Multi-Level Inversion Based On Mesh Decoupling

Understanding the permeability of the subsurface is a crucial step to simulate fluid flow in the subsurface. A parameter estimation problem for the flow equations can be solved to find the permeability. The robust identification of material parameters remains a significant challenge. In classical approaches, the non-linear least-squares problem...

Feasibility of seasonal storage of green gas in Dutch geological formations

In a world with growing energy consumption, and concerns over climate quality, new ways of producing and storing clean energy is more relevant than ever. Storing ‘green’ gas (e.g. methane) is a new concept building on well-established fundamentals. Using renewable energy, through electrochemical processes (i.e. electrolysis), hydrogen is first...

Capturing the Plant-Water Dynamics of Corn: A study on the stomatal conductance and the leaf water potential of corn during the growing season

This study aims to characterize the variation in stomatal conductance and leaf water potential of corn plant in height over time on a diurnal time-scale and on a seasonal time-scale, under well-watered and water stressed conditions.<br/>An additional objective was the development of a protocol for plant-water relation measurements in radar...

Weak periodic boundary conditions: Effect on principal stress due to axial load under varying orientations

Multiscale computational homogenization is an efficient method to upscale the microstructural behavior of micro-heterogeneous materials. In this method, a representative volume element (RVE) is assigned to a macroscale material point and the constitutive law for the macroscopic model at that point is obtained by solving a boundary value problem...

Algebraic Dynamic Multilevel Simulation of Coupled Flow and Heat Transfer in Heterogeneous Geothermal Reservoirs with Fluid-Rock Non-Thermal Equilibrium Effects

Accurate simulation of fluid flow and heat transfer in geothermal reservoirs is a crucial necessity for optimising energy extraction strategies. However, natural formations (including geothermal ones) extend large length scales (in the order of km), while their properties (e.g., heat and flow conductivity) can change in small (fine) scales (e.g....

A Local Time-Stepping Method for Multiphase Flow in Porous Media

Simulation of multiphase flow in natural subsurface formations include selection of time-step size, i.e., the discrete snapshots (steps) over which the time-dependent nonlinear process is investigated. The simulation results would naturally depend on the size of the discrete time step, according to the order of accuracy of the implemented...

A Dynamic Multilevel Multiscale Framework for Accurate and Efficient Simulation of CO2-Brine Multiphase Flow in Heterogeneous Porous Media

One of the most important challenges facing academic, industrial and policy-making sectors is meeting with the increasing energy demand while preserving the affordability of the energy and maintaining the quality of the planet earth (including the environment, specially by reducing its greenhouse gas footprint). This global challenge demands for...

Gas flow through methane oxidation systems: A laboratory and numerical study for optimising system design

English: <br/>Landfills have been indicated as a major methane source. Methane oxidation systems are `low technology' systems that can treat these methane emissions. Yet, methane oxidation systems are herein still sub-optimal and leave room for improvement. A numerical model was established to research the effective gas permeability ratio...

Near wellbore effects induced by CO₂ injection and the influence on injectivity in depleted gas reservoirs

Sequestration of carbon dioxide (CO₂) in depleted gas reservoirs is an attractive choice, especially in The Netherlands, to reduce CO₂ emissions into the atmosphere. Injection of CO₂ in the subsurface geological formations can distort local thermal, chemical and geomechanical equilibria. As such, it results in...

Flow in Fractured Media: a Darcy-Stokes-Brinkman Modelling Approach

Coupling between porous media and free flow is widely present in many applications. In fractured reservoirs, fractures are often treated as parallel (smooth) plates, between which the flow is assumed to be steady state fully developed, with no-slip boundary condition. Under these assumptions, the Darcy law is employed inside fractures with...

Multiscale Finite Volume Method for Coupled Single-Phase Flow and Heat Equations in Fractured Porous Media: Application to Geothermal Systems

Modern geoscience challenges motivate the development of advanced simulation methods for large-scale geothermal fields, where single- or multi-phase flow is coupled with heat transfer equation in heterogeneous fractured formations. The state-of-the-art multiscale formulation for fractured media (F-AMS; Tene et al., JCP, 2016) develops an...

An Implicit Simulation Framework for Well Acidizing Process in Carbonate Reservoirs

This thesis elaborates on a newly developed Fully Implicit simulation model that captures the full coupling of reaction kinetics and fluid dynamics during carbonate matrix acidizing at an extensive (field) scale. The framework describes the physical processes at reservoir scale, by accounting for upscaled pore-scale-based quantities for reaction...

Energy capacity of a geothermal reservoir: The effect of conductive heat transfer recharge on reservoir lifetime at low temperature conduction regimes

The effect of conductive heat transfer recharge originating from the surrounding conduction dominated geothermal system on the geothermal reservoir lifetime has been reviewed during its development, by studying the effect of multiple reservoir and production parameters. A two dimensional (2D) finite volume implicit coupling strategy, using a...