... Hydrogen Susceptibility Ratio ( Fig. 4 ) A very popular chart, is the potential stat for hydrogen to begin. With thermal diffused zinc the OCP may be -.865mV to -.850mV on the surface with 10% Fe. But as we eventually wear away the surface the OCP = -.825mV and has a 28% Fe closer...

... D ij – Diffusion coefficient of binary mixture [ m 2 / s ] In the paper we estimate hydrogen-methane diffusion coefficients, which can be used as an input for numerical simulation studies. Considering diffusion through porous medium, the diffusion coefficient needs to be adjusted...

... that control the amount and pattern of salt precipitation and clogging due to water vaporization. Their values are determined by the complex interplay between viscous force, gravity, the evaporation of water into the CO 2 stream, the molecular diffusion of dissolved salt in the brine, and surface phenomena...

... the production cycle of UHS, numerical simulation was applied. One of the important processes in UHS is molecular diffusion within the reservoir. The hydrogen recovery factor and methane to hydrogen production ratio were compared for cases with and without diffusive mass flux. Furthermore, a sensitivity analysis...

... In this work, the Dusty-Gas implementation of the real gas version of the Maxwell-Stefan formulation is used to account for molecular and Knudsen diffusion. Additionally, Darcy's law is used to represent convective fluxes, and adsorption and desorption is considered using Extended Langmuir theory...

.... (1981) , Majeed et al . (1990) , Brown et al . (1993) , Singh et al . (1999) , Azevedo and Teixeira (2003) and Aiyejina et al . (2011) include; molecular diffusion, Brownian diffusion, shear dispersion, gravity settling and shear stripping. As of today, the actual relevance of all...

... Abstract During the past decade, enhanced oil recovery (EOR) by CO 2 in shale oils has received substantial attention. In shale oil reservoirs, CO 2 diffusion into the resident oil has been considered as the dominant interaction between the CO 2 in fractures and the oil in the matrices. CO 2...

... the efficiency of species transfer between fracture and matrix. It is shown that the behavior can be scaled and described according to the magnitude of two characteristic dimensionless numbers: the ratio of diffusion time scales in shale and fracture α , and the pore volume ratio between the shale and fracture...

... force diffusion free gas solution gas equation diameter approx sm 3 society of petroleum engineers oil and gas Introduction The reservoir under examination is an oil sandstone. The thickness of the oil column is 600 m. The lithology is complex and includes dispersed clay (mainly mixed...

... permeability considering viscous flow, Knudsen diffusion, surface diffusion and desorption, and introduced these into the macro seepage model to establish a dynamic pressure analysis model considering reservoir heterogeneity and stress sensitivity effect of MFHWs in shale gas reservoirs. Based on the five...

... restriction. Furthermore, we find that nonlinear diffusion processes in liquid-rich shales, for which pressure-dependent rock and fluid properties are given in exponential form, can be fully described by using the Porous Medium Equation (PME). We present a straightforward application of the PME to predict...

..., the better CO 2 enhanced gas recovery (EGR) performance. shale gas methane Upstream Oil & Gas enhanced recovery surface diffusion coefficient complex reservoir adsorption shale play shale gas reservoir co 2 diffusion adsorption capacity enhanced gas recovery reservoir gas recovery...

... 2 ) ∂ P ∂ x Diffusional mass transfer rate, on the other hand, is calculated by the molar flux, molecular weight and cross section area as follows: (9) M d f s = J d f s A d f s M C H 4 Diffusion molar flux is calculated by Fick's...

... for the life of the well. This work presents a diffusion-controlled model for simulating the conversion of cement hydration products to calcium carbonate and subsequently to water-soluble calcium bicarbonate, predicting the depth of penetration of the two reaction fronts. Temperature, total pressure...

... of computed and observed dynamic pressures show fair fits. flow in porous media spe 164892 backbone fractal pressure transient analysis Fluid Dynamics sub-critical cluster Bernard derivative Upstream Oil & Gas dimension Laplace transform diffusion pressure transient testing exponent...

... = 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...

... into solution, will be answered. Both, numerical and experimental studies in the literature report two different diffusion parameters, differing by more than one order of magnitude. These findings are confirmed in our experiments. In the literature, rapid dissolution is attributed to the appearance of natural...

... condensate reservoir, by production and dropping the pressure below the dew point, condensate is formed in the matrix and fracture. There are few publications about condensate recovery mechanisms in fractured gas condensate reservoirs. Gravity drainage, molecular diffusion, viscous and capillary forces...

... in porous media condensate recovery diffusion fluid dynamics nitrogen concentration upstream oil & gas simulation effective fracture permeability dew point pressure nitrogen injection matrix permeability fracture fractured reservoir injection fracture permeability enhanced recovery...

... of the mixture. If the corresponding Rayleigh number of the porous medium is high enough to initiate convection flows, density-driven-convection happens and the rate of dissolution increases. Early time dissolution of CO 2 in brine is mainly dominated by molecular diffusion while it will be accelerated...