Petroleum Rock Mechanics book cover

Petroleum Rock Mechanics

Drilling Operations and Well Design

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.


Reservoir Engineers, Production Engineer, Drilling Engineers, Exploration Geophysicists

Paperback, 376 Pages

Published: May 2011

Imprint: Gulf Professional Publishing

ISBN: 978-0-12-385546-6


  • Preface


    About the Authors

    List of Symbols

    Part One - Fundamentals of Solid Mechanics

        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



        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



        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



        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



        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



    Part Two - Petroleum Rock Mechanics

        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



        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



        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



        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



        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



        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



        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



        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



        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 Development 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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