Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIP
<p>We investigate the pore space of rock samples with respect to different petrophysical parameters using various methods, which provide data on pore size distributions, including micro computed tomography (<i>μ</i>-CT), mercury intrusion porosimetry (MIP), nuclear magnetic reso...
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doaj-0ac8a7ff8dae4754a24cae65dc39da0a2020-11-25T01:54:58ZengCopernicus PublicationsSolid Earth1869-95101869-95292018-11-0191225123810.5194/se-9-1225-2018Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIPZ. Zhang0S. Kruschwitz1S. Kruschwitz2A. Weller3M. Halisch4Southwest Petroleum University, School of Geoscience and Technology, 610500 Chengdu, ChinaFederal Institute for Material Research and Testing (BAM), 12205 Berlin, GermanyTechnische Universität Berlin, Institute of Civil Engineering, 13355 Berlin, GermanyClausthal University of Technology, Institute of Geophysics, 38678 Clausthal-Zellerfeld, GermanyLeibniz Institute for Applied Geophysics (LIAG), 30655 Hannover, Germany<p>We investigate the pore space of rock samples with respect to different petrophysical parameters using various methods, which provide data on pore size distributions, including micro computed tomography (<i>μ</i>-CT), mercury intrusion porosimetry (MIP), nuclear magnetic resonance (NMR), and spectral-induced polarization (SIP). The resulting cumulative distributions of pore volume as a function of pore size are compared. Considering that the methods differ with regard to their limits of resolution, a multiple-length-scale characterization of the pore space is proposed, that is based on a combination of the results from all of these methods. The approach is demonstrated using samples of Bentheimer and Röttbacher sandstone. Additionally, we compare the potential of SIP to provide a pore size distribution with other commonly used methods (MIP, NMR). The limits of resolution of SIP depend on the usable frequency range (between 0.002 and 100 Hz). The methods with similar resolution show a similar behavior of the cumulative pore volume distribution in the overlapping pore size range. We assume that <i>μ</i>-CT and NMR provide the pore body size while MIP and SIP characterize the pore throat size. Our study shows that a good agreement between the pore radius distributions can only be achieved if the curves are adjusted considering the resolution and pore volume in the relevant range of pore radii. The MIP curve with the widest range in resolution should be used as reference.</p>https://www.solid-earth.net/9/1225/2018/se-9-1225-2018.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Z. Zhang S. Kruschwitz S. Kruschwitz A. Weller M. Halisch |
spellingShingle |
Z. Zhang S. Kruschwitz S. Kruschwitz A. Weller M. Halisch Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIP Solid Earth |
author_facet |
Z. Zhang S. Kruschwitz S. Kruschwitz A. Weller M. Halisch |
author_sort |
Z. Zhang |
title |
Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIP |
title_short |
Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIP |
title_full |
Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIP |
title_fullStr |
Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIP |
title_full_unstemmed |
Enhanced pore space analysis by use of <i>μ</i>-CT, MIP, NMR, and SIP |
title_sort |
enhanced pore space analysis by use of <i>μ</i>-ct, mip, nmr, and sip |
publisher |
Copernicus Publications |
series |
Solid Earth |
issn |
1869-9510 1869-9529 |
publishDate |
2018-11-01 |
description |
<p>We investigate the pore space of rock samples with respect to different
petrophysical parameters using various methods, which provide data on pore
size distributions, including micro computed tomography (<i>μ</i>-CT), mercury
intrusion porosimetry (MIP), nuclear magnetic resonance (NMR), and
spectral-induced polarization (SIP). The resulting cumulative distributions
of pore volume as a function of pore size are compared. Considering that the
methods differ with regard to their limits of resolution, a
multiple-length-scale characterization of the pore space is proposed, that is
based on a combination of the results from all of these methods. The approach
is demonstrated using samples of Bentheimer and Röttbacher sandstone.
Additionally, we compare the potential of SIP to provide a pore size
distribution with other commonly used methods (MIP, NMR). The limits of
resolution of SIP depend on the usable frequency range (between 0.002 and
100 Hz). The methods with similar resolution show a similar behavior of the
cumulative pore volume distribution in the overlapping pore size range. We
assume that <i>μ</i>-CT and NMR provide the pore body size while MIP and SIP
characterize the pore throat size. Our study shows that a good agreement
between the pore radius distributions can only be achieved if the curves are
adjusted considering the resolution and pore volume in the relevant range of
pore radii. The MIP curve with the widest range in resolution should be used
as reference.</p> |
url |
https://www.solid-earth.net/9/1225/2018/se-9-1225-2018.pdf |
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