Courses

This course starts by teaching the fundamentals of acoustic waveform propagation in a borehole and how the waveforms recorded by an array sonic tool can be processed and interpreted to obtain valuable quantitative information about the petrophysical and mechanical properties of the rocks. It contains an overview of sonic acquisition technologies (both Wireline and LWD) and explains the different constraints and limitations of each measurements (monopole, dipole, quadrupole). The course contains several practical exercises using Techlog in which the participants will be able to load real sonic data from Wireline and LWD sonic tools and QC the quality of the raw waveforms, as well as the maint products such as slowness projections and slownesses. Then, the user will be able to compute compressional, shear, and Stoneley slownesses from these waveforms using non-dispersive and dispersive slowness time coherence (STC) processing and dispersion analysis tools. Further, cross-dipole data will be used to conduct anisotropy analysis and derive standard answer products such as anisotropic parameters, fast shear azimuth. Finally, an overview of the different applications of sonic data for geomechanical applications, petrophysics, and geophysics is provided.