The legacy of logging; highlights of downhole measurements and their use in scientific ocean drilling

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Author(s): Morgan, Sally; Slagle, Angela
Members of International Logging Consortium
Author Affiliation(s): Primary:
University of Leicester, International Ocean Discovery Program, Leicester, United Kingdom
Lamont-Doherty Earth Observatory, United States
Volume Title: European Geosciences Union general assembly 2018
Source: Geophysical Research Abstracts, Vol.20; European Geosciences Union general assembly 2018, Vienna, Austria, April 8-13, 2018. Publisher: Copernicus GmbH on behalf of the European Geosciences Union (EGU), Katlenburg-Lindau, Germany. ISSN: 1029-7006
Note: In English
Summary: Since the earliest scientific ocean drilling, downhole logging has played an important role in helping the International Ocean Discovery Program (IODP-II) and its predecessors (Deep Sea Drilling Project (DSDP), Ocean Drilling Program (ODP) and Integrated Ocean Drilling Program (IODP-I)) address high level scientific questions. While the program largely centers on the acquisition of physical core material, downhole logging allows the collection of continuous, in situ physical properties datasets that both complement and validate corresponding core-based measurements. In cases where core recovery is discontinuous, downhole measurements provide the only means to assemble a complete record, providing a basis for inference of any missing lithostratigraphy. Measurements acquired downhole are taken under in situ temperature and pressure conditions and consequently provide better estimates of true formation properties than the associated core measurements acquired under surface conditions. In addition, downhole logging data provide an essential dataset that is intermediate in scale, bridging the gap between mm-scale measurements on cores and 10s meters to km-scale regional seismic datasets. This presentation will feature downhole logging highlights from the scientific ocean drilling archive of the last 50 years, not only demonstrating the different conveyancing methods used across the IODP platforms, but also the many and varied applications of the in situ measurements acquired. These will include examples of: novel uses of standard oilfield logging technologies; engineering developments driven by scientific needs; and milestone projects. [Copyright Author(s) 2018. CC Attribution 4.0 License:]
Year of Publication: 2018
Research Program: DSDP Deep Sea Drilling Project
IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 30 Engineering Geology; Cores; Deep Sea Drilling Project; Integrated Ocean Drilling Program; International Ocean Discovery Program; International cooperation; Marine sediments; Ocean Drilling Program; Programs; Sediments
Record ID: 2019066732
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from European Geosciences Union, Munich, Germany

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