Fluid Conductivity of Steady Two-Phase Flow in a 2D Micromodel: Analysis of a Representative 2D Percolation Model

Foams are used in reservoir engineering for enhanced oil recovery, CO2 sequestration and environmental remediation of aquifers and soils. One of the main mechanisms for foam generation at steady state is Roof snap-off. In some cases, mechanistic models of Roof snap off, based on observations from 2D micromodels are used for...

Analysis of Steady Multiphase Flow in Porous Media: Across a Hypothetical 2D Percolating Network

Steady multiphase flow in two-dimensional (2D) porous media has not been established without the continuous fluctuation in pore occupancy. Cox (2019) proves the ability of liquid to bridge a gas-filled pore throat that is narrow and deeply etched, allowing liquid and gas to flow simultaneously. In this investigation, a pore network study was...

An Extended Buckley-Leverett Model for Non-Newtonian Foam Injection

Scope: Surfactant-alternating-gas (SAG) is the preferred method of foam injection to improve sweep efficiency in enhanced-oil-recovery (EOR). Here, for the first time, fractional-flow theory is extended to include the shock for gas injection in the high-quality regime for radial flow in a non-Newtonian SAG process for shear-thinning and shear...

Numerical Simulation of Radial Non-Newtonian Foam Flow in a Reservoir

Non-Newtonian foam flow in a reservoir can be modeled numerically by discretization of the corresponding analytical formulas. The injection of foam is compared to the injection of water by comparing the injection pressures, which is represented as a dimensionless pressure rise at the injection well. The model first applies the forward-difference...

Influence of Transient Effects on Fitting Parameters to SAG Foam Core-Foods

Foam is a promising means of increasing sweep efficiency in enhanced oil recovery processes where gas is injected into a reservoir. However, the effectiveness of foam is hard to predict due to its complex behavior. Therefore accurate modeling is important to effectively predict field performance. This requires correct foam parameters in...

Effect of oil on foam flow in porous media modeled by the Stochastic Bubble Population model

The Stochastic Bubble Population (SBP) model invented in 2006 by Prof. Dr. Zitha has been improved to take in account for the oil presence in the porous medium through which foam flows. The assumptions of the SBP model are that foam flow in porous media is a complex fluid and bubble generation is a stochastic process. The SBP model is a simple...

Injectivity errors in foam EOR

Simulators play a crucial role in EOR reservoir modeling. One of the big problems with the simulation of gas injection in SAG foam processes, is that foam collapse near the injection well is poorly represented in the simulator well model. This paper focusses on the question whether a simulator using the Peaceman equation for a homogeneous...

Model for gas sweep with foam

In this BSc-thesis a Surfactant-Alternating-Gas (SAG) foam displacement is represented by an idealized model. Shan and Rossen show in the article ‘Optimal Injection Strategies for Foam IOR’ (2004) that this model, though greatly simplified, is a useful representation of a foam displacement in the physical world, where pressure gradient is the...

Effect of Diffusion on Foam Bubble Size Distribution and Gas Mobility: An Idealized 2D Model

In this thesis the effect of gas diffusion between bubbles on the bubble-size distribution and capillary resistance to foam flow in a bubble train is investigated using an idealized 2D pore model. First the shape of the model pore is discussed and how a lamella moves through it. Then the physical forces (lamella curvatures and pressure...