Direct Current Geoelectric Sounding
Principles And Interpretation
Published on 2. December 2012
144 pages
978-0-444-60183-4 (ISBN)
Description
Direct Current Geoelectric Sounding: Principles and Interpretation provides a comprehensive review of the Schlumberger method of geoelectric sounding, as well as current methods of interpretation. It explores the theoretical foundations of geoelectric sounding, the relative advantages and limitations of the two symmetrical arrangements for vertical electrical sounding, the techniques of interpretation for Wenner sounding curves, and dipole sounding. This volume is based on educational materials used in the study of geoelectric sounding. It begins with an overview of the theory of current flow in a horizontally stratified Earth, followed by a discussion of how the resistivity of the ground is measured. The book explains the current flow in a homogeneous anisotropic and horizontally stratified Earth, the principle of equivalence, and vertical electrical sounding. Moreover, it presents the basic principles and procedures for the construction of theoretical master curves. Asymptotic values of Schlumberger curves, the principle of reduction of two layers and of a three-layer Earth, and Tagg's method of interpretation are also discussed. The book explains the interpretation by curve-matching, characteristics of dipole electric sounding, and geological applications of electrical resistivity sounding. Engineering problems and application examples with self-explanatory diagrams are provided at the end of the chapters. This book will benefit undergraduate and postgraduate students who want to broaden their understanding of exploration geophysics, as well as professional exploration geologists and geophysicists, civil engineers, agricultural scientists, and researchers.
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P. K. Bhattacharya | Hari Pada Patra
Direct Current Geoelectric Sounding
Book
11/1968
Elsevier
€10.96
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Content
PrefaceChapter 1. IntroductionChapter 2. Theoretical Foundations Current flow in a homogeneous earth Resistivity measurement Apparent resistivity Current flow in a homogeneous anisotropic earth Current flow in a horizontally stratified earth Homogeneous earth Two-layer earth Three-layer earth Four-layer earth Principle of equivalence Vertical electrical sounding (V.E.S.) Dipole electrical sounding (D.E.S.) Example (computation procedure)Chapter 3. Schlumberger Sounding Type curves and available theoretical curves Two-layer curves Three-layer curves Four-layer curves Asymptotic values of Schlumberger curves Principle of reduction of two layers Principle of reduction of a three-layer earth Case I: H-type Case II: A-type Case III : K-type (modified A-type) Case IV: Q-type (modified H-type) Use of the principle of equivalence Pylaev's nomograms Graphical construction of empirical curves Construction of two-layer curves Construction of three-layer curves Construction of four-layer curves Qualitative interpretation Two-layer earth Three-layer earth Quantitative interpretation Interpretation of two-layer curves Interpretation of three-layer curves Interpretation of four-layer curves Effect of dip on interpretation Examples Graphical construction of three-layer field and master curves Graphical construction of four-layer curves Qualitative interpretation of field curves Interpretation of three-layer field curves Interpretation of four-layer and five-layer field curves Problems Problem on interpolation Problem on three-layer graphical construction Problem on four-layer graphical construction Problem on qualitative interpretation Problems on quantitative interpretationChapter 4. Wenner Sounding Comparison of Schlumberger and Wenner methods Asymptotic values and available theoretical curves Tagg's method of interpretation Two-layer case Three-layer case Interpretation by curve matching Example Problems Problem 1 Problem 2Chapter 5. Dipole Sounding Characteristics of dipole sounding Available curves and quantitative interpretation ProblemChapter 6. Geological Applications Engineering problems Ore prospecting and hydrogeological problems Ore prospecting Hydrogeological problems Structural mapping for oil Examples Example 1 Example 2 Problems Problem 1 Problem 2ReferencesIndexEnclosure loose Plates I-X
