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Geological Society, London, Engineering Geology Special Publications; 1997; v. 12; p. 75-88;
DOI: 10.1144/GSL.ENG.1997.012.01.06
© 1997 Geological Society of London

Section 2: Standards and Practices

Some improvements in the processing of borehole acoustic signals for the characterization of geological structures

A. Rousseau1 & D. Jeantet2

1 CNRS UniversitÉ Bordeaux 1, Groupe d’Etude des Ondes en GÉosciences, 351 cours de la LibÉration, F-33405 Talence cÉdex, France
2 CNRS BP 200, F-33405 Talence cedex, France

We show how a new type of 3D visualization of the raw data of full waveforms can be used as a method of signal processing, allowing the characterization of fractures, dykes, and soft/hard formation contacts. We provide a method of calculating the interface dip in adequate conditions and we propose a new means of calculating the velocities of all types of waves by ‘animation’. Finally we suggest a way to assess the dip azimuths.