Figure F16. Schematic diagram of Schlumberger (A) FMS with four pads, 16 buttons each pad, covering 25%-40% of hole diameter (8B) Fullbore Formation MicroImager (FM) with four pads and 24 buttons on each pad. The hinged flap is able to increase coverage of up to 80% (redrawn from Ekstrom et al., 1987; Schlumberger, 1994b). The individual buttons are aligned in two rows; processes for depth corrections shift the recorded resistivity to one row. Each button consists of an electrode surrounded by an insulation.

Figure F16. Schematic diagram of Schlumberger (A) FMS with four pads, 16 buttons each pad, covering 25%-40% of hole diameter (B) Fullbore Formation MicroImager (FM) with four pads and 24 buttons on each pad. The hinged flap is able to increase coverage of up to 80% (redrawn from Ekstrom et al., 1987; Schlumberger, 1994b). The individual buttons are aligned in two rows; processes for depth corrections shift the recorded resistivity to one row. Each button consists of an electrode surrounded by an insulation.