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doi:10.2204/iodp.sp.348.2013 Logging/Downhole measurements strategyHole C0002FDuring drilling in Hole C0002F, LWD/MWD tools will be run between 860.3 and 3600 (or 4400) mbsf. Annular pressure while drilling, gamma ray, and resistivity logs will be collected in the 860.3–2300 mbsf section. The complete LWD string will be used below 2400 mbsf. This provides the ability to monitor drilling parameters and conditions and to collect gamma ray, sonic, and resistivity logs to define major lithologic changes in real time (MWD) as well as record high-resolution borehole and formation conditions (LWD). The MWD tool suite (Fig. F4) will include annular pressure while drilling, weight on bit, torque, azimuth, rate of penetration, hole inclination, and gamma radiation. The LWD tool suite will include laterolog resistivity at bit, azimuthal and sonic imaging (azimuthal focused resistivity), and compressional and shear sonic velocity and ultrasonic caliper (bimodal acoustic XBAT). LWD azimuthal resistivity data and borehole resistivity images will be obtained in order to further define stratigraphic boundaries and to characterize bedding, minor faults, and any wellbore breakouts or tensile fractures induced by drilling. |
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