E3S Web Conf.
Volume 146, 2020The 2019 International Symposium of the Society of Core Analysts (SCA 2019)
|Number of page(s)||9|
|Section||Improved SCAL Techniques and Interpretation|
|Published online||05 February 2020|
Two-Phase Fluid Flow Experiments Monitored by NMR
1 Leibniz Institute for Applied Geophysics, Hannover, Germany
2 SCK.CEN, Mol, Belgium
3 RWTH Aachen University, Aachen, Germany
4 Wintershall Holding GmbH, Barnstorf, Germany
* Corresponding author: NKlitzsch@eonerc.rwth-aachen.de
We present a newly developed high-pressure nuclear magnetic resonance (NMR) flow cell, which allows for the simultaneous determination of water saturation, effective gas permeability and NMR relaxation time distribution in two-phase fluid flow experiments. We introduce both the experimental setup and the experimental procedure on a tight Rotliegend sandstone sample. The initially fully water saturated sample is systematically drained by a stepwise increase of gas (Nitrogen) inlet pressure and the drainage process is continuously monitored by low field NMR relaxation measurements. After correction of the data for temperature fluctuations, the monitored changes in water saturation proved very accurate. The experimental procedure provides quantitative information about the total water saturation as well as about its distribution within the pore space at defined differential pressure conditions. Furthermore, the relationship between water saturation and relative (or effective) apparent permeability is directly determined.
© The Authors, published by EDP Sciences, 2020
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