Interfacial resistance in CO2-normal alkane and N2-normal alkane systems: An experimental and modeling investigation

Abstract

Gas-liquid systems are one of the most common systems which appear in hydrocarbon reservoirs; therefore, the investigation of the interfacial properties and effect of temperature and pressure on these systems is crucial for optimizing the plan of production. In this study, interfacial resistances for N 2 -alkane and CO 2 -alkane systems were estimated at different pressures and temperatures. A model was developed to calculate interfacial resistance using the equilibrium and dynamic interfacial tension data which were measured by pendant drop technique at different pressures and temperatures. Interfacial resistances were estimated for a temperature range from 313 to 393 K and pressures from 0.34 to 41.7 MPa. The results showed that interfacial resistance in N 2 -alkane and CO 2 -alkane systems decreased at higher pressure. Moreover, In N 2 -alkane systems, the interfacial resistance decreases as the temperature increases; however, in CO 2 -alkane system the interfacial resistance depends on the diffusion and solubility interactions; it will decrease, increase or remain constant.

Atomistic Molecular Dynamics Simulations of Carbon Dioxide Diffusivity in n-Hexane, n-Decane, n-Hexadecane, Cyclohexane, and Squalane

“…2 One of the most promising technologies for this is injection of CO2 in depleted oil reservoirs. In both examples, accurate models for the prediction of diffusion coefficients of CO2 in various hydrocarbons that make up the oil in the subsurface reservoirs are essential in order to design the appropriate processes, but only limited experimental measurements can be found in the open literature, [3][4][5][6][7][8][9][10][11][12][13][14][15][16] with the majority of them focusing on conditions in the neighborhood of 298 K and 0.1 MPa. Design of oil recovery and carbon sequestration processes requires knowledge of the diffusion coefficients at higher pressure and temperature conditions.…”