Previous   |   Close   |   Next

Figure F67. Summary of logs recorded by the Formation MicroScanner (FMS)-sonic tool string in Hole U1351B. Hole size was calculated by the two orthogonal calipers of the FMS (C1 and C2). In the gamma ray track, gamma ray recorded in Pass 2 with the FMS-sonic tool string is compared to gamma recorded with the triple combination (TC) tool string in the same hole. Sonic waveform (WF) amplitude is shown as an indicator of the quality of the data. High waveform coherence, shown in red in the two velocity tracks, is a measure of the reliability of the slowness/time coherence algorithm used to derive compressional (VP) and shear (VS) velocities from the monopole and lower dipole sonic waveforms, respectively.

Previous   |   Close   |   Next  |  Top of page