... connected spaces. During experiment, one of them is filled with nanoporous material to represent the shale nano-matrix, and the other one is used to simulate the fracture system. Then, by using this device, through a step-wise reduction on the test cell volume, the bubble point pressure of a hydrocarbon...

... Macropores and nanopores are distinguished based on a threshold pore size beyond which fluid-solid interactions are negligible. Due to fluid-solid interactions, the average fluid density within nanopores deviates from the bulk fluid density; thus, we use the density ratio of fluid in nanopores...

... Abstract To optimize CO 2 EOR operations, such as Huff and Puff (HnP), it is necessary to have a good understanding of oil- CO 2 transport both at nanopore and at reservoir scales. In this study, experiments were performed to investigate how pore adsorbed CO 2 can mediate oil flow in analog...

... Abstract We investigate binary gas transport with multilayer adsorption in nanoporous media by merging pore-scale properties obtained via multicomponent simplified density theory (MSLD) with continuum-scale transport modeling. Accordingly, we propose a diffusion-based gas transport model...

... mudrock nanopore economic geology viscosity nm slit pore injection simulation fluid-solid interaction slit nanopore diffusion coefficient slit pore collision diameter overestimation composition assumption Accurately determining the density distribution across pore width is essential...

... point pressure is found to be lower in nanopore-rich porous mediums compared to the bulk phase ( Barsotti et al., 2016 ; Cho et al., 2017 ). This implies that when the pressure reaches the bubble point pressure determined in the bulk phase, the fluid in the tight porous medium will remain in the liquid...

... production control pore pnm complex reservoir hydraulic fracturing coefficient chemical flooding methods co 2 thermal conductivity spe annual technical conference flow in porous media production monitoring expression diffusion coefficient nanopore journal transition shale gas enhanced...

... Abstract Nanopores in tight and shale reservoirs have been confirmed by numerous studies. The nanopores are not only the primary storage space of oil and gas, but also the main transport channels of confined fluids. Although considerable efforts have been devoted to study the confined behavior...

... nanometers, the portion of water molecules in the interface region increases relative to the total water molecules present in entire nanopores, and the average viscosity is dominated by the apparent viscosity of fluids near the wall. Besides, (iii) it is worth noting that the effect of pore wall...

... Abstract Numerous laboratory tests on the Northern American shale plays have observed a large number of nanopores. Because of the pore-proximity effect, the vapor-liquid phase equilibrium and transport performance of fluids in nanopores differ significantly from that observed in PVT cell...

... recovery chemical flooding methods equation of state pvt measurement sco 2 synthetic oil nanopore recovery factor molecule molecular simulation simulation synthetic oil mixture adsorption tendency oil recovery factor Introduction More than 90% of the oil remains unrecovered...

... with the thermodynamic model coupling Peng-Robinson equation of state and capillary pressure. We prove that Young-Laplace equation and Parachor model is still valid at nanoscale. When the pore space is confined by solid walls, the heterogeneous density distributions in nanopores are discovered. The decreased critical...

... Abstract The phase behavior shifts of hydrocarbons confined in nanopores have been extensively verified with experiments and molecular dynamics simulations. However, the impact of confinement on large-scale reservoir production is not fully understood. This work is to put forward a valid method...

...-temperature (PVT) analysis procedures that are employed in conventional reservoirs are also applicable to shale and tight reservoirs. However, traditional PVT analysis does not account for the nanoporosity of the shale and, therefore, neglects the ability of nanopores to significantly alter the phase behavior...

... Abstract Phase behavior of hydrocarbons in confined nanopores is quite different from that of the bulk. In confined space, the high capillary pressure between vapor phase and liquid phase, and depressed critical properties under confinement will all affect the in-situ phase behavior. According...

... A series of silica-based nanoporous materials are used as nanoporous hosts for hydrocarbons ( Table 1 ): MCM-41 (Mobil Crystalline Material-41), SBA-16 (Santa Barbara amorphous silica-16), CPG-4 (controlled pore glass-4 nm), SBA-15 (Santa Barbara amorphous silica-15), MSU-H (Michigan State...

..., and mineralogy on phase behavior of fluids confined in nanopores of tight formations has been studied by many researchers ( Salahshoor et al., 2018 ). Phase behavior alterations as a result of confinement require very careful consideration and management so as to avoid possible irreversible losses...

... of molecular structure's flexibility has not been reported yet to the best of our knowledge. Fluid flow in carbon nanopores has been investigated by experiments as well as by molecular simulations. The experiments show that the flux is much higher than the results by conventional models. As an example...

... framework for gas flow through shales. First, we use non-equilibrium MD to study the pressure-driven flow behavior of methane through organic, calcite, and clay (montmorillonite) nanopores under subsurface conditions, from which we build modified Hagen-Poiseuille equations to characterize the overall...

...) and triple-scale (bulk, 15 nm, and 5 nm) systems are simulated. The first bubble emerges from the bulk region at a lightly suppressed "apparent" bubble point pressure. Below the bubble point, the liquid saturation in the bulk region drops sharply, but the fluids in the nanopores are undersaturated throughout...