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Keywords: diffusion coefficient
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Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europe Energy Conference and Exhibition, June 26–28, 2024
Paper Number: SPE-220035-MS
... the effective binary diffusion coefficients of hydrogen and methane under representative gas storage conditions. In total, seven diffusion measurements were carried out for two sandstone samples (Berea and Bentheimer). A modified core flooding cell was used for these measurements. A semi- steady-state...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europe Energy Conference and Exhibition, June 26–28, 2024
Paper Number: SPE-220008-MS
... processes. The concentration changes were matched with the results of numerical simulation to determine the diffusion coefficients. The measured bulk diffusion coefficients within the temperature range 28-100 °C follow the kinetic gas theory. The effective hydrogen-methane diffusion coefficient through...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EuropEC - Europe Energy Conference featured at the 84th EAGE Annual Conference & Exhibition, June 5–8, 2023
Paper Number: SPE-214451-MS
... D ij - Diffusion coefficient of binary mixture [ m 2 / s ] τ - Tortuosity φ – Porosity D – Diffusion coefficient (without porous medium) Classification of the Diffusion in the Porous Medium The magnitude of diffusive flux in the pore space depends on the relative size...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EuropEC - Europe Energy Conference featured at the 84th EAGE Annual Conference & Exhibition, June 5–8, 2023
Paper Number: SPE-214435-MS
... was carried out to identify important factors for UHS. The following parameters were investigated: permeability contrast, vertical to horizontal permeability ratio, reservoir heterogeneity, binary diffusion coefficient, and pressure dependent diffusion. In addition, the effects of numerical dispersion...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EuropEC - Europe Energy Conference featured at the 83rd EAGE Annual Conference & Exhibition, June 6–9, 2022
Paper Number: SPE-209636-MS
... was calculated by taking ratio of CO 2 and CH 4 in the gas and adsorbed phase respectively. Furthermore, adsorption data was used for discussing the sorption kinetics in coal and diffusion coefficient was evaluated. Furthermore, the thermodynamic parameters were also calculated and integrated with above noted...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EuropEC - Europe Energy Conference featured at the 83rd EAGE Annual Conference & Exhibition, June 6–9, 2022
Paper Number: SPE-209668-MS
... ) This is a nonlinear diffusion equation where we can introduce a nonlinear diffusion coefficient D ( S ) as below: (20) ∂ S ∂ t = 1 L 2 ∂ ∂ X ( D ( S ) ∂ S ∂ X ) , (21) D ( S ) = σ o w μ m Δ s w K ϕ Λ ( S...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EuropEC - Europe Energy Conference featured at the 83rd EAGE Annual Conference & Exhibition, June 6–9, 2022
Paper Number: SPE-209718-MS
... reservoir characterization asset and portfolio management experiment supercritical co 2 gas injection injection characteristic enhanced gas recovery reaction tight gas field co 2 diffusion coefficient natural gas gas field structural geology gas reservoir coefficient supercritical state...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europec featured at 81st EAGE Conference and Exhibition, June 3–6, 2019
Paper Number: SPE-195536-MS
... component i (in moles component per volume matrix rock) and C i is the concentration of gas component i (in mol per volume gas mixture). D i,e is the effective molecular diffusion coefficient of gas components and depends on the free molecular diffusion coefficient D i ,f and the tortuosity τ...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europec featured at 80th EAGE Conference and Exhibition, June 11–14, 2018
Paper Number: SPE-190854-MS
...-porosity model recovery diffusion coefficient Upstream Oil & Gas final recovery coefficient dual porosity model capillary pressure permeability injection fractured reservoir fracture Oil Recovery reservoir Introduction Approximately 60% of the world's conventional oil reserves...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europec featured at 80th EAGE Conference and Exhibition, June 11–14, 2018
Paper Number: SPE-190819-MS
... which, a better estimate of the fracture productivity is expected. hydraulic fracturing calcite formation reservoir temperature diffusion coefficient leakoff coefficient concentration acid concentration coefficient reaction Upstream Oil & Gas acid penetration distance acid closure...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europec featured at 78th EAGE Conference and Exhibition, May 30–June 2, 2016
Paper Number: SPE-180183-MS
... gradient production pressure diffusion coefficient compressibility INTRODUCTION Production of heavy oil resources has a practical meaning to meet the world’s future energy demand due to the declining light and medium crude oil reserves. Among various heavy oil recovery processes, solvent-based...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europec featured at 78th EAGE Conference and Exhibition, May 30–June 2, 2016
Paper Number: SPE-180102-MS
... measurement Modeling & Simulation STO diffusion coefficient injection reservoir co 2 matrix capillary pressure injection rate Reservoir Conditions mechanism saturation experiment EOS model lab-oil experiment permeability fracture experimental data oil recovery Introduction...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the EUROPEC 2015, June 1–4, 2015
Paper Number: SPE-174383-MS
..., in this study, a new approach is proposed. In this model, a pseudo diffusion coefficient is introduced into the unsteady-state diffusion equation based on the second Fick's law. A so-called pseudo diffusion coefficient was defined as a function of time to capture the variable dissolution rate occurring during...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the EAGE Annual Conference & Exhibition incorporating SPE Europec, June 10–13, 2013
Paper Number: SPE-164840-MS
... = 827.26 and b 4 = −635.26. Also, p is gas pressure expressed in MPa and T is temperature in Kelvin. The diffusion coefficient for methane through bitumen is in the range of 10 −9 to 10 −12 m 2 /s ( Fisher et al., 2000 ; Sheikha et al., 2005 , Javadpour et al., 2007 ). Stainforth...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europec/EAGE Annual Conference, June 4–7, 2012
Paper Number: SPE-153349-MS
...) depends on matrix porosity, velocity of the front, fracture spacing and permeability contrast. The molecules of the injected gas are diffusing into the matrix while the components of the reservoir gas are diffusing towards the fracture. The various components have different diffusion coefficients...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Europec/EAGE Annual Conference, June 4–7, 2012
Paper Number: SPE-154901-MS
... ( Lindeberg and Wessel-Berg, 2011) , (28) t c r i t = 48.7 D ( φ μ k Δ ρ g ) 2 in which D is the diffusion coefficient, φ is porosity, μ is brine viscosity, Δρ is maximum density difference for fully saturated brine, g is acceleration of gravity and k...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, May 23–26, 2011
Paper Number: SPE-140772-MS
... affinity complex reservoir coal seam gas reservoir diffusion coefficient gas recovery Introduction Primary gas production from coal seam gas reservoirs including pressure depletion and hydraulic fracturing generally results in 50% gas recovery factor ( Brown et al., 1996 ; Gunter et al., 1997...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, May 23–26, 2011
Paper Number: SPE-143633-MS
... these processes is limited. To find out the contribution of convective dispersion in enhanced production rates in VAPEX, three experiment sets were conducted for a system of propane and Athabasca bitumen. In the first set, molecular diffusion coefficient of propane in Athabasca bitumen was determined through...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, June 14–17, 2010
Paper Number: SPE-131297-MS
... Gas permeability of film stabilized by β-C 12 G 2 to Oxygen calculated from Eq. (3) Film type K (cm/s) NBF 0.03 ± 0.01 CBF 0.06 ± 0.01 Figure 8 Gas permeability vs. product of Henry's-law constant and diffusion coefficient of the gases in Table 3 . Figure 1...
Proceedings Papers
Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the EUROPEC/EAGE Conference and Exhibition, June 8–11, 2009
Paper Number: SPE-121195-MS
.... equation of state climate change Upstream Oil & Gas concentration subsurface storage equilibrium mass transfer experiment initial pressure enhanced mass transfer Rayleigh number co 2 fluid modeling reservoir simulation effective diffusion coefficient Henry coefficient geometry natural...
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