Simulation and history-matching of polymer-assisted water alternating CO2 injection using MRST

CO2 flooding is a widely employed method for enhancing oil recovery. However, it faces challenges stemming from differences in viscosity and density between oil and CO2, leading to poor sweep efficiency. This can result in issues such as viscous fingering, channelling, and gravity segregation, causing premature breakthroughs and excessive gas...

The effect of water-soluble polymers on water-alternating CO2 performance in porous media

In order to supply the demand of oil, enhanced oil recovery (EOR) techniques are nowadays widely applied in the oil recovery industry to maximize reservoir sweep efficiencies. CO2-EOR method has been largely used in the petroleum industry for several decades, which can contribute to the reduction of global greenhouse gas emission through CO2...

Numerical Simulation of Gas Flooding, Water-Alternating-Gas Injection, and Foam-Assisted Chemical Flooding

Chemical Enhanced Oil Recovery (CEOR) methods can increase the oil recovery of a reservoir to more than 60% of the volumes originally in-situ. Typical oil recoveries range from 20% to 40% of OIIP under traditional primary and secondary recovery stages. The understanding of the mechanisms that control such complex processes is essential...

Surfactant-Polymer Chemical EOR and Subsequent Oil Bank Behaviour

After a waterflood the oil saturation is (close to) the irreducible oil saturation, wherein oil in a porous medium is dispersed over the pore network in unconnected droplets due to snap off. In a chemical flood, the surfactant reduces oil-water interfacial tension and liberates the trapped oil droplets. These mobilised droplets coalesce into a...

Novel Method for Mitigating Injectivity Issues during Polymer Flooding at High Salinity Conditions

Synthetic polymers, in the emulsified form, have been utilized for enhanced oil recovery applications by using saline make-up water. However, there are concerns that have been raised about their injectivity. The large entangled polymer chains can clog the pore throats, giving a tendency to cause injectivity reduction. In this study, processing...

Developing and evaluating a model for Surfactant-Foam Flooding

Many reservoirs are considered unsuitable candidates for Enhanced Oil Recovery. Surfactant-Foam flooding, also referred to as Low-Tension-Gas flooding, could be a solution to enhance the oil recovery in tight, saline or high temperature reservoirs. SF-flooding combines reduction of the oil-water interfacial tension by surfactant, with mobility...

Developing a workflow for a study of polymer flooding in heterogeneous reservoirs

Polymer flooding can significantly improve the sweep efficiency in heterogeneous reservoirs compared to a water flood. This is caused by the improved mobility of the polymer flood, which has an effect on the crossflow mechanisms caused by viscous, capillary and gravitational forces in the reservoir. However it is not yet fully understood how the...