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Petrophysics 3 day short course – Martin Kennedy

Wednesday, July 11 - Friday, July 13

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Guest Speaker: Martin Kennedy

Martin Kennedy is a Perth based consultant petrophysicist. He began his career as a wireline logging engineer with Schlumberger over thirty years ago and has been involved with acquiring and interpreting logs and other well data ever since. He has subsequently worked for several large independent operators as well as stints in government and R. and D., always in petrophysics. He has been running training courses since the 1990s when he began a long association with Nautilus (now part of RPS). He began consulting in 2008 and since then has also been running customized ‘In-house’ courses. He is an author of two text books ‘Practical Petrophysics’ (2016) and the third edition of ‘The Geological Interpretation of Well Logs’ (2014).

An Introduction to Quantitative Log Analysis and Petrophysics

Hosted by Buru Energy

buru

Summary

The course introduces the principles and practice of petrophysics as applied to conventional reservoir rocks (clastics and carbonates). It defines the fundamental petrophysical properties: porosity, permeability and water saturation and what controls them. Each property is discussed alongside the standard methods used to estimate it from both core plugs and logs. In addition, some of the more contrived properties like Net and Pay, that are conventionally used to describe reservoirs will be introduced.

Learning Outcomes

On completion of the course participants will

  1. Be able to define porosity, water saturation and permeability and appreciate the difference between total and effective porosity models.

  2. Understand how porosity is measured in the laboratory and how it can be estimated from density and other physical properties measured by logging tools.

  3. Have a qualitative understanding of how porosity tools work: density, sonic, neutron porosity and NMR.

  4. Define electrical resistivity and what determines it in porous solids (Archie equation).

  5. Understand how resistivity is measured in the borehole and how resistivity measurements can be used to estimate water saturation.

  6. Appreciate what controls permeability, how it is measured and how it determines deliverability in wells.

  7. Calculate reservoir average properties and use them to characterize reservoirs.

  8. Have a qualitative understanding of what controls the distribution of oil and gas in a reservoir.

Training Method

Lectures supported by exercises of varying complexity. Where-ever possible 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 needed).

Who should attend

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.

Pre-requisites

None.

Technical Content

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.

Day 1 Introduction

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

2.3 SP

Day 2 Density and Porosity

3.1 Introduction

3.2 Density and the density log

3.3 Porosity from Density

3.4 More on Porosity

More Porosity Logs.

4.1 Neutron Porosity

4.2 Sonic

4.3 NMR

4.4 Estimating porosity and shale volume from sonic and neutron logs

4.5 Combining Measurements.

Day 3 Resistivity and Saturation

5.1 Introduction

5.2 Resistivity Tools

5.3 Water Saturation

5.4 Resistivity and Saturation: Archie equation.

5.5 Modifications to the Archie equation (conductive minerals)

Hydrocarbon Effects on Logs.

6.1 Specific effects of hydrocarbons on logs

6.2 Accounting for Hydrocarbon Effects.

6.3 Accounting for Invasion.

Permeability

7.1 Introduction, different 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-offs and how they are chosen.

8.3 Problems.

Details

Start:
Wednesday, July 11
End:
Friday, July 13

Venue

Buru Energy
Level 2, 16 Ord Street, Perth, WA 6005 Australia
+ Google Map
Phone:
(08) 9215 1800
Website:
www.buruenergy.com

Organizer

PESA Western Australia
Email: