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Petroleum Rock Mechanics - 1st Edition - ISBN: 9780123855466, 9780123855473

Petroleum Rock Mechanics

1st Edition

Drilling Operations and Well Design

Authors: Bernt Aadnoy Reza Looyeh
Paperback ISBN: 9780123855466
eBook ISBN: 9780123855473
Imprint: Gulf Professional Publishing
Published Date: 26th May 2011
Page Count: 376
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Petroleum Rock Mechanics: Drilling Operations and Well Design covers the fundamentals of solid mechanics and petroleum rock mechanics and their application to oil and gas-related drilling operations and well design. More specifically, it examines the role of formation, strength of rock materials, and wellbore mechanics, along with the impact of in-situ stress changes on wellbore and borehole behavior. Practical examples with solutions and a comprehensive glossary of terminologies are provided. Equations are incorporated into well-known failure criteria to predict stresses and to analyze a range of failure scenarios throughout drilling, well operation, and well completion processes. The book also discusses stress and strain components, principal and deviatoric stresses and strains, materials behavior, the theories of elasticity and inelasticity, probabilistic analysis of stress data, the tensile and shear strength of rocks, wellbore stability, and fracture and collapse behavior for both single and multi-lateral wells. Both inexperienced university students and experienced engineers will find this book extremely useful.

Key Features

  • Clearly applies rock mechanics to on and off shore oil and gas drilling
  • Step by Step approach to the analyze wellbore instabilities
  • Provides worked out examples with solutions to everyday problems


Reservoir Engineers, Production Engineer, Drilling Engineers, Exploration Geophysicists

Table of Contents




About the authors

List of symbols

Chapter 1. Stress/Strain Definitions and Components

1.1. General concept

1.2. Definition of stress

1.3. Stress components

1.4. Definition of strain

1.5. Strain components

Chapter 2. Stress and Strain Transformation

2.1. Introduction

2.2. Transformation principles

2.3. Two-dimensional stress transformation

2.4. Stress transformation in space

2.5. Tensor of stress components

2.6. Strain transformation in space

Chapter 3. Principal and Deviatoric Stresses and Strains

3.1. Introduction

3.2. Principal stresses

3.3. Average and deviatoric stresses

3.4. General interpretation of principal stresses

3.5. Two-dimensional stress analysis

3.6. Properties of strain

Chapter 4. Theory of Elasticity

4.1. Introduction

4.2. Materials behavior

4.3. Hooke's law

4.4. Hooke's law in shear

4.5. Analysis of structures

4.6. Theory of inelasticity

4.7. Constitutive relation for rocks

Chapter 5. Failure Criteria

5.1. Introduction

5.2. Failure criteria for rock materials

5.3. The von mises failure criterion

5.4. Mohr-coulomb failure criterion

5.5. The griffith failure criterion

5.6. Hoek-brown failure criterion

5.7. Druker-prager failure criterion

5.8. Mogi-coulomb failure criterion

Chapter 6. Introduction to Petroleum Rock Mechanics

6.1. Introduction

6.2. Definition and classification of rocks

6.3. Petroleum rock mechanics

6.4. Why study stress in rocks?

6.5. Units of measurement

Chapter 7. Porous Rocks and Effective Stresses

7.1. Introduction

7.2. Anisotropy and inhomogeneity

7.3. Anisotropic rocks, transversal isotropy

7.4. Porous rock

7.5. Formation pore pressure

7.6. Effective stress

7.7. Formation porosity and permeability

Chapter 8. In-Situ Stress

8.1. Introduction

8.2. Definitions

8.3. in-situ principal stresses

8.4. Measurement and estimation of in-situ stresses

8.5. Probabilistic analysis of stress data

8.6. Bounds on in-situ stresses

8.7. Stress directions from fracture traces

Chapter 9. Rock Strength and Rock Failure

9.1. Introduction

9.2. Strength of rock material

9.3. Empirical correlations

9.4. Formation fracture gradient

9.5. Laboratory testing of intact rocks

9.6. Rock tensile strength

9.7. Rock shear strength

Chapter 10. Stresses Around a Wellbore

10.1. Introduction

10.2. State of stresses around a wellbore

10.3. Properties of rock formation around a wellbore

10.4. Equations governing stress analysis

10.5. Analysis of stresses around a wellbore

10.6. Isotropic solution

10.7. Anisotropic solution

Chapter 11. Wellbore Instability Analysis

11.1. Introduction

11.2. Analysis procedure

11.3. Wellbore fracturing pressure

11.4. Wellbore collapse pressure

11.5. Instability analysis of multi-lateral boreholes

11.6. Instability analysis of adjacent boreholes

11.7. Instability analysis of underbalanced drilling

11.8. Shallow fracturing

11.9. General fracturing model

11.10. Compaction analysis for high-pressure, high-temperature reservoirs

11.11. Breakthrough of a relief well into a blowing well

11.12. Fracture model for load history and temperature

11.13. Effects of flow induced stresses

11.14. Sand production modeling

Chapter 12. Wellbore Instability Analysis Using Inversion Technique

12.1. Introduction

12.2. Definitions

12.3. The inversion technique

12.4. Geological aspects

12.5. Analysis constraints

12.6. Inversion from fracture data and image logs

Chapter 13. Wellbore Instability Analysis Using Quantitative Risk Assessment

13.1. Introduction

13.2. Deterministic analysis versus probabilistic assessment

13.3. Why probabilistic assessment?

13.4. Quantitative risk assessment (QRA)

13.5. Quantitative risk assessment of underbalanced drilling

Chapter 14. The Effect of Mud Losses on Wellbore Stability

14.1. Introduction

14.2. Mud losses during drilling

14.3. Interpretation of the leak-off tests

14.4. Future developments for wellbore stability


Appendix A. Mechanical Properties of Rocks

Appendix B. The Poisson's Ratio Effect

Appendix C. Model for the Stress Bridge

Appendix D. Glossary Of Terms



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© Gulf Professional Publishing 2011
26th May 2011
Gulf Professional Publishing
Paperback ISBN:
eBook ISBN:

About the Authors

Bernt Aadnoy

Bernt Sigve Aadnøy is a Professor of Petroleum Engineering at the University of Stavanger, specializing in all aspects of well engineering, including geomechanics. He is also an Adjunct Professor at NTNU—the Norwegian University of Science and Technology in Trondheim. He worked for major operators in the oil industry from 1978 until 1994, when he transitioned to academia. Aadnøy has published more than 300 papers, holds 15 patents, and has authored or co-authored seven books, among them Modern Well Design, Petroleum Rock Mechanics, and Mechanics of Drilling. He was also one of the editors of the SPE book Advanced Drilling and Well Technology (Society of Petroleum Engineers). Aadnøy holds a BS degree in mechanical engineering from the University of Wyoming, an MS in control engineering from the University of Texas, and a PhD in petroleum rock mechanics from the Norwegian Institute of Technology. He was a recipient of the 1999 SPE International Drilling Engineering Award and is also a 2015 SPE/AIME Honorary Member and a 2015 SPE Distinguished Member. He was named SPE Professional of the Year 2018 in Norway.

Affiliations and Expertise

Professor of Petroleum Engineering, University of Stavanger, Norway

Reza Looyeh

Reza Looyeh is a registered Chartered Engineer, a Fellow member of the Institute of Mechanical Engineeres (IMechE) in the UK, and a member of the American Society of Mechanical Engineers (ASME). He holds a BSc in Mechanical Engineering from Tehran University, Iran (1989, Honors Degree), an MSc from Newcastle University, UK, in offshore engineering (1994), and PhD from Durham University, UK, in mechanical engineering (1999). He is presently a lead mechanical engineer at Chebron Pembroke Refinery in the UK, a position he has held since 2006. Dr. Looyeh has over 25 technical publications on a variety of topics and is a member of the Engineering Equipment and Material User's Association (EEMUA), Piping Systems Committee (PSC), and Materails Technology Committee (MTC), as well as an industrial advisor to IMechE for the oil and gas sector.

Affiliations and Expertise

Lead Engineer, Chevron Limited, Pembroke Refinery, UK

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