Borehole geophysics

Logging data acquisition

• Hess Deep, ODP Leg 147, Site 894 (Shipboard Scientific Party, 1993 a, b)
• Woodlark basin, ODP Leg 180, Sites 1108, 1109, 1114, 1115, 1118 ( Leg 180 logging summary and Shipboard Scientific Party, 1999 a, b, c, e, f, i )
• Corinth Rift Laboratory, Trizonia Island, Hole Tri5 (DGLab, 2003)
• Alpine Fault, New Zealand, Deep Fault Drilling Programme, Site DFDP-2 (Sutherland et al, 2015)
• Oman Drilling Project (Kelemen et al, 2020)

Analysis

• Structural analysis of Formation MicroScanner (FMS) image logs: fracturation (MacLeod et al., 1995; Célérier et al., 1996; 2000; De Larouzière et al., 1999; Louvel et al., 2002) and sedimentary structures (Célérier et al., 2002) .
• Borehole wall geometry from Formation MicroScanner oriented calipers (Célérier et al., 1996) or BoreHole TeleViewer travel time (Célérier et al., 2000).
• Core structural analysis (bedding and/or fracture orientations): hard rocks of Hess Deep (Shipboard Scientific Party, 1993 a, b, c; MacLeod et al., 1995; 1996b) and soft rocks of Woodlark Basin (Shipboard Scientific Party, 1999a, b, c, d, e, f, g, h, i).
• Core log integration: Hess Deep (MacLeod et al., 1995; 1996a) and Woodlark Basin (Célérier et al., 2002, Louvel et al., 2002).

Software development

• WellWall : reconstruction of borehole wall geometry from oriented calipers logs, and identification of potential intervals of break-out, washout, or key seat.
• StressPoly : draws principal stress magnitudes polygons.
• App2truedip : true dip calculation from two apparent dips measured on cores.
• App2truedipG : true dip calculation from two apparent dips measured on cores, with additional graphic outputs adapted to ODP/IODP visual core description.

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