Advanced Well Log Interpretation

Introduction

This interactive, applications-driven training will highlight the techniques and principles of advanced well log interpretation for oil industry professionals who needs to deal with wireline and/or LWD logs in their daily job.

The training will explore the tools response explained from their physical principles as well as their relationship with the rock and fluid properties, most existing open hole logging technologies will be covered explaining their main applications and limitations. Advanced interpretation methods will be discussed with numerous examples and exercises including complex lithology interpretation techniques. At the end of the training seminar, we will hold a mini-workshop on optimum logging program selection based on: minimum set of logs needed for a proper evaluation, company budget and tools’ limitations.

This training will feature:

• Discussions on tools physical principles and applications
• Tool limitations on different borehole environments
• Tips and examples to identify and understand common logging issues
• Explanation of petrophysical concepts and techniques for advanced formation evaluation
• Application of interpretation methods in several examples and exercises

Objectives

By the end of this training, participants will be able to:

• Understand the physical principles of most existing logging tools
• Apply basic quality control techniques to validate logging data
• Know the main applications and limitations of the different tool readings
• Perform a quantitative formation evaluation on a complex lithology
• Understand the uses of advanced logging tools in complex lithology interpretation

Training Methodology

This training will utilise a variety of proven adult learning techniques to ensure maximum understanding, comprehension and retention of the information presented, the sessions will include visual, auditory and kinesthetic elements to cover the three different learning modalities. The daily sessions will be highly interactive and participative. This involves regular discussion of applications as well as hands-on exercises that will be solved manually and/or using Microsoft Excel.

Organisational Impact

The organization will benefit because:

• Having their personnel trained on log interpretation will help reduce human mistakes and improve efficiency
• Their personnel will know how to choose the optimum logging program based on company budget and objectives achievement
• Their personnel will be able to better assess data quality and integrity
• Their personnel motivation will increase as they understand better some critical data that is needed for their daily job

Personal Impact

Attendees will gain by participation in this training seminar as a result of:

• Obtaining a full understanding of logging tools principles and applications
• Learning how to choose the optimum logging program based on objectives and company budget
• Learning the principles and key indicators for log quality assurance and quality control
• Learning basic and advanced methods and techniques for log interpretation

Who Should Attend?

This training seminar is suitable to a wide range of professionals but will greatly benefit:

• Engineers in exploration and production departments
• Geologists, geophysicist and petrophysicist
• Petroleum, reservoir and drilling engineers
• In general, all other oil & gas industry professionals who are involved in logging data interpretation and validation

Seminar Outline

DAY 1

Basic Concepts Review and Resistivity Tools

• Petrophysics Concepts Review
• Introduction to Well Logging
• Log Classification according to the Measured Properties
• Auxiliary Measurements, Uses and Common Issues
• Basic Measurements: Gamma Ray and Spontaneous Potential
• Resistivity Theory, Principles and Applications of Laterologs
• Advanced Laterolog Logging Tools: Array and Azimuthal
• Microresistivity Devices, Principles and Applications

DAY 2

Conductivity and Nuclear Logging Tools

• Conductivity Tools, Uses and Limitations
• LWD Resistivity Determination Tools
• Advanced Induction Logging Tools, 3D Induction
• R_T and Invasion Profile Determination
• Formation Density Tools, Principles and Applications
• The Photoelectric Factor, a key lithology indicator
• Neutron Tools Principles and Applications
• Porosity Determination from Density and Neutron Logs
• LWD Nuclear Logging Tools
• Lithology Determination, Calibrations and Log Quality Control Parameters

DAY 3

Acoustic and Geological Logging Tools

• Basic Sonic Tools, Borehole Compensation
• Dipole Sonic Tools, Applications
• Mechanical Properties Determination and Uses
• Sonic Scanner Principles and Applications
• Common Sonic issues in the Borehole
• LWD Acoustic Tools
• Dipmeter Interpretation Principles
• Geological Image Logging Tools
• Structural and Stratigraphic Interpretation Principles
• Open, Partially Open and Healed Fractures Interpretation
• Faults and Unconformities Interpretation Examples
• Facies Analysis for reservoir characterization with Image Logs
• Ultrasonic Logging Tools

DAY 4

Advanced Logging Tools and Introduction to Formation Evaluation

• Nuclear Magnetic Resonance, Principles and Applications
• Relaxation Mechanisms and their association with Fluid and Rock Properties
• Porosity, Irreducible Water Saturation and Permeability Determination
• Advanced Fluid Determination Methods: 3D map T1-T2-Difussion
• Dielectric Tools Principles and Applications
• Saturation Determination Parameters, m, n and CEC
• Geochemical Logging tools
• Complex Lithology Evaluation Examples
• Formation Evaluation Principles
• R_w Determination Methods
• Crossplots Utilization, Hingle and Pickett Plots
• Graphical Interpretation Techniques for Porosity and Lithology

DAY 5

Complex Lithology Evaluation, Formation Testers and Mini-Workshop

• Saturation Determination Equations and Techniques
• Complete Formation Evaluation for Complex Lithology
• Reservoir Pressure Determination Tools
• Pre-test Interpretation
• Lost Seal, Dry Tests and Supercharging
• Pressure Gradient Interpretation
• Fluid Sampling, Optical and Composition Fluid Analyzers
• Advanced Probes for Special Well and Reservoir Conditions
• Permeability Determination
• Mini-workshop on Logging Program Selection