N360 Quantitative Log Analysis and Petrophysics
N360 Quantitative Log Analysis and Petrophysics
The course introduces the principles and practice of petrophysics as applied to conventional reservoir rocks (clastics and carbonates). It defines the petrophysical properties: porosity, permeability and water saturation and goes onto explain what controls them and how they can be reliably estimated. The course also considers some of the more artificial properties that are based on the above and shows how they are used to characterize petroleum reservoirs.
A five-day classroom course, comprising lectures supported by exercises of varying complexity. Most exercises will use real data from a variety of different reservoir types. All exercises can be completed using calculators and graphs (computers and special software are not required).
Participants will learn to:
The course starts with an introduction which includes an overview of the course and some useful tools and techniques. The rest of the course goes through the outputs of a petrophysical interpretation in the order they are typically generated: shale volume, porosity, saturation and permeability. Each property is defined, before explaining how it is measured on rock samples and why it is important. At the same time the logs that are most commonly used to estimate it are introduced and the way(s) they are transformed is described.
1.1 Petrophysical properties and data
1.2 Physical Properties of Rocks
1.3 Measuring porosity and permeability on core samples
1.4 Fundamentals of Logs and Log Analysis
1.5 Some Useful Tools and Techniques
Gamma-ray, SP and Shale Volume.
2.1 Clay minerals and why they are important in petrophysics
2.1 Shale and Clay Volume
2.2 Natural Gamma-ray Activity
Density and Porosity
3.2 Density and the density log
3.3 Porosity from Density
3.4 More on Porosity
More Porosity Logs
4.1 Neutron Porosity
4.4 Estimating porosity and shale volume from sonic and neutron logs
4.5 Combining Measurements
Resistivity and Saturation
5.2 Resistivity Tools
5.3 Water Saturation
5.4 Resistivity and Saturation: Archie equation.
5.5 Modifi cations to the Archie equation (conductive minerals)
Hydrocarbon Eff ects on Logs
6.1 Specifi c eff ects of hydrocarbons on logs
6.2 Accounting for Hydrocarbon Eff ects
6.3 Accounting for Invasion
6.4 Fluid Substitution
7.1 Introduction, diff erent types of permeability
7.2 Controls on permeability
7.3 Estimating Permeability from Logs
Net, Pay and Averaging
8,1 Why Average?
8.2 Cut-off s and how they are chosen
Brief introduction to uncertainty
Fluid Distribution: Controls and Models
9.1 Introduction and Fundamentals
9.2 Water in Porous Rocks
9.3 Measuring Capillary Pressure Curves.
9.4 Real Fluids in Real Rocks
9.5 Contacts and Free water Level
9.6 The Saturation Height Function
Conclusion and the Future
The course is designed to give participants an appreciation of the practice of petrophysics. Anyone who uses petrophysical properties in their day to day work would benefit from attending. Petrophysicists at the start of their careers would also benefit from attending but it is not intended to cover the more advanced tools and techniques.
There are no prerequisites for this course.
Click on a name to learn more about the instructor
Martin Kennedy, SPE, is a consultant petrophysicist based in Perth, Western Australia. He began his career as a wireline-logging engineer. After leaving the field, Kennedy worked in R&D, for government and for several mid-sized British independents before moving to Perth as Woodside’s Chief Petrophysicist in 2003. He left after six years to concentrate on training and consulting. His career has spanned everything from field studies to quick-look evaluations as well as managing the petrophysics skill-pool for two companies. Kennedy has worked on most of the classic petroleum provinces outside North America (and a few within) as well as some more exotic areas. He now consults for a wide range of companies ranging from small Independents to Majors and specializes in areas that do not readily yield to standard techniques. His particular interests are carbonates; the way logging tools interact with geology; image logs; and interpreting old logs, bad logs, and bad/old logs. Kennedy holds a degree in chemistry from Bristol U. and a PhD degree in electrical engineering from Edinburgh U., and he serves on the JPT Editorial Committee.
Affiliations ans Accreditation
PhD Edinburgh University - Electrical Engineering
BSc Bristol University - Chemistry
N003: Geological Interpretation of Well Logs
N030: Rocks & Fluids: Practical Petrophysics (Isle of Wight, England)
N360: Quantitative Log Analysis and Petrophysics
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