Summary In recent years there has been an increasing interest in water-alternating-gas (WAG) processes, both miscible and immiscible. WAG injection is oil recovery method initially aimed to improve sweep efficiency during gas injection. some applications produced hydrocarbon reinjected water-injection wells with the aim of improving pressure maintenance. Oil by attributed contact unswept zones, especially attic or cellar exploiting segregation top accumulating water toward bottom. Because...

CPA (Cubic-Plus-Association) is an equation of state that based on a combination the Soave−Redlich−Kwong (SRK) with association term Wertheim theory. The development started in 1995 as research project funded by Shell (Amsterdam), and model was first published 1996. Since then, it has been successfully applied to variety complex phase equilibria, including mixtures containing alcohols, glycols, organic acids, water, hydrocarbons. Focus placed cases industrial importance, e.g., systems...

Subsurface geothermal energy storage has greater potential than other strategies in terms of capacity scale and time duration. Carbon dioxide (CO2) is regarded as a medium for due to its superior thermal properties. Moreover, the use CO2 plumes mitigates greenhouse effect by storing geological bodies. In this work, an integrated framework proposed synergistic sequestration utilization. Within framework, first injected into layers accumulation. The resultant high-energy then introduced target...

In this second article of the review on applications CPA (Cubic-Plus-Association) equation state, focus is placed cross-associating systems. Various such mixtures are investigated, including (i) systems with two self-associating compounds (e.g., water−alcohol or glycols, organic acids, alcohols) but also binaries only one substance, where solvation expected CO2 styrene water). The method accounting for cross-association (combining rules) and association scheme alcohols investigated. Finally,...

The chilled ammonia process absorbs the CO2 at low temperature (2–10 ∘C). heat of absorption carbon dioxide by is significantly lower than for amines. In addition, degradation problems can be avoided and a high capacity achieved. Hence, this shows good perspectives decreasing energy requirement. However, scientific understanding processes required. properties NH3- CO2- H2O system were described using Extended UNIQUAC electrolyte model developed Thomsen Rasmussen in range from 0 to 110 ∘C...

Abstract The Cubic‐Plus‐Association (CPA) equation of state is applied to a large variety mixtures containing H 2 S, which are interest in the oil and gas industry. Binary S with alkanes, CO , water, methanol, glycols first considered. interactions polar compounds (water, glycols) modeled assuming presence or not cross‐association interactions. Such accounted for using either combining rule cross‐solvation energy obtained from spectroscopic data. Using parameters binary systems, one ternary...

Abstract In recent years there has been an increasing interest in water-alternating-gas (WAG) processes, both miscible and immiscible. WAG injection is oil recovery method initially aimed to improve sweep efficiency during gas injection. some applications produced hydrocarbon re-injected water wells with the aim of improving pressure maintenance. Oil by attributed contact unswept zones, especially attic or cellar exploiting segregation top accumulating towards bottom. Since residual after...

The cubic-plus-association (CPA) equation of state (EoS) is applied, using different combining rules, to vapor−liquid equilibria (VLE) and liquid−liquid (LLE) alcohol−water systems. It demonstrated that the Elliott rule (ECR) with a common temperature-independent interaction parameter provides very adequate VLE correlations over extended temperature pressure ranges, yielding also satisfactory description azeotropic behavior. LLE heavy systems best described CR-1 single parameter....

Partial pressures of carbon dioxide (CO2) over aqueous solutions monoethanolamine (MEA), diethanolamine (DEA), and N-methyldiethanolamine (MDEA) have been correlated using a simple approach where only one chemical equilibrium reaction is taken into account assuming ideal gas liquid properties. The combines the Henry's law constant for formation carbamate primary secondary alkanolamines (MEA, DEA) or bicarbonate tertiary alkanolamines(MDEA), resulting in an explicit expression calculating...

An upgraded version of the extended UNIQUAC thermodynamic model for carbon dioxide−ammonia−water system has been developed, on basis original proposed by Thomsen and Rasmussen (Chem. Eng. Sci. 1999, 54, 1787). The was valid in temperature range 0−110 °C, pressure 0−10 MPa, concentration up to 80 m ammonia. In this work, validity 150 °C accuracy improved increasing number experimental data points from 2000 more than 3700. These consisting vapor−liquid equilibrium various ranges, enthalpy...

Confined fluids such as oil and gas mixtures inside tight reservoirs are systems that can experience high capillary pressure difference between the liquid phases. This has an effect on phase equilibrium in some cases is considerably high. We presented algorithm which reliably compute whole envelope for multicomponent when there a difference. It uses equation of state Young–Laplace model. The proves to be robust efficient test with wide ranges compositions at different radii vapor fractions....

As a result of the small pore sizes and organic content shale, capillary pressure adsorption are two effects that should be taken into account in study phase equilibrium inside shale. The inclusion both modeling can shed light on how bulk composition porous media changes with temperature accordingly. In long run, such model used reservoir simulation for more complicated analysis. this study, we present calculation method effectively include capillarity. We propose to introduce an excess...

Injecting CO2 into hydrocarbon reservoirs can enhance the recovery of resources, and simultaneously, be stored in reservoirs, reducing considerable amount carbon emissions atmosphere. However, injected tends to go through fractures, high-permeability channels streaks present resulting inefficient coupled with low storage performance. Conformance treatments CO2-resistant crosslinked polymer gels were performed this study mitigate channeling issue promote synergy between enhanced oil (EOR)...

The cubic-plus-association (CPA) equation of state is applied to phase equilibria mixtures containing alcohols, glycols, water, and aromatic or olefinic hydrocarbons. Previously, CPA has been successfully used for various associating compounds (alcohols, amines, organic acids, water) aliphatic We show in this work that the model can be satisfactorily extended complex vapor−liquid−liquid with solvation between aromatics/olefinics polar accounted for. This particularly important water but less...