Experimental studies of CO2 and CH4 diffusion coefficient in bulk oil and porous media

Unatrakarn, Datchawan; Asghari, Koorosh; Cóndor, José

doi:10.1016/j.egypro.2011.02.103

Cited by 47 publications

(24 citation statements)

References 7 publications

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“…The pressure decay method was applied to measure the diffusion coefficient. Unatrakarn et al used a similar technique to measure the CH 4 and CO 2 diffusion coefficients in porous media and bulk oil phase at pressures up to 3.2 MPa [23]. Li and Dong proposed both experimental and mathematical methods to determine the CO 2 diffusion coefficient in oil-saturated Berea cores [24].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the supercritical CO ₂ diffusion coefficient in porous media under reservoir conditions

Chi

Zhao

et al. 2019

R. Soc. open sci.

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Reliable measurement of the CO 2 diffusion coefficient in consolidated oil-saturated porous media is critical for the design and performance of CO 2 -enhanced oil recovery (EOR) and carbon capture and storage (CCS) projects. A thorough experimental investigation of the supercritical CO 2 diffusion in n -decane-saturated Berea cores with permeabilities of 50 and 100 mD was conducted in this study at elevated pressure (10–25 MPa) and temperature (333.15–373.15 K), which simulated actual reservoir conditions. The supercritical CO 2 diffusion coefficients in the Berea cores were calculated by a model appropriate for diffusion in porous media based on Fick's Law. The results show that the supercritical CO 2 diffusion coefficient increases as the pressure, temperature and permeability increase. The supercritical CO 2 diffusion coefficient first increases slowly at 10 MPa and then grows significantly with increasing pressure. The impact of the pressure decreases at elevated temperature. The effect of permeability remains steady despite the temperature change during the experiments. The effect of gas state and porous media on the supercritical CO 2 diffusion coefficient was further discussed by comparing the results of this study with previous study. Based on the experimental results, an empirical correlation for supercritical CO 2 diffusion coefficient in n -decane-saturated porous media was developed. The experimental results contribute to the study of supercritical CO 2 diffusion in compact porous media.

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Section: Introductionmentioning

confidence: 99%

Experimental study of the supercritical CO ₂ diffusion coefficient in porous media under reservoir conditions

Chi

Zhao

et al. 2019

R. Soc. open sci.

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“…neglecting swelling of heavy oil and constant gas compressibility factor), they require computational expertise as various numerical optimization algorithms are needed. Diverse works are in this category and one numerical procedure cannot be deemed better than another …”

Section: Introductionmentioning

confidence: 99%

Estimation of concentration‐dependent diffusion coefficients of gases in heavy oils/bitumen using experimental pressure‐decay data

Roman

Hejazi

2016

Can J Chem Eng

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The diffusion coefficient (D) of gases in heavy oils is an important mass transfer parameter to model and design gas injection processes for oil recovery. The pressure‐decay technique (PDT) is one of the widely used experimental methods available to infer this coefficient. PDT records the declining gas phase pressure resulting from the diffusion of gas into heavy oil inside a pressure/volume/temperature (PVT) cell. Commonly, the gas phase pressure decay is modelled by use of Fick's second law along with gas‐phase mass balance equations and assuming a constant diffusion coefficient. In this work, we evaluate two concentration‐dependent diffusion coefficient functions, power‐law and exponential. A simple history matching technique is used to estimate the apparent diffusion coefficient (Do) and concentration dependency factor (ma) from pressure‐decay data. Extensive application of our method to experimental pressure‐decay tests shows that in addition to constant diffusion coefficients, both power‐law and exponential functions are capable of predicting the experimental data. This implies that other experimental techniques are required to extract the functionality of diffusion coefficients with gas concentrations in heavy oil.

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“…In one-dimensional diffusion, the mass diffusion coefficient could be considered constant because of the relatively small variation of the mass diffusion coefficient in an isothermal free diffusion process. Therefore, applying Fick’s law, the diffusion process can be expressed as (Unatrakarn et al , 2011; Gholami et al , 2015): where c(z, t) is the concentration of the diffusant in liquid, mol · m −3 ; z is the axis of diffusion, m; t is the diffusion time, s; v is the velocity of the liquid, m · s −1 ; D is the mass diffusion coefficient, m 2 · s −1 .…”

Section: Measurement Theorymentioning

confidence: 99%

Digital holography interferometry for measuring the mass diffusion coefficients of N₂ in RP-3 and RP-5 jet fuels

Feng

Peng

et al. 2019

AEAT

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Purpose The purpose of this study is to measure the mass diffusion coefficient of nitrogen in jet fuel using digital holography interferometry for cost-effective designing and modeling of the aircraft tank inerting system. Design/methodology/approach The mass diffusion coefficients of N2 in RP-3 and RP-5 jet fuels were measured by digital holography interferometry at temperatures ranging from 278.15 to 343.15 K. The Arrhenius equation is used to adequately describe the relationship between mass diffusion coefficients and temperature. The viscosities of RP-3 and RP-5 jet fuels were also measured to examine the accuracy of the Stokes–Einstein model in calculating mass diffusion coefficients. Findings As temperature increases from 278.15 to 343.15 K, the mass diffusion coefficients increase 4.23-fold for N2 in RP-3 jet fuel and 5.13-fold for N2 in RP-5 jet fuel. The value of Dµ/T is not constant as the Stokes–Einstein equation expressed, but is a weak linear function of temperature. Practical implications A more accurate diffusion model is proposed by fitting the measured Dµ/T with the temperature and calculating the mass diffusion coefficients of N2 in RP-3 and RP-5 jet fuels within 10 per cent relative deviation. Originality/value A measurement system for mass diffusion coefficients of N2 in RP-3 and RP-5 jet fuels was constructed based on the digital holography interferometry. The mass diffusion coefficient can be expressed by a uniform polynomial function of temperature and viscosity.

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Experimental studies of CO2 and CH4 diffusion coefficient in bulk oil and porous media

Cited by 47 publications

References 7 publications

Experimental study of the supercritical CO ₂ diffusion coefficient in porous media under reservoir conditions

Experimental study of the supercritical CO ₂ diffusion coefficient in porous media under reservoir conditions

Estimation of concentration‐dependent diffusion coefficients of gases in heavy oils/bitumen using experimental pressure‐decay data

Digital holography interferometry for measuring the mass diffusion coefficients of N₂ in RP-3 and RP-5 jet fuels

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Experimental studies of CO2 and CH4 diffusion coefficient in bulk oil and porous media

Cited by 47 publications

References 7 publications

Experimental study of the supercritical CO 2 diffusion coefficient in porous media under reservoir conditions

Experimental study of the supercritical CO 2 diffusion coefficient in porous media under reservoir conditions

Estimation of concentration‐dependent diffusion coefficients of gases in heavy oils/bitumen using experimental pressure‐decay data

Digital holography interferometry for measuring the mass diffusion coefficients of N2 in RP-3 and RP-5 jet fuels

Contact Info

Product

Resources

About

Experimental study of the supercritical CO ₂ diffusion coefficient in porous media under reservoir conditions

Experimental study of the supercritical CO ₂ diffusion coefficient in porous media under reservoir conditions

Digital holography interferometry for measuring the mass diffusion coefficients of N₂ in RP-3 and RP-5 jet fuels