic 09:

  • Stratigraphy and Correlation with Logs
  • Worksession: Correlation of 3 Wells

Topic 10:

  • Basic Rock Property Evaluation
  • Worksession: Basic Petrophysical Workflow

This course best suits those beginning to acquaint themselves with logs or those who do not use logs all the time and need a refresher. The course is aimed primarily at inexperienced Geoscientists, but is also good for new-hire Petrophysicists and experienced Technologists, Reservoir and Petroleum Engineers.

Jenny Garnham

Jenny became an independent Petrophysical Consultant in 2002 and has since gained a wide range of experience consulting for operating companies (UK and worldwide), in addition to heading up the petrophysical discipline within TRACS consultancy. She has provided petrophysical support to a number of Field Development and Appraisal studies as well as planning and implementing core and logging operations on behalf of a number of small Operators. She is a co-leader for a number of ‘Open Air’ reservoir modelling training courses with TRACS training.

After graduation, Jenny joined Enterprise Oil in 1990 as a Petrophysicist working in London, gaining experience in Exploration and Appraisal, as well as equity redetermination. She moved to Aberdeen in 1997 to join the Nelson Field Development Team and ultimately managed data acquisition and evaluation of all the company’s operated developments.

Jenny became an instructor for Nautilus in 2007. She has co-instructed N095 and N033, and tutored N003, all of which are courses that draw upon her skills and knowledge of Geology, Reservoir Modelling, and Petrophysics. Her main fields of interest are reservoir characterisation, integrating descriptive and quantitative core data with logs (old and modern) as part of a reservoir modelling team. She has extensive knowledge of conventional clastic reservoirs (including most North Sea plays), but has also worked with carbonates, volcanic reservoirs, and tight gas. 

Affiliations and Accreditation
BA University of Oxford - Geology
PhD Imperial College - Volcanology

Courses Taught
N003: Geological Interpretation of Well Logs
N033: Characterisation, Modelling, Simulation and Development Planning in Deepwater Clastic Reservoirs
N095: Integrating Core and Log Data for Reservoir Characterisation
N537: Geological Interpretation of Well Logs for Facies and Sequences
N713: Petrophysical Inputs to Reservoir Modelling

Martin Kennedy

Martin Kennedy, is a consultant petrophysicist based in Perth, Western Australia. He began his career as a wireline-logging engineer. After leaving the field, Kennedy worked in R&D, for government and for several mid-sized British independents before moving to Perth as Woodside’s Chief Petrophysicist in 2003. He left after six years to concentrate on training and consulting. His career has spanned everything from field studies to quick-look evaluations as well as managing the petrophysics skill-pool for two companies. Kennedy has worked on most of the classic petroleum provinces outside North America (and a few within) as well as some more exotic areas. He now consults for a wide range of companies ranging from small Independents to Majors and specializes in areas that do not readily yield to standard techniques. His particular interests are carbonates; the way logging tools interact with geology; image logs; and interpreting old logs, bad logs, and bad/old logs. Kennedy holds a degree in chemistry from Bristol U. and a PhD degree in electrical engineering from Edinburgh U.

Affiliations and Accreditation
PhD Edinburgh University - Electrical Engineering
BSc Bristol University - Chemistry

Courses Taught
N003: Geological Interpretation of Well Logs
N030: Rocks & Fluids: Practical Petrophysics (Isle of Wight, England)
N360: Quantitative Log Analysis and Petrophysics

CEU: 3.5 Continuing Education Units
PDH: 35 Professional Development Hours
Certificate: Certificate Issued Upon Completion
RPS is accredited by the International Association for Continuing Education and Training (IACET) and is authorized to issue the IACET CEU. We comply with the ANSI/IACET Standard, which is recognised internationally as a standard of excellence in instructional practices.
We issue a Certificate of Attendance which verifies the number of training hours attended. Our courses are generally accepted by most professional licensing boards/associations towards continuing education credits. Please check with your licensing board to determine if the courses and certificate of attendance meet their specific criteria.