... and then, after a brine injection flush, with polymer. In the second test, the surfactant was directly injected with polymer. For both tests, in order to bypass the adsorption effect, the surfactant injected volumes at breakthrough were determined on rocks having their surface already fully saturated...

... with enhancing the coalbed methane recovery. Thus, the cost of CO 2 sequestration may be offset completely or partially. The main objective of the paper was to comprehend the CO 2 -ECBM displacement using the three concepts viz. competitive adsorption, diffusion, and thermodynamic modelling of coal Methods...

... 2 can adsorb to the surface of the rock due to bond deficiency between the CO 2 and the shale ( Charoensuppanimit, P. et al., 2016 ; Clarkson, C.R., 2003 ; Liu, Q. et al., 2018 ; Le, T.D. et al., 2017 ). Part of the CO 2 can therefore be stored into the shale formation through this adsorption...

... Many previous studies investigated the adsorption of surfactants by rock surface under different conditions using several methods. In this study, two methods for measuring the amount of surfactant adsorbed onto carbonate surface are compared. Materials Abstract Surfactant based foams...

... reduces due to adsorption and entrapment: (1.6) u = − k ( c ^ , s ) μ w p ( c ) ∂ p ∂ x . We approximate the inverse permeability as the first terms of its Taylor's expansion, i.e., (1.7) k 0 k ( c ^ , s ) 1 + r c...

... of polymer retention mechanisms in porous media. We identified three mechanisms leading to polymer retention: adsorption, mechanical entrapment, and hydrodynamic retention. Polymer adsorption on the chip surfaces resulted in flow conductivity reduction in specific pathways and complete blockage in others...

... methods are much better at fitting data with complex nonlinear features than MLR, but they are also much less interpretable regarding specific gas adsorption behavior. For SVM, RF and ANN models, 1000 simulations were run and averaged for performance comparison by randomly partitioning the data...

... + ) - ( ≡ SiO − ) ] enhanced recovery concentration investigation nanoparticle Upstream Oil & Gas ionic interaction wettability alteration interaction adsorption silica nanoparticle core sample differential pressure nanofluid waterflooding emulsion surfactant porous media...

... 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...

...Transport description A general transport description of compressible compositional gas flow involving advection, diffusion and adsorption is given by (modified from Chen et al. (2006 )): Mathematical Model List of assumptions: Porosity and characteristic pore radius...

... been successful, difficulties such as poor injectivity, potentially leading to uncontrolled fracturing, and high adsorption of chemicals, penalizing the economics, represent serious challenges ( Delamaide et al. 2014 ; Marliere et al. 2015 ). Materials and methods For reproducibility reasons...

... reservoir characteristics (i.e., permeability, thickness, residual oil saturation, chemical adsorption) and project design parameters (i.e., pattern size, chemical slug size and concentration), Model #2 predicts reservoir characteristics by history matching the reservoir response, and Model #3 predicts...

...) of the adsorbed film were modelled mathematically using the Sauerbrey relation with the QCM-D output as input. In addition, we present Surface Complexation modelling (SCM) evaluation of possible electrostatic linkages of the studied COBR system. The kinetics of oil adsorption during COBR interactions were...

... porous reservoir rock. Researchers have proposed various EOR mechanisms such as disjoining pressure gradient ( Chengara et al., 2004 ; Wasan et al., 2011 and McElfresh et al., 2012 ), IFT reduction, wettability alteration, and plugging of pore throats by adsorption of nanoparticles. Li et al...

... in recent years. This unconventional resource is stored densely packed into the shale matrix through adsorption, in addition to occurring as free gas in the pores, which accounts for the large volume of reserves. Gas production from these low permeable deposits is made possible by drilling horizontal wells...

... viscosity-enhancing performance. In a flooding process, chemicals represent a significant share of the total cost. A high polymer adsorption at the pore surface can substantially delay oil displacement and recovery so adsorption, either sandstones or carbonates, has to be considered for the economic...

.... However, nearly none of them considered the effects of methane adsorption. This paper utilizes the simplified local-density (SLD) theory to study adsorption of supercritical gas in shale gas reservoirs. On the basis of the basic features of high pressure supercritical adsorption of shale gas, Peng...

... μm were submited to laboratory corefloodtests. SMG propagation in reservoirs is driven by a size exclusion mechanism. Microgel size prevents invasion of low permeability zones and creates flow resistance in high permeability zones by adsorption on the rock. The permeability cutoff can be tuned...

... flooding methods adsorption viscosity polymer concentration retardation relative permeability surfactant incremental oil recovery interfacial tension dispersion experiment low interfacial tension separation reservoir Oil Recovery Introduction Alkali Surfactant Polymer (ASP) Flooding...

... as components of the water-based fracturing or re-fracturing fluids. Since hydraulic fracturing operation involves the contact of fluid with a very large surface area of the matrix, the questions of adsorption and penetration of surface active substances present in the fluid on and into the rock matrix...