- Print ISBN 9780444537966
- Electronic ISBN 9780444537973
'Physical Properties of Rocks - a Workbook' is a symbiosis of a brief description of physical fundamentals of rock properties (based on typical experimental results and relevant theories and models) with a guide for practical use of different theoretical concepts. For this purpose a companion web site contains a selection of model based equations in excel worksheets for practical application and training by the user to work with his own data (or to ''play" in order to demonstrate the effects of various input information and to demonstrate the effects of various input information in petrophysical work.
In two special chapters the problem of relationships between petrophysical parameters based on various model concepts is presented as a foundation for combined interpretation. This part also contains the author's 'structured model'.
The workbook is a result of the more than 40 years experience of the author in teaching at universities and industrial courses.
Students and professionals working in the areas of applied geophysics, well-log analysis, and reservoir engineering as well as geophysicists in engineering, geotechnics, hydrogeology, and geothermal applications
Introduction 1. Rocks – their classification and composition Overview, Introduction Igneous (magmatic) rocks Metamorphic rocks Sedimentary rocks 2. Pore space properties Overview, Introduction Porosity Specific internal surface Fluids in the pore space – the term "saturation" Permeability Wettability Fluid distribution – capillary pressure in a reservoir 3. Nuclear Magnetic Resonance (NMR) petrophysical properties Physical origin, the principle of a NMR-measurement Description of the relaxation process (longitudinal and transverse relaxation) NMR Relaxation mechanisms of fluids in pores and fluid-surface effects Bulk relaxation and surface relaxation Diffusion-induced relaxation Description of relaxation as a multi-exponential decay – data inversion Applications Porosity and pore volume partitioning Pore size, capillary pressure and permeability estimate Fluid (hydrocarbon) typing 4 Density Definition and units Density of rock constituents Density of rocks 5 .Nuclear/Radioactive Properties Fundamentals Natural radioactivity Origin of natural gamma radiation Potassium, Uranium, and Thorium in minerals Potassium, uranium, and thorium content of rocks Spectral and integral measurements – the API unit Applications Radioactive heat generation Gamma Interactions Fundamentals Gamma-Gamma-PE measurement for mineral identification Gamma-Gamma-Density measurement and porosity estimate Neutron interactions Fundamentals Porosity from neutron measurements 6. Elastic Properties Fundamentals Results of experimental investigations, empirical equations Rock constituents Velocity of igneous and metamorphic rocks Velocity of sedimentary rocks Relationships between Vp and Vs – the Castagna equation AVO (Amplitude Versus Offset) – basic principles and link to physical properties Anisotropy Theories Overview Bounds for elastic moduli: Voigt, Reuss and Hashin-Shtrikman bounds Sphere pack models nclusion models A simpified model for fractured rocks Gassman and Biot model – modelling of