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FE1: Basic Log Interpretation


2024 Programme

3 Days | £2150+VAT per attendee

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.

Target Audience​

Wellsite Geologists, Operations Geologists, Reservoir and Development Geologists, Drilling Engineers, Mudloggers, LWD Engineers, Directional Drillers, Support Staff.

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 Outline

Obtaining Well Logs
  • The Nature of Well logs

  • Conveyance Methods

  • Borehole Environment

  • Invasion

  • 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

  • Relationships

  • Borehole Environment

  • Invasion Profiles

  • Rw & Rmf

  • Porosity and Permeability

  • Resistivity and Water Saturation

  • Temperature Corrections

Wireline Logs: Theory of Operation
  • Spontaneous Potential

  • Gamma Ray

  • Resistivity Logs

  • Laterologs

  • Induction Logs

  • Microresistivity Logs

  • Neutron Porosity

  • Sonic

  • Formation Density

  • Dipmeter Tools

MWD & LWD Logging
  • Theory of Operation

  • Transmission Systems

  • Tool Configuration

  • Sensors

  • 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

Course Leaders

Martin B. Saunders

Martin B. Saunders

Training Manager

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