5 Contents Foreword 9 Introduction 11 Chapter 1 • Shear velocity measurement in boreholes 15 1.1 Context 15 1.1.1 Overview of invasive and non-invasive Vs measurements 15 1.1.2 Applications 17 1.1.3 Environmental conditions 18 1.2 Vs measurements by borehole seismic method 19 1.2.1 Downhole 21 1.2.1.1 The acquisition device 21 1.2.1.2 Analysis of a downhole (DH) 26 1.2.1.3 The specific example of offshore 29 1.2.2 Uphole 30 1.2.3 Crosshole 30 1.2.3.1 Prerequisites 31 1.2.3.2 The acquisition device 32 1.2.3.3 Crosshole analysis 36 1.3 Vs measurement by logging 39 1.3.1 Acoustic logging with high vertical resolution 39 1.3.2 PS Suspension Logging (PSSL) 41
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