Introduction to the resistivity surveying method. The resistivity of ...

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Table of Contents
1. Introduction to resistivity surveys 1
1.1 Introduction 1
1.2 Traditional resistivity surveys 1
1.3 The relationship between geology and resistivity 3
2. 2-D electrical imaging surveys 5
2.1 Introduction 5
2.2 Field survey method - instrumentation and field procedure 5
2.3 Pseudosection data plotting method 8
2.4 Forward modeling program exercise 8
2.5 Advantages and disadvantages of the different arrays 10
2.5.1 Wenner array 11
2.5.2 Dipole-dipole array 14
2.5.3 Wenner-Schlumberger array 15
2.5.4 Pole-pole array 15
2.5.5 Pole-dipole array 17
2.5.6 High-resolution surveys with overlapping data levels 18
2.5.7 Summary 19
2.6 Computer interpretation 19
2.6.1 Data input and format 19
2.6.2 Guidelines for data inversion 20
2.7 Field examples 24
2.7.1 Agricultural pollution - Aarhus, Denmark 24
2.7.2 Odarslov dyke - Sweden 25
2.7.3 Underground cave - Texas, U.S.A. 25
2.7.4 Landslide - Cangkat Jering, Malaysia 27
2.7.5 Old tar works - U.K. 27
2.7.6 Holes in clay layer - U.S.A. 27
2.7.7 Magusi River ore body - Canada 29
2.7.8 Marine underwater survey - U.S.A. 31
2.7.9 Time-lapse water infiltration survey - U.K. 31
2.7.10 Cross-borehole survey - U.K. 34
2.7.11 Wenner Gamma array survey - Nigeria. 35
2.7.12 Mobile underwater survey - Belgium. 36
3. 3-D Electrical Imaging Surveys 38
3.1 Introduction to 3-D surveys 38
3.2 Array types for 3-D surveys 38
3.2.1 Pole-pole array 38
3.2.2 Pole-dipole array 40
3.2.3 Dipole-dipole array 40
3.2.4 Summary 40
3.3 3-D roll-along techniques 41
3.4 3-D forward modeling program 41
3.5 Data inversion 43
3.6 Examples of 3-D field surveys 46
3.6.1 Birmingham field test survey - U.K. 46
3.6.2 Septic tank survey - Texas 48
3.6.3 Sludge deposit - Sweden 48
Copyright (1999-2001) M.H.Loke