Publicaties | Kaarten

nieuwe zoekopdracht

[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina
Logging-while-coring - new technology from the simultaneous recovery of downhole cores and geophysical measurements
Goldberg, D.; Myers, G.; Iturrino, G.; Grigar, K.; Pettigrew, T.; Mrozewski, S. (2006). Logging-while-coring - new technology from the simultaneous recovery of downhole cores and geophysical measurements, in: Rothwell, R.G. (Ed.) New techniques in sediment core analysis. Geological Society Special Publication, 267: pp. 219-228
In: Rothwell, R.G. (Ed.) (2006). New techniques in sediment core analysis. Geological Society Special Publication, 267. Geological Society: London. ISBN 1-86239-210-2. 266 pp. https://dx.doi.org/10.1144/GSL.SP.2006.267
In: Hartley, A.J. et al. (Ed.) Geological Society Special Publication. Geological Society of London: Oxford; London; Edinburgh; Boston, Mass.; Carlton, Vic.. ISSN 0305-8719; e-ISSN 2041-4927, meer
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Auteurs  Top 
  • Goldberg, D.
  • Myers, G.
  • Iturrino, G.
  • Grigar, K.
  • Pettigrew, T.
  • Mrozewski, S.
Abstract
    A newly developed logging-while-coring system was deployed during Ocean Drilling Program legs 204 and 209 off the coast of Oregon and near the Mid-Atlantic Ridge. The system consists of two existing devices modified to be used together - a Schlumberger Resistivity-at-the-Bit* tool, and a Texas A&M University wireline-retrieved core barrel and latching tool. The combination allows for precise core-log depth calibration and core orientation within a single borehole, and without a pipe trip. These tests, conducted in clay-bearing sediments (Leg 204) and in crustal peridotite and gabbroic rocks (Leg 209), mark the first simultaneous use of coring and logging-while-drilling technologies. Sediment cores were recovered with 33% recovery, on average, and as high as 68% to 75 m depth below the sea floor. Core recovery in crustal rocks was only 1-2%, however, penetrating to 21 m depth below sea floor, which is attributed to a problem with the core catcher. High-resolution logs were recorded in the downhole tool memory over the entire drilled intervals at both test sites. It is anticipated that logging-while-coring systems will be utilized more routinely where rig time constraints may otherwise preclude coring in difficult drilling environments.
Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ.