14 Well seismic surveying and acoustic logging and fractured zone detection. In addition, it shows how acoustic logging can be used to evaluate the quality of well cementation. • The fourth chapter describes the benefits of combining measurements of formation velocities provided by VSP-type well tools and acoustic (sonic) tools. Based on a near surface example, it shows a tying method between sonic and check shots (VSP), which is used to obtain a time-depth relationship, tied to the seismic data and used for the conversion of logs into time and the calculation of synthetic seismograms. • The fifth chapter is an integrated case study of a karstic limestone aquifer that is relatively close to the surface (20 to 130 m). We show how multi-scale description of the reservoir can be realized by integrating the information provided by different 3D-THR surface seismic methods, full waveform acoustic logging, VSP with hydrophones, borehole optical televiewer and flow measurement. Note: In the oil sector, the word ‘well’ is commonly used to mean borehole. This notion is not ideal for geotechnology usage, where boreholes are drilled for investigation and not production. In this document, we will therefore use the word ‘well’ for all descriptions relating to a transfer of technology from the oil world to geotechnology. However, ‘borehole’ will be used in relation to common geotechnical methods. References Mari J. L., Arens G., Chapellier D., Gaudiani P., 1999, Geophysics of reservoir and civil engineering, Éditions Technip, Paris, ISBN 2-7108-0757-2. Mari J.L., Porel G, 2007, 3D seismic imaging of a near – surface heterogeneous aquifer: a case study, Oil and Gas Science and Technology, Rev IFP 63, 179-201. Doi: 10.2516/ogst/2007077. Mari J.L., Yven B., 2014, The application of high-resolution 3D seismic data to model the distribution of mechanical and hydrogeological properties of a potential host rock for the deep storage of radioactive waste in France, Marine and Petroleum Geology 53, 133-153.
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