Figure 7. Top: Hole short-axis direction presented against hole deviation (gray) derived from the orientation module of the FMS sensor. The black dots indicate hole sections with caliper-reading differences larger than 0.8 in. The continuous trace of open squares is pointing in the borehole azimuth direction plus 90°. In the case of hole elongation caused by pipe wear, this continuous trace and the dots should align. Bottom: Histogram of hole short-axis azimuth, with two maxima pointing N140° for upper basement schists, and N035° for lower basement gneisses.

Figure 7. Top: Hole short-axis direction presented against hole deviation (gray) derived from the orientation module of the FMS sensor. The black dots indicate hole sections with caliper-reading differences larger than 0.8 in. The continuous trace of open squares is pointing in the borehole azimuth direction plus 90°. In the case of hole elongation caused by pipe wear, this continuous trace and the dots should align. Bottom: Histogram of hole short-axis azimuth, with two maxima pointing N140° for upper basement schists, and N035° for lower basement gneisses.