HR: 1340h
AN: H33A-0455    [Abstracts]
TI: Quantification of three-phase fluid distribution in a porous medium by X-ray transmission measurements with energy dispersion X-ray spectrometry
AU: * Tokunaga, T
EM: tokunaga@geosys.t.u-tokyo.ac.jp
AF: Department of Geosystem Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656 Japan
AU: Watanabe, T
EM: tt36510@mail.ecc.u-tokyo.ac.jp
AF: Department of Geosystem Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656 Japan
AU: Kodama, Y
EM: y-kodama@rigaku.co.jp
AF: Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima, Tokyo, 196-8666 Japan
AU: Kuribayashi, M
EM: kuribaya@rigaku.co.jp
AF: Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima, Tokyo, 196-8666 Japan
AB: A new X-ray transmission measurement with dispersion X-ray spectrometry was developed to quantify three-phase fluid distribution in a porous medium. Here, distilled water doped with 5.0 % barium chloride and oil doped with 7.0 % iodoheptane were used for the experiments. We measured the X-ray transmission intensities through a porous medium with energy dispersion X-ray spectrometry and quantified the spatial distribution of each phase (water, oil, and air) fluid in the medium by using intensities at two appropriate frequency bands. The used bands for the analysis were several kilo-electron volts higher from the absorption edges of barium and iodine, respectively. We first measured the amount of each fluid with known fluid contents and confirmed the applicability of this technique. Then, the technique was applied to quantify the spatially distributed three-phase fluid contents. As a result, we were able to quantify three-phase fluid distribution in the porous medium with sufficient accuracy. However, the measurement time was rather long for applying this method to capture the fluid movement in a porous medium. In this presentation, we suggest the possibility to quantify temporal change of three-dimensional distribution of three-phase fluids in a porous medium by applying energy dispersion X-ray spectrometry to the traditional CT technique.
DE: 1894 Instruments and techniques
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting