Thermodynamics phase changes of nanopore fluids

Islam, Akand W.; Patzek, Tadeusz W; Sun, Alexander Y.

doi:10.1016/j.jngse.2015.04.035

Cited by 74 publications

(34 citation statements)

References 36 publications

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“…Singh's results were subsequently used to investigate the influence of molecular weight on the critical properties of confined single-component hydrocarbons [56] and the specific changes in phase behavior and critical properties of different hydrocarbon mixtures in the nanospaces [62,63]. Later, Islam et al [64] compared the difference in confined phase behavior description within Peng-Robinson EOS and the vdW based on a new proposed correlation. The prediction results of this new relationship are in good agreement with experiments and molecular simulation in the whole range of pore sizes from the scale of single molecule (σ LJ /r p ≤ 0:5) to the bulk spaces.…”

Section: Tindy Andmentioning

confidence: 99%

CO2-Fluid-Rock Interactions and the Coupled Geomechanical Response during CCUS Processes in Unconventional Reservoirs

Cai

et al. 2021

Geofluids

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The difficulty of deploying remaining oil from unconventional reservoirs and the increasing CO2 emissions has prompted researchers to delve into carbon emissions through Carbon Capture, Utilization, and Storage (CCUS) technologies. Under the confinement of nanopore in unconventional formation, CO2 and hydrocarbon molecules show different density distribution from in the bulk phase, which leads to a unique phase state and interface behavior that affects fluid migration. At the same time, mineral reactions, asphaltene deposition, and CO2 pressurization will cause the change of porous media geometry, which will affect the multiphase flow. This review highlights the physical and chemical effects of CO2 injection into unconventional reservoirs containing a large number of micro-nanopores. The interactions between CO2 and in situ fluids and the resulting unique fluid phase behavior, gas-liquid equilibrium calculation, CO2 adsorption/desorption, interfacial tension, and minimum miscible pressure (MMP) are reviewed. The pore structure changes and stress distribution caused by the interactions between CO2, in situ fluids, and rock surface are discussed. The experimental and theoretical approaches of these fluid-fluid and fluid-solid reactions are summarized. Besides, deficiencies in the application and safety assessment of CCUS in unconventional reservoirs are described, which will help improve the design and operation of CCUS.

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Section: Tindy Andmentioning

confidence: 99%

CO2-Fluid-Rock Interactions and the Coupled Geomechanical Response during CCUS Processes in Unconventional Reservoirs

Cai

et al. 2021

Geofluids

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“…These data should only be considered as tentative guidelines, as it is known that confinement in pores alters the thermodynamic properties of fluids [37][38][39][40]. In particular, extended Peng-Robinson equations of state have been used to predict fluid behaviour in cylindrical and slit pores [41][42][43].…”

Section: Simulation Set Upmentioning

confidence: 99%

Competitive adsorption and reduced mobility: N-octane, CO₂ and H₂S in alumina and graphite pores

et al. 2020

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Because gas injection into geological formations is a common technology deployed for enhanced oil recovery (EOR), it is important to understand at the molecular level the relations between competitive adsorption and fluid mobility at the single-pore level. To achieve such an understanding, we report here molecular dynamics simulation results to document structural and dynamical properties of n-octane confined in slit-shaped alumina and graphite pores in the presence of CO 2 or H 2 S. The substrates are chosen as proxy models for natural hydrophilic and hydrophobic substrates, respectively. It was found that CO 2 and H 2 S could displace n-octane from alumina but not from graphite surfaces. Analysis of the results demonstrates that more attractive n-octane -surface and weaker CO 2 /H 2 S -surface interactions in graphite compared to alumina are responsible for this observation. Regardless of pore type, the results suggest that adding CO 2 or H 2 S suppresses the diffusion of n-octane due to pore crowding. However, the mechanisms responsible for this observation are different, wherein preferential adsorption sites are available on the alumina surface for both CO 2 and H 2 S, but not on graphite. To contribute to designing advanced EOR technologies, possible molecular mechanisms are proposed to interpret the results.

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“…Other areas that have recently caught interest due to their importance in understanding the fluid behavior in shale or increasing the productivity are (i) spontaneous imbibition in shales [218,[223][224][225], (ii) thermodynamic phase behavior of fluids inside shales as a function of pressure drawdown during production [226][227][228][229][230][231], (iii) alternate fracturing fluids [232][233][234][235][236][237] for better reservoir stimulation and to avoid water usage, and (iv) enhancing oil recovery by injection of fluids [238][239][240].…”

Section: Literature Reviewmentioning

confidence: 99%

Critical Review of Fluid Flow Physics at Micro‐ to Nano‐scale Porous Media Applications in the Energy Sector

Singh

Myong

2018

Advances in Materials Science and Engineering

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While there is a consensus in the literature that embracing nanodevices and nanomaterials helps in improving the efficiency and performance, the reason for the better performance is mostly subscribed to the nanosized material/structure of the system without sufficiently acknowledging the role of fluid flow mechanisms in these systems. This is evident from the literature review of fluid flow modeling in various energy-related applications, which reveals that the fundamental understanding of fluid transport at micro- and nanoscale is not adequately adapted in models. Incomplete or insufficient physics for the fluid flow can lead to untapped potential of these applications that can be used to increase their performance. This paper reviews the current state of research for the physics of gas and liquid flow at micro- and nanoscale and identified critical gaps to improve fluid flow modeling in four different applications related to the energy sector. The review for gas flow focuses on fundamentals of gas flow at rarefied conditions, the velocity slip, and temperature jump conditions. The review for liquid flow provides fundamental flow regimes of liquid flow, and liquid slip models as a function of key modeling parameters. The four porous media applications from energy sector considered in this review are (i) electrokinetic energy conversion devices, (ii) membrane-based water desalination through reverse osmosis, (iii) shale reservoirs, and (iv) hydrogen storage, respectively. Review of fluid flow modeling literature from these applications reveals that further improvements can be made by (i) modeling slip length as a function of key parameters, (ii) coupling the dependency of wettability and slip, (iii) using a reservoir-on-chip approach that can enable capturing the subcontinuum effects contributing to fluid flow in shale reservoirs, and (iv) including Knudsen diffusion and slip in the governing equations of hydrogen gas storage.

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Thermodynamics phase changes of nanopore fluids

Cited by 74 publications

References 36 publications

CO2-Fluid-Rock Interactions and the Coupled Geomechanical Response during CCUS Processes in Unconventional Reservoirs

CO2-Fluid-Rock Interactions and the Coupled Geomechanical Response during CCUS Processes in Unconventional Reservoirs

Competitive adsorption and reduced mobility: N-octane, CO₂ and H₂S in alumina and graphite pores

Critical Review of Fluid Flow Physics at Micro‐ to Nano‐scale Porous Media Applications in the Energy Sector

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Thermodynamics phase changes of nanopore fluids

Cited by 74 publications

References 36 publications

CO2-Fluid-Rock Interactions and the Coupled Geomechanical Response during CCUS Processes in Unconventional Reservoirs

CO2-Fluid-Rock Interactions and the Coupled Geomechanical Response during CCUS Processes in Unconventional Reservoirs

Competitive adsorption and reduced mobility: N-octane, CO2 and H2S in alumina and graphite pores

Critical Review of Fluid Flow Physics at Micro‐ to Nano‐scale Porous Media Applications in the Energy Sector

Contact Info

Product

Resources

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Competitive adsorption and reduced mobility: N-octane, CO₂ and H₂S in alumina and graphite pores