Ocean Drilling Program. V. Logging for the Ocean Drilling Program; Results From the First Two Legs

摘要

All wells drilled by the Ocean Drilling Program which penetrate more than 400 meters of sediment, and any wells with significant basement penetration, are now logged as part of routine operations on the JOIDES Resolution. Standard logs include resistivity, sonic velocity, neutron porosity, density, and both natural and induced gamma-ray spectrometry. Speciality logs include an acoustic borehole televiewer and a 12-channel full waveform sonic tool. During the first two ODP legs, logs were obtained in shallow water carbonates and evaporites of the southern Blake Plateau, and in 110-Ma basalts of Oceanic Layer 2 in the western Atlantic. The results demonstrate the importance of high quality physical properties measurements recorded in situ to augment information obtained from the recovered core. (Author)