Gas reservoirs usually have high recovery due to high mobility and low residual gas saturation, although some of them producing under water-drive mechanism have low recovery efficiency. Encroachment of water into these reservoirs traps considerable amount of gas and increases the maximum residual gas saturation, which results in the reduction of gas and condensate production. Generally, the rec...

The carbon dioxide flux at the air/water interface in lakes was calculated after the determination of H2CO3* (free CO2) and atmospheric CO2 using flow injection analysis (FIA) coupled to a conductometric detector. The method is based on the diffusion of CO2 through a hydrophobic membrane into a flow of deionized water, generating a gradient of conductivity proportional to the concentration of C...

Dimethyl ether (DME) is a compound first introduced by Shell as chemical solvent for enhanced oil recovery (EOR). This study aims to investigate the efficiency of EOR using minimum miscible pressure (MMP) and viscous gravity number when mixed CO2 DME injected. Adding water-alternating-gas process reduces MMP number. Reduction in results conditions at lower pressures, which has favorable effect ...

In this study, oil production and retention were observed compared in 72 reservoir simulation cases, after which an economic analysis for various CO2 prices was performed. Reservoir cases comprise different combinations of water alternating gas (WAG) ratios, permeabilities, well distances. These models set at three depths; thus pressure temperature conditions, to see the impact miscibility on s...

CO2 capture is an important aid to achieve the goals of reduced emissions. Today market for captured limited. Injection in oil reservoirs one way utilizing and provide permanent storage CO2. By injecting CO2, mobility increased, amount residual reduced. This called enhanced recovery. The goal this study show effects injection combined with autonomous inflow control valves on production. Simulat...

Experiments were carried out to test the hypothesis that ventilatory and cardiovascular responses to hypercarbia (elevated water P(CO2)) in the tambaqui Colossoma macropomum are stimulated by externally oriented receptors that are sensitive to water CO(2) tension as opposed to water pH. Cardiorespiratory responses to acute hypercarbia were evaluated in both the absence and presence of internal ...

[1] Deep aquifers are potential long-term storage sites for anthropogenic CO2 emissions. The retention time and environmental safety of the injected CO2 depend on geologic and physical factors and on the chemical reactions between the CO2, the aquifer water, and the host rocks. The pH buffer capacity of the aquifer water and the acid neutralization potential of the host rocks are important fact...

CO2 utilization for oil recovery applications is often impacted by the challenges such as viscous fingering and its premature breakthrough. Injection of slugs water-alternating-gas (WAG) generally aims to overcome these though control mobility. Moreover, potential WAG largely dependent on injection water salinity subsequent dissolution storage. Therefore, effect varying (0–4 wt% NaCl) loading c...

In this study, the multiphase multicomponent Shan-Chen lattice Boltzmann method is employed to analyze impact of capillary force on oil-CO2-water fluid flow and enhanced oil recovery. Various sizes single throat are designed simulate interaction between displacing displaced phases as well their mechanical equilibrium. Several sensitivities taken into account, such wettability, miscibility, inte...