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Physical Properties of Rocks - Fundamental Relationships and Model Concepts (PPH30)


    Complex interpretation of various petrophysical data increasingly applies theoretical models. In this course we study some of the fundamental concepts (Bound models, inclusion models for isotropic and anisotropic media, capillary models, Gassmann model) with respect of the physical assumptions, the conditions and restrictions of an application. For the models excel-worksheets are prepared in order to work with experimental data and discuss practical aspects of implementation in interpretation workflows.

    This interactive training course will feature
    • A brief refreshing presentation of petrophysical key properties (e.g. porosity, saturation) and their correlation with measured parameters (e.g. resistivity, wave velocities)
    • Systematic presentation of fundamental model concepts (simple averaging models, Hashin bounds, sphere pack models, capillary models, inclusion models) and their assumptions and conditions for application)
    • Demonstration of various models (using practical excel exercises); application on real data sets
    • Calculation of selected interpretation charts and templates
    • Discussion of preferred possibilities of implementation in practical algorithms

    Course Level: Foundation
    Instructor: Jürgen Schön

    Designed for you, if you are...

    • A geophysicist/petrophysicist, geologist, petroleum or reservoir engineer involved in geophysical data interpretation directed on rock properties
    • Working on development of interpretation algorithms and techniques for conventional or unconventional rock types/reservoirs
    • Interested in a physical background in petrophysics and development of model based algorithm

    How we build your confidence

    This course will give a presentation of fundamental model concepts and the formulation of final equations using prepared Microsoft Excel-worksheets. You will then discuss the function of the individual input parameters with respect to an integrated rock characterisation. On real data sets different models are applied and evaluated.

    The course is based on the textbook and implemented Excel worksheets written by the instructor: Physical Properties of Rocks – Fundamentals and Principles of Petrophysics, 2nd Edition, Schön, J.H., 2015, Elsevier B.V., Amsterdam.

    This textbook gives the detailed description, primary references and some additional aspects of application and implementation in interpretation techniques. Textbook and all Excel worksheets are part of the course material for each participant.

    The benefits from attending

    By the end of the course you will be able to:

    • Understand the principles of fundamental model concepts
    • Select models with respect to your interpretation problem and apply fundamental models for your problems
    • Test (using the MS Excel worksheets) different models and the possibility of application


    The course covers a comprehensive and concise presentation of the physical properties of rocks, based on theory as well as experimental investigations.

    • Rocks - their classification and general properties
    • Key reservoir properties of rocks (porosity, permeability, rock composition)
    • Properties determined by logging and seismic methods

    Model concepts in petrophysics, fundamental equations and assumptions
    • Rock as a multicomponent structured material
    • Model concepts - overview
    • Simple averaging relationships
    • Bound models
    • Sphere granular models
    • Capillary models
    • Inclusion models

    Selected applications I (pore space, electrical)
    • Porosity, permeability, specific surface
    • Electrical resistivity (Archie-type rocks, shaly rocks)

    Selected applications II (elastic)
    • Voigt, Reuss, and Hashin-Shtrikman bounds
    • Sphere pack models
    • Inclusion models, Kuster - Toksöz, Budiansky - O’Connell, Hudson model
    • Gassman and Biot model - modelling of fluid effects

    Selected applications III
    • Relationships between different properties
    • Petrophysics behind crossplots and rock physics template




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