FE1: Basic Log Interpretation

Target Audience
  • Wellsite Geologists
  • Operations Geologists
  • Mud Loggers
  • MWD Operators
  • Directional Drillers
  • Technical & Support Staff
Course Aims
To provide an overview of Quick-Look Interpretation from traditional open-hole wireline and LWD logs.
This practical course uses worked examples and a final Case Study to allow students to practise and become familiar with basic geological and reservoir evaluation techniques.
Delegates will learn:
  • About the reasons for geophysical logging and information required
  • About the basic theory of operation of traditional open hole logging tools
  • How to interpret lithology from well logs
  • How to identify reservoir rocks and the location and type of fluids present
  • How to determine Porosity from Sonic, Density and Neutron Porosity tools and make simple corrections for lithology, shaliness and gas effects
  • How to identify hydrocarbon bearing zones and calculate water saturation using the basic Archie Formula while making corrections for environmental effects
  • About the differences between Wireline and LWD tools









Course Length
3 Days
Course Fee
£1500 (+VAT)
FE1: Course Outline
Obtaining Well Logs
The Nature of Well logs
Conveyance Methods
Borehole Environment
Log Scales and Presentation
Theory of Operation
  • Gamma Ray
  • Resistivity
  • Neutron Porosity
  • Density
  • Sonic
Log Interpretation
Log QC
Lithology Determination
  • Gamma Ray and S.P.
  • Density/Neutron
  • Crossplots
Facies and Environments
Reservoir Evaluation
Recognition of Permeability
Identification of Hydrocarbons
Fluid types & contacts
Porosity and Permeability Determination
Water Saturation (Sw) estimation
Wireline Logs: Basic Concepts
Types of Open Hole Logs
Information Required
Log Header
Borehole Environment
Invasion Profiles
Rw & Rmf
Porosity and Permeability
Resistivity and Water Saturation
Temperature Corrections
Theory of Operation
Spontaneous Potential
Gamma Ray
Resistivity Logs
  • Laterologs
  • Induction Logs
  • Microresistivity Logs
Neutron Porosity
Formation Density
Dipmeter Tools
MWD & LWD Logging
Theory of Operation
Transmission Systems
Tool Configuration
Operating Procedures and Practice
MWD/Wireline Response Comparison
Geological Interpretation
Log QC Procedures
Identification of Lithology
Environment and Facies
Identification of Permeability
Identification of Porosity
Geosteering Applications
Reservoir Evaluation
Quick Look Porosity Calculations
Identification of Hydrocarbon Bearing Zones
Hydrocarbon Type Evaluation
Saturation Calculations
  • Archie
  • Shaly sands
  • Carbonates
  • Resistivity Ratio
  • Cross-Plots