Tudge, Joanne et al. (2013): Site C0011 LWD resistivity-derived porosity

Leg/Site/Hole:
IODP 319 C0011
IODP 322 C0011
IODP 333 C0011
Identifier:
2013-047936
georefid
10.2204/iodp.proc.322.201.2013
doi
Creator:
Tudge, Joanne
University of Wisconsin-Madison, Department of Geosciences, Madison, WI, United States
author
Lovell, Mike
Japan Agency for Marine-Earth Science and Technology, Japan
author
Davis, Sarah
Tohoku University, Japan
author
Identification:
Site C0011 LWD resistivity-derived porosity
2013
In: Underwood, Michael B., Saito, Saneatsu, Kubo, Yu'suke, Sanada, Yoshinori, Chiyonobu, Shun, Destrigneville, Christine, Dugan, Brandon, Govil, Pawan, Hamada, Yohei, Heuer, Verena, Huepers, Andre, Ikari, Matt, Kitamura, Yujin, Kutterolf, Steffen, Labanieh, Shasa, Moreau, John, Naruse, Hajime, Oda, Hirokuni, Park, Jin-Oh, Pickering, Kevin T., Scudder, Rachel, Slagle, Angela, Spinelli, Glenn, Torres, Marta E., Tudge, Joanne, Wu Huaichun, Yamamoto, Tomohiro, Yamamoto, Yuzuru, Zhao, Xixi, Proceedings of the Integrated Ocean Drilling Program; NanTroSEIZE Stage 2; subduction inputs; Expedition 322 of the riser drilling platform, Yokkaichi, Japan, to Shingu, Japan, Sites C0011 and C0012, 1 September-10 October 2009
IODP Management International, Washington, DC, United States
322
During Integrated Ocean Drilling Program (IODP) Expedition 322 for the Nankai Trough Seismogenic Zone Experiment project, no logging-while-drilling (LWD)-based porosity measurements were acquired at Site C0011. Here we calculate porosity from both the ring and bit resistivity measurements. Core-derived thermal conductivity coefficients are used to estimate constant thermal gradients and variable thermal gradients for the different lithologies encountered. Temperature profiles are then generated based on the calculated thermal gradients to estimate water resistivity. Using the temperature-corrected water resistivity in Archie's equation, porosity is calculated from the two LWD resistivity measurements. When compared to core-based porosity measurements, the ring resistivity-derived porosity, with a constant thermal gradient of 91.3 degrees C/km, provides the more accurate estimate of porosity.
English
Serial
Coverage:Geographic coordinates:
North:32.4945
West:136.5254East: 136.5256
South:32.4944
Oceanography; Applied geophysics; Archie's law; boreholes; cores; electrical methods; geophysical methods; heat flow; Integrated Ocean Drilling Program; IODP Site C0011; marine sediments; NanTroSEIZE; North Pacific; Northwest Pacific; Pacific Ocean; porosity; resistivity; sedimentary rocks; sediments; Shikoku Basin; temperature; thermal conductivity; well logs; West Pacific;
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