2019
DOI: 10.1029/2018jb016103
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Tracer‐Guided Characterization of Dominant Pore Networks and Implications for Permeability and Wettability in Shale

Abstract: Pore network characterization is an important aspect in unconventional reservoir evaluation. While application of the technique of scanning electron microscope (SEM) brings substantial advances in pore characterization in shale, understanding the connected pore network that dominates flow in shale samples is limited by using SEM alone because of small fields of view and lack of views of connectivity in 3D. In this research, a technique integrating tracer imbibition, micro‐computed tomography (CT) imaging, and … Show more

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Cited by 10 publications
(2 citation statements)
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“…However, it is still debatable to conclude, for unconventional rocks that have a very complex pore structure, whether a single average surface CA or even CA hysteresis can be representative of in situ pore-scale CAs. Hence, as is being increasingly realized (Peng et al, 2019;Siddiqui et al, 2018), SI seems more likely to be representative of fluid behavior in a rock as it considers the pore-scale mineral heterogeneity, pore morphology, and any clay mineral effects. In lieu of this, more advanced techniques such as SI combined with imaged in situ pore-scale CAs are gaining prominence (Alhammadi et al, 2017;AlRatrout et al, 2018), which give newer pore-scale insights.…”
Section: Discrepancies Between Wettability Estimated By Cas and Simentioning
confidence: 99%
“…However, it is still debatable to conclude, for unconventional rocks that have a very complex pore structure, whether a single average surface CA or even CA hysteresis can be representative of in situ pore-scale CAs. Hence, as is being increasingly realized (Peng et al, 2019;Siddiqui et al, 2018), SI seems more likely to be representative of fluid behavior in a rock as it considers the pore-scale mineral heterogeneity, pore morphology, and any clay mineral effects. In lieu of this, more advanced techniques such as SI combined with imaged in situ pore-scale CAs are gaining prominence (Alhammadi et al, 2017;AlRatrout et al, 2018), which give newer pore-scale insights.…”
Section: Discrepancies Between Wettability Estimated By Cas and Simentioning
confidence: 99%
“…This underscores the direct influence of microscale wettability distribution on contact angle measurements and the limited representativeness of this method. Nevertheless, other methods, such as the Amott wettability index, USBM method, and spontaneous imbibition, face challenges in accurately characterizing neutral wettability, being influenced by pore-throat structures, surface roughness, and the fact that they are complex and time-consuming [20,26,[32][33][34][35][36]. Nevertheless, nuclear magnetic resonance only allows for the analysis of wettability variations between pore-throat channels of different diameters [20,[36][37][38].…”
Section: Introductionmentioning
confidence: 99%