D083 Petrophysics and Formation Evaluation: Principles and Practice (Distance Learning)

Course Facts

Course Code:
5 days
Virtual Classroom
4.0 Continuing Education Units
40 Professional Development Hours
Certificate Issued Upon Completion


The course examines the fundamental concepts, vocabulary, and techniques used in petrophysics, exploring the physical properties of rock formations and their pore fluids, and demonstrating how these properties are estimated both in the laboratory and the wellbore. It focuses on the key petrophysical ideas that underpin petrophysical analysis and how downhole logs and core measurements enable quantitative estimates of hydrocarbons in place.

Duration and Training Method

A virtual classroom course divided into10 three-hour webinar sessions over a two-week period (equivalent to a five-day classroom course), comprising lectures, discussion, case studies, and practical exercises to be completed by participants during and between sessions.

Participants will learn to:
  1. Illustrate the geophysical parameters, petrophysical core analysis, capillary pressure, and fluid distribution data required for reservoir evaluation.
  2. Appraise the nature of the borehole environment.
  3. Illustrate how data from the main logging tools is acquired and undertake petrophysical analysis using these data.
  4. Establish lithology and calculate porosity from open hole wireline log and core data.
  5. Calculate water saturation from open hole wireline log and core data.
  6. Establish the key petrophysical parameters from wireline logs.
  7. Understand the principles of fluid sampling and borehole pressure measurements as a complementary approach to petrophysical analysis.
  8. Define gross, net and pay, and understand how these petrophysical concepts may be applied.
  9. Demonstrate how shale content in a clastic reservoir can be estimated and consider the effects of shale on the petrophysical analysis.
  10. Illustrate the principle petrophysical differences between conventional reservoirs and unconventional shale reservoirs.
This petrophysics course focuses on the main petrophysical attributes of porosity and saturation and how these parameters can be estimated in the laboratory from core, and downhole in the reservoir from logs. Topics covered include: the borehole environment, petrophysical properties, geophysical parameters, core analysis and special core analysis, wettability, capillary pressure and fluid distribution, and log measurements and interpretation. Particular emphasis is given to explaining principles underpinning the different measurements and the limitations of petrophysical data. Each lecture is typically associated with a short practical exercise to demonstrate specific points and to enable the student to apply their knowledge and develop their skills.

The main emphasis of the course is on evaluating the hydrocarbons in place (porosity and saturation) in conventional reservoirs; permeability and the concepts of gross, net and pay are also introduced and discussed. In addition, the course considers the important effects of wettability and capillary pressure on the fluid distribution in the reservoir.

The course also briefly introduces the petrophysical analysis of unconventional hydrocarbon reservoirs and considers the estimation of the adsorbed and free gas components, and the role of organic content and kerogen, introducing the concepts of Langmuir isotherms, and Langmuir pressure and volume.

Both core analysis and log analysis are considered throughout this course. The integration of these core and log data is key to estimating the hydrocarbons in place in both conventional and unconventional hydrocarbon reservoirs.

Topic 1

  • Introduction to D083
  • Petrophysical Properties: definitions and controls
  • Geophysical Parameters
  • Exercise: capillary pressure curves
  • Exercise: porosity from density and sonic measurements

Topic 2

  • Conventional and Special Core Analysis
  • Borehole Environment and Downhole Logging Principles
  • Spontaneous Potential and Gamma Ray Logs
  • Exercise: Archie a, m and n parameters from core
  • Exercise: Rw, Archie m, Archie n, effect on water saturation

Topic 3

  • Density, Pe, and Neutron Logs
  • Lithology and porosity from logs
  • Exercise: lithology and porosity from logs

Topic 4: Formation Factor, Archie 'm' and Water Resistivity

  • Pe interpretation
  • Acoustic Logging Tool
  • Formation Factor
  • Specialty Logging Tool: Image Logs
  • Exercise: clean formations –estimating Rw and fluid salinity

Topic 5: Resistivity Index, Archie 'n' and Water Saturation

  • Resistivity Index and Water Saturation
  • Fluid Distribution in the Reservoir
  • Resistivity Logging Tools
  • Specialty Logging Tool: Spectroscopy
  • Exercise: Pressure measurements and fluid distribution
  • Exercise: Porosity and Saturation from logs

Topic 6

  • Specialty Logging Tools: Nuclear Magnetic Resonance
  • Rock Typing
  • Exercise: Lithology, Porosity, Saturation and Fluid Type

Topic 7

  • Shaly Sands and Thin Beds

Topic 8

  • Net and Gross Pay
  • Low Resistivity Pay
  • Specialty Logging Tools: Dielectric

Topic 9

  • Shale Reservoirs
    • Shale Reservoirs Introduction
    • Petrophysical models & TOC
    • Free gas: Porosity & Saturation
    • Permeability
    • Geomechanics
  • Concluding discussions
  • Summary

Who should attend

Newly graduated scientists and petrophysicists are the main target audience, together with geologists, geophysicists and engineers who communicate with petrophysicists in regional evaluations, prospect generation and development studies.

Prerequisites and linking courses

There are no formal prerequisites for this class, due to its introductory nature. Some knowledge of petrophysics may be advantageous, but not essential.

There are a number of supplimentary and/or follow on classes directly related to the learning from D083.  For more on Well Logs, there is N003/D003 (Geological Interpretation of Well Logs) or N121 (Modern Petrophysical Well Log Interpretation).  For more detail on working with core, N095 (Integrating Core and Log Data for Reservoir Characterisation) deals with core from drilling to interpretation.

N030 (Rocks and Fluids: Practical Petrophysics, Isle of Wight UK), is a direct follow up for this class and assumes knowledge of this class before attendance. Follow up classes at Skilled Application Level include N054 (Petrophysics in Reservoir Evaluation), N187 (Low Resistivity, Low Contrast Pay), N267 (Petrophysics for Shale Gas Reservoirs) and N073/D073 (Integration of Sedimentology, Petrophysics and Seismic Interpretation for Exploration and Production of Carbonate Systems). All of these classes do assume a working knowledge of Petrophysics, which this class can provide.

Click on a name to learn more about the instructor

David Eickhoff

Jeff Kelley

Dates for this Course



30 Nov. 2020
Event Code:
USD $5,160 (Exclusive of tax)

Related Subjects

The exercises were a brilliant addition to the course and helped further understanding.