Pore-scale visualization on a depressurization-induced CO2 exsolution

Xu, Ruina; Li, Rong; Huang, Feng; Jiang, Pei

doi:10.1016/j.scib.2017.04.023

Cited by 26 publications

(22 citation statements)

References 39 publications

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“…When a geological formation is subjected to depressurization, exsolution of CO 2 from the CO 2 -saturated brine can occur. 47,128,[178][179][180][181] This phenomenon was also observed in the case of micromodels experiments 182 (Fig. 17(a)).…”

Section: Please Do Not Adjust Marginssupporting

confidence: 64%

Studying key processes related to CO₂ underground storage at the pore scale using high pressure micromodels

et al. 2020

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Section: Please Do Not Adjust Marginssupporting

confidence: 64%

Studying key processes related to CO₂ underground storage at the pore scale using high pressure micromodels

et al. 2020

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“…() and Xu et al . () for carbon dioxide exsolution raise important questions with regard to the role of the pore size and structure as well as the pressure depletion rate on the size and distribution of gas bubbles nucleating in the pore space. The process of gas exsolution is more complex than anticipated and an improved understanding thereof could not only have interesting implications for improving the understanding of the WIGED (Tisato et al .…”

Section: Discussionmentioning

confidence: 99%

“…Also, it is not clear how to reconcile a bubble diameter of 18 μm used as a fitting parameter in the interpretation of Tisato et al (2015) given that the pore size of sample GL2 is only ß5 μm. Observations made by Zuo et al (2017) and Xu et al (2017) for carbon dioxide exsolution raise important questions with regard to the role of the pore size and structure as well as the pressure depletion rate on the size and distribution of gas bubbles nucleating in the pore space. The process of gas exsolution is more complex than anticipated and an improved understanding thereof could not only have interesting implications for improving the understanding of the WIGED (Tisato et al 2015) and patchy saturation mechanisms Pride 2007, 2011;Müller, Toms-Stewart and Wenzlau 2008), but also for better constraining effects of trapped gas bubbles on the hydraulic conductivity of a porous medium.…”

Section: Wiged: Homogenous Distribution Of Pore-scale Bubblesmentioning

confidence: 99%

Laboratory measurements of seismic attenuation and Young's modulus dispersion in a partially and fully water‐saturated porous sample made of sintered borosilicate glass

Chapman

Quintal

Holliger

et al. 2018

Geophysical Prospecting

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We measured the extensional‐mode attenuation and Young's modulus in a porous sample made of sintered borosilicate glass at microseismic to seismic frequencies (0.05–50 Hz) using the forced oscillation method. Partial saturation was achieved by water imbibition, varying the water saturation from an initial dry state up to ∼99%, and by gas exsolution from an initially fully water‐saturated state down to ∼99%. During forced oscillations of the sample effective stresses up to 10 MPa were applied. We observe frequency‐dependent attenuation, with a peak at 1–5 Hz, for ∼99% water saturation achieved both by imbibition and by gas exsolution. The magnitude of this attenuation peak is consistently reduced with increasing fluid pressure and is largely insensitive to changes in effective stress. Similar observations have recently been attributed to wave‐induced gas exsolution–dissolution. At full water saturation, the left‐hand side of an attenuation curve, with a peak beyond the highest measured frequency, is observed at 3 MPa effective stress, while at 10 MPa effective stress the measured attenuation is negligible. This observation is consistent with wave‐induced fluid flow associated with mesoscopic compressibility contrasts in the sample's frame. These variations in compressibility could be due to fractures and/or compaction bands that formed between separate sets of forced‐oscillation experiments in response to the applied stresses. The agreement of the measured frequency‐dependent attenuation and Young's modulus with the Kramers–Kronig relations and additional data analyses indicate the good quality of the measurements. Our observations point to the complex interplay between structural and fluid heterogeneities on the measured seismic attenuation and they illustrate how these heterogeneities can facilitate the dominance of one attenuation mechanism over another.

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“…Other water-soluble dyes have also been used in CCS-related studies. Zuo et al (2013) used fluorescein and Xu et al (2017) used rhodamine B to study depressurization-induced exsolution of CO 2 from water in micromodels. Buchgraber et al (2012) used a general-purpose UV dye to study residual and capillary trapping of CO 2 during drainage and imbibition processes in a micromodel.…”

Section: Co 2 Sequestrationmentioning

confidence: 99%

Microfluidics for Porous Systems: Fabrication, Microscopy and Applications

et al. 2018

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No matter how sophisticated the structures are and on what length scale the pore sizes are, fluid displacement in porous media can be visualized, captured, mimicked and optimized using microfluidics. Visualizing transport processes is fundamental to our understanding of complex hydrogeological systems, petroleum production, medical science applications and other engineering applications. Microfluidics is an ideal tool for visual observation of flow at high temporal and spatial resolution. Experiments are typically fast, as sample volume is substantially low with the use of miniaturized devices. This review first discusses the fabrication techniques for generating microfluidics devices, experimental setups and new advances in microfluidic fabrication using three-dimensional printing, geomaterials and biomaterials. We then address multiphase transport in subsurface porous media, with an emphasis on hydrology and petroleum engineering applications in the past few decades. We also cover the application of microfluidics to study membrane systems in biomedical science and particle sorting. Lastly, we explore how synergies across different disciplines can lead to innovations in this field. A number of problems that have been resolved, topics that are under investigation and cutting-edge applications that are emerging are highlighted. Keywords Microfluidics • Porous media • Flow visualization • On-a-chip applications • Lab-on-a-chip • Micromodels Alireza Gerami and Yara Alzahid have contributed equally to this manuscript.

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Pore-scale visualization on a depressurization-induced CO2 exsolution

Cited by 26 publications

References 39 publications

Studying key processes related to CO₂ underground storage at the pore scale using high pressure micromodels

Studying key processes related to CO₂ underground storage at the pore scale using high pressure micromodels

Laboratory measurements of seismic attenuation and Young's modulus dispersion in a partially and fully water‐saturated porous sample made of sintered borosilicate glass

Microfluidics for Porous Systems: Fabrication, Microscopy and Applications

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Pore-scale visualization on a depressurization-induced CO2 exsolution

Cited by 26 publications

References 39 publications

Studying key processes related to CO2 underground storage at the pore scale using high pressure micromodels

Studying key processes related to CO2 underground storage at the pore scale using high pressure micromodels

Laboratory measurements of seismic attenuation and Young's modulus dispersion in a partially and fully water‐saturated porous sample made of sintered borosilicate glass

Microfluidics for Porous Systems: Fabrication, Microscopy and Applications

Contact Info

Product

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Studying key processes related to CO₂ underground storage at the pore scale using high pressure micromodels

Studying key processes related to CO₂ underground storage at the pore scale using high pressure micromodels