A Geoscientist's Guide to PetrophysicsEditions TECHNIP, 2007 - 384 pages Geoscientists and Engineers taking an interest in Petrophysics, are struck by the contrasting treatment of the Physics Aspects and the Geology Aspects. In most publications, the Physics Aspect prevails. The rock itself is considered as a black-box whose microscopic structure is briefly described as a model sometimes remote from reality.But if we are to scale up isolated petrophyscial observations to an entire oil reservoir or an aquifer, it is essential to implement the powerful extrapolation tool of geological interpretation. This is clearly based on a good understanding of the relations between the petrophysical parameters studied and the petrological characteristics of the rock considered.This Geological approach of Petrophysics is at the heart of our project.The book is divided into two sections of different size: The first section (by far the largest) describes the various petrophysical properties of rocks. Each property is defined, limiting the mathematical formulation to the strict minimum but emphasising the geometrical and therefore petrological parameters governing this property. The description of the measurement methods is restricted to an overview of the principles required for good communication between the geoscientist and the laboratory petrophysicist. For each property, we detail one or two aspects of the relations between petrophysics and geology (e.g. the porosity/permeability relations in carbonate rocks or irregular water tables and stratigraphic traps).The second section concentrates on methodological problems and concerns, above all, the representativeness of the measurements and the size effects. The notions of Representative Elementary Volume, Homogeneity, Anisotropy, Rock Type, etc. provide a better understanding of the problems of up-scaling (Plug, Core, Log Analysis, Well Test). Lastly, we provide a description of several Porous Network investigation methods: Thin section, Pore Cast, Visualization of capillary properties, X-ray tomography. Contents: 1. Petrophysical Properties and Relations with Petrology. Calculation of Fluid Volumes in Situ (Accumulations): Static Properties. Fluid Recovery and Modelling: Dynamic Properties. Log and Geophysical Analysis. 2. Scale Changes and Characterization of Porous Media: Methods and Techniques. Measurement Representativeness and Reservoir Characterization. Porous Network Observation Techniques. References. Porosity Terms Glossary-Index. Subject Index. Author Index. |
Table des matières
Dynamic Properties | 123 |
Chapter 13 Log and Geophysical Analysis | 199 |
Chapter 21 Measurement Representativeness and Reservoir | 265 |
Chapter 22 Porous Network Observation Techniques | 325 |
XRay Diffraction and Fluorescence | 349 |
357 | |
Porosity Terms GlossaryIndex | 365 |
371 | |
381 | |
Expressions et termes fréquents
analysis applications calculated capillary pressure carried characteristics clay coefficient compressibility concerning conductivity considered core corresponds curve defined definition density depends depth described differential difficult dimension direction discussed drainage effect equivalent example experiment experimental expressed extremely fact factor field Figure flow fluid formation formula fraction fracture frequency geological given grain highly imbibition important increase initial interpretation known laboratory less limestone limited log analysis materials measurement mechanical mercury method mineral Note notion numerous observed obtain parameter permeability petrophysical phase physical pore porosity porous porous medium porous space possible practice problem production properties radius relation relative permeability representative reservoir resin resistivity rocks sample sandstones saturation scale shows similar soil solid sometimes stress structure surface taken term values variation various velocity volume water saturation wave wettability wetting X-ray