... in nanoporous media on a continuum scale but informed by pore-scale phenomena. organic-rich rock complex reservoir clastic rock equation of state geologist reservoir simulation shale gas mudstone diffusion coefficient ch 4 fraction reservoir characterization isotherm co 2 rock type enhanced...

.... Water adsorption isotherms have also been quantified on shale samples ( Ma et al. 2020 ; Dang et al. 2021 ); however, the objective of these publications was not to demonstrate the correlation between wettability and water adsorption. For instance, Ma et al. (2020) computed water vapor adsorption...

... Abstract Experimental methods are commonly used to determine the ability of a rock to adsorb gas by means of isothermal adsorption experiments. Adsorption isotherms quantitatively describe the relationship between the amount of gas adsorbed onto a rock surface and associated equilibrium...

... relationship dewpoint upstream oil & gas shale gas cgr eagle ford choke management figure 4 shale reservoir condensate banking adsorbed ga oil shale shale oil choke choke history stb mmscf isotherm petroleum engineer Statement of the Problem Unconventional wells are generally...

... with supercritical CO 2 at reservoir conditions. The isothermal bulk modulus β T of liquids under pressure, simply defined as the first-order derivative of pressure with respect to volume, is determined in this study from the derivative of pressure with respect to density. The density data were obtained from...

... the organic nanoporous media. Isothermal condition is held. The temperature remains constant with time. Diffusion model The mass conservation equation for the single component g in multiple homogeneous phases consists of accumulation, flux, and source terms, which can be expressed...

... psi, a hundred-fold smaller than the absolute pressure transducer measuring to 5000 psi, leading to a significant increase in the accuracy of adsorption measurement. Methane adsorption isotherms on Marcellus shale are measured at 303, 313, 323 and 333 K with pressure up to 3000 psi. A fugacity-based...

... to study fluid phase behavior in shale and tight cores with high accuracy and efficiency. In the course of an exhaustive three-year research program, we have used this apparatus to measure the first capillary condensation isotherm for a fluid mixture with more than two components and discovered new...

... solution in porous media that had never been in contact with polymer composed the fresh-adsorption experiments. Differently, the re-adsorption experiments were performed in media that had been flushed with the same polymer previously. The experiments indicated a type IV isotherm for fresh-adsorption, while...

... Abstract Adsorption and flow characteristics of methane and other natural gases onto tight rock formations is of economic interest for the proper evaluation and production of the field. In this work, a novel technique to enable the determination of adsorption isotherms and permeability of a gas...

... adsorption isotherms in multi-scale pore networks that simulate real pore structures inside shale. The influence of water saturations (in kerogen and clay) and pore distributions on gas adsorption is examined with our new model. 3D pore networks which connect both mesopores (2-50nm) and macropores (>50nm...

... capabilities compared to alkanes. complex reservoir Reservoir Characterization Upstream Oil & Gas vandenbroucke shale gas carbon dioxide adsorption isotherm kerogen structure onsager coefficient maturity adsorption water molecule reservoir simulation methane isotherm diffusion...

...Statement of Theory Story behind isotherms In a static volumetric method, adsorption and desorption are depicted by an isotherm ( Fig. 3 ). Isotherms illustrate the resulting increase in volume of gas adsorbed as the pressure is increased up to the saturation pressure of fluid. Similarly...

...) simulations. In this study, adsorption isotherms of methane and carbon dioxide are compared by performing grand canonical Monte Carlo (GCMC) simulations in identical setups of carbon channels. Excess and absolute adsorption isotherms of these gases are plotted and compared. Furthermore, the surface...

... production decline rates. shale gas flow in porous media isotherm pore size distribution relative permeability curve Fluid Dynamics diffusion hysteresis Upstream Oil & Gas relative permeability kerogen complex reservoir pore saturation fractal dimension percolation threshold...

.... In this paper, we develope a model to characterize PSD of shales using water adsorption isotherms. We apply the model on several shale samples and compare the results with the PSDs obtained from BET (Brunauer-Emmett-Teller) analysis using the N 2 and CO 2 adsorption isotherms. The proposed model describes...

... calculations confirmed the preferential sorption of CO 2 in shales compared to other gases. The Barnett sample in particular adsorbed about four and a half times more CO 2 than CH 4 . N 2 and CH 4 sorption were fitted with a Langmuir model where a monolayer sorption is assumed. The, CO 2 sorption isotherm...

... in shale reservoirs is mainly composed of free gas within fractures and pores and adsorbed gas in organic matter (kerogen). It is generally assumed in the literature that the monolayer Langmuir isotherm describes gas adsorption behavior in shale gas reservoirs. However, in this work, we have analyzed...

... concentration-dependent. In field applications of polymer and chemical floods, reduced polymer retention may be achieved by first injecting a low-concentration polymer bank. dynamic measurement ppm porosity retention upstream oil & gas isotherm polymer retention polymer adsorption enhanced...

.... In this work, physical and numerical pressure-transient, pulse-decay experiments are conducted on Eagle Ford shale cores. The experiments are conducted isothermally at various pore and confining pressures that maintain a constant net effective stress. The gases investigated are helium, methane, and carbon...