Prediction of Miscible Fluid-Fluid Displacement in Long Pipelines

In the oil and gas industry, it is crucial that the transport of hydrocarbons through long pipelines occurs in the most efficient and safest way. These pipelines can cover up to several tens to hundreds of kilometres. Hydrocarbons are not the only fluids present within the pipelines, often they are filled with a mixture of oil, gas, water and...

The effect of surfactant type, velocity and permeability on CO2 foam under miscible conditions

Miscible gas injection has been widely used worldwide to improve oil recovery. However, problems such as viscous fingering and gravity override undermine its success on a large scale. Foaming of the injected gas mitigates these problems by reducing the mobility of the gas.<br/><br/>Past studies using an ionic surfactant to foam CO2 in the...

The Effects of Oil on CO2 Foam Flooding under Miscible Conditions

Miscible gas injection, as an Enhanced Oil Recovery (EOR) method, can improve the recovery factor by swelling the residual oil and phasing out the interfacial tension. However, the sweep efficiency of miscible gas injection is not satisfactory because of conformance problems, such as viscous fingering, channelling and gravity override. Foam can...

Dynamic Local Grid Refinement for Incomplete Mixing in Reservoir Simulation

Reservoir simulation is a key tool to get insight in complex fluid flow phenomena occurring in many petroleum reservoirs, creating the possibility to quantify fluid productions and their uncertainty regarding many unknown properties. It has been shown by experimental and theoretical research that under certain criteria immiscible (multiphase)...

Analytical and Simulation Study of Sweep Efficiency in Gas-Injection EOR

WAG (Water-Alternating-Gas injection) is a non-thermal EOR process, which was proposed to improve the volumetric sweep efficiency and consequently the oil recovery during a gas injection project. Though miscible gas injection gives fantastic displacement efficiency due to its miscibility with oil, it usually shows very poor volumetric sweep...

Gravity-Enhanced Transfer between Fracture and Matrix in Solvent-Based Enhanced Oil Recovery

Solvent injection has been considered as an efficient method for enhancing oil recovery from fractured reservoirs. If the mass transfer would be solely based on diffusion, oil recovery would be unacceptably slow. The success of this method therefore depends on the degree of enhancement of the mass exchange rate between the solvent residing in...

Modeling of miscible CO2 foam displacements with oil

Fractional-flow theory provides key insights into complex foam IOR displacements and acts as a benchmark for foam simulators. In some cases with mobile oil present the process can be represented as a two-phase displacement. We examine two such cases. A first-contact miscible gas flood with foam injection includes a chemical shock defining the...