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Investigating the relative permeability behavior of microporosity-rich carbonates and tight sandstones with multiscale pore network models

Tom Bultreys (UGent) , Jeroen Van Stappen (UGent) , Tim De Kock (UGent) , Wesley De Boever, Marijn Boone (UGent) , Luc Van Hoorebeke (UGent) and Veerle Cnudde (UGent)
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Abstract
The relative permeability behavior of rocks with wide ranges of pore sizes is in many cases still poorly understood, and is difficult to model at the pore scale. In this work, we investigate the capillary pressure and relative permeability behavior of three outcrop carbonates and two tight reservoir sandstones with wide, multi-modal pore size distributions. To examine how the drainage and imbibition properties of these complex rock types are influenced by the connectivity of macropores to each other and to zones with unresolved small-scale porosity, we apply a previously presented micro-computed-tomography-based multi-scale pore network model Bultreys et al. [2015b, 2016b] to these samples. The sensitivity to the properties of the small-scale porosity is studied by performing simulations with different artificial sphere-packing-based networks as a proxy for these pores. Finally, the mixed-wet water flooding behavior of the samples is investigated, assuming different wettability distributions for the micro-and macroporosity. While this work is not an attempt to perform predictive modeling, it seeks to qualitatively explain the behavior of the investigated samples and illustrates some of the most recent developments in multi-scale pore network modeling.
Keywords
relative permeability, micro-computed tomography, tight sandstone, Microporosity, Carbonate, pore network model, X-RAY MICROTOMOGRAPHY, MICRO-CT, COMPUTED-TOMOGRAPHY, HETEROGENEOUS ROCKS, POROUS-MEDIA, TRANSPORT, SCALE, RESERVOIRS, LIMESTONE, UGCT

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MLA
Bultreys, Tom et al. “Investigating the Relative Permeability Behavior of Microporosity-rich Carbonates and Tight Sandstones with Multiscale Pore Network Models.” JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121.11 (2016): 7929–7945. Print.
APA
Bultreys, T., Van Stappen, J., De Kock, T., De Boever, W., Boone, M., Van Hoorebeke, L., & Cnudde, V. (2016). Investigating the relative permeability behavior of microporosity-rich carbonates and tight sandstones with multiscale pore network models. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 121(11), 7929–7945.
Chicago author-date
Bultreys, Tom, Jeroen Van Stappen, Tim De Kock, Wesley De Boever, Marijn Boone, Luc Van Hoorebeke, and Veerle Cnudde. 2016. “Investigating the Relative Permeability Behavior of Microporosity-rich Carbonates and Tight Sandstones with Multiscale Pore Network Models.” Journal of Geophysical Research-solid Earth 121 (11): 7929–7945.
Chicago author-date (all authors)
Bultreys, Tom, Jeroen Van Stappen, Tim De Kock, Wesley De Boever, Marijn Boone, Luc Van Hoorebeke, and Veerle Cnudde. 2016. “Investigating the Relative Permeability Behavior of Microporosity-rich Carbonates and Tight Sandstones with Multiscale Pore Network Models.” Journal of Geophysical Research-solid Earth 121 (11): 7929–7945.
Vancouver
1.
Bultreys T, Van Stappen J, De Kock T, De Boever W, Boone M, Van Hoorebeke L, et al. Investigating the relative permeability behavior of microporosity-rich carbonates and tight sandstones with multiscale pore network models. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH. 2016;121(11):7929–45.
IEEE
[1]
T. Bultreys et al., “Investigating the relative permeability behavior of microporosity-rich carbonates and tight sandstones with multiscale pore network models,” JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, vol. 121, no. 11, pp. 7929–7945, 2016.
@article{8130797,
  abstract     = {The relative permeability behavior of rocks with wide ranges of pore sizes is in many cases still poorly understood, and is difficult to model at the pore scale. In this work, we investigate the capillary pressure and relative permeability behavior of three outcrop carbonates and two tight reservoir sandstones with wide, multi-modal pore size distributions. To examine how the drainage and imbibition properties of these complex rock types are influenced by the connectivity of macropores to each other and to zones with unresolved small-scale porosity, we apply a previously presented micro-computed-tomography-based multi-scale pore network model Bultreys et al. [2015b, 2016b] to these samples. The sensitivity to the properties of the small-scale porosity is studied by performing simulations with different artificial sphere-packing-based networks as a proxy for these pores. Finally, the mixed-wet water flooding behavior of the samples is investigated, assuming different wettability distributions for the micro-and macroporosity. While this work is not an attempt to perform predictive modeling, it seeks to qualitatively explain the behavior of the investigated samples and illustrates some of the most recent developments in multi-scale pore network modeling.},
  author       = {Bultreys, Tom and Van Stappen, Jeroen and De Kock, Tim and De Boever, Wesley and Boone, Marijn and Van Hoorebeke, Luc and Cnudde, Veerle},
  issn         = {2169-9313},
  journal      = {JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH},
  keywords     = {relative permeability,micro-computed tomography,tight sandstone,Microporosity,Carbonate,pore network model,X-RAY MICROTOMOGRAPHY,MICRO-CT,COMPUTED-TOMOGRAPHY,HETEROGENEOUS ROCKS,POROUS-MEDIA,TRANSPORT,SCALE,RESERVOIRS,LIMESTONE,UGCT},
  language     = {eng},
  number       = {11},
  pages        = {7929--7945},
  title        = {Investigating the relative permeability behavior of microporosity-rich carbonates and tight sandstones with multiscale pore network models},
  url          = {http://dx.doi.org/10.1002/2016JB013328},
  volume       = {121},
  year         = {2016},
}

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