Log Quality Control and Petrophysics

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£3050 per attendee

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Course Information

This short course introduces fundamental log quality control concepts for all open hole logs usually run in wells. The participants will learn how to effectively control the quality of all logs in real time. The exercises are developed with actual logs ran in real wells, so the participants will be exposed to log quality control on real data. At the end of the course the participants will be trained to perform log quality control on real time at wellsite as well as post-morten in the office.

The certification of the acquired data is a very critical aspect of wireline logging. It is performed through the observation of key quality indicators, the main objective of this course is to make all participants aware of these quality indicators as well as the different techniques to solve commonly found issues at the wellsite.

Engineers in exploration and production departments, geologists, geophysicist and petrophysicist, petroleum, reservoir and drilling engineers who are directly involved with data validation and interpretation of wireline and LWD logs.

1. Introduction

Principles of Metrology. The real environment. Log Quality Control Basic Principles. GR, SGR, SP and auxiliary measurements. Environmental effects and LQC.

2. Resistivity and Porosity Tools

Induction. Laterolog. Microresistivity Tools. Lithodensity. Neutron. Sonic Tools. Compensated Sonic. Dipole Sonic. Applications, Physical Principles and Log Quality Control.

3. Geological Imaging Tools

Basic Dipmeter Microresistivity and Ultrasonic Tools. Structural and Stratigraphic Interpretation Principles. Image Interpretation. Log Quality Control Main Indicators.

4. Other Advanced Logs

Nuclear Magnetic Resonance. Relaxation Mechanisms. Principles and Interpretation. Dielectric Logs. Geochemical logging tools. Applications, Physical Principles and Log Quality Control.

5. Formation testers and samplers

Pressure tests. Fluid Sampling. Sidewall Cores. Physical Principles, Interpretation and Log Quality Control Indicators.

6. Well Seismic

Checkshot. Vertical Seismic Profile. Offset and Multi-Offset VSP. Walkaway. Different source types. Air-guns and vibroseis trucks. Physical Principles, Interpretation and Log Quality Control Indicators.

7. Cement Evaluation Logs

CBL-VDL. Ultrasonic Images. Principles, Interpretation and Log Quality Control Indicators.

8. Course Final Conclusions

Petrophysics Basics. Water Saturation. Archie Equation. Rw, F, a, m, n. Shales. Lithology Effects on Log Readings. Normal and Abnormal Tool Responses. Log Quality Control Complete Process. LQC Exercises on several different sets of logs. Final Recommendations, Useful Tips and Best Practices.

Continuing Professional Development

35 HOURS CPD