Efficient application of stochastic Discrete Well Affinity (DiWA) proxy model with adjoint gradients for production forecast

In this paper, we describe adjoint gradient formulation for the Operator-Based Linearization modeling approach. Adjoint gradients are implemented in Delft Advanced Research Terra Simulator (DARTS) framework and applied for history matching using a proxy methodology. Due to the application of adjoint gradients, the computational efficiency of...

Dispersion and Heat Conduction in a Simplified Geothermal Doublet

The goal of this study is to test out the accuracy of the upscaling approach (Jinyu Tang, 2021) for a geothermal doublet. This approach tries to simulate the physical thermal dispersion. When modeling in a geothermal reservoir it would be easy if a lot of layers can be upscaled. However, when doing upscaling one can not just take an average of...

Accurate geothermal and chemical dissolution simulation using adaptive mesh refinement on generic unstructured grids

A coupled description of flow and thermal-reactive transport is spanning a wide range of scales in space and time, which often introduces a significant complexity for the modelling of such processes. Subsurface reservoir heterogeneity with complex multi-scale features increases the modelling complexity even further. Traditional multiscale...

Geothermal Energy Production From Faulted Systems with Stress-Induced Aperture Changes

Transition to cleaner energy while sustaining the heat demand necessity has always been an emphasized topic in the recent years. With the slowly declining utilization and production of natural gas in Netherlands, geothermal energy shows a promising future in providing sustainable power for heating and various applications. For majority of...

Geothermal Field Development Strategies Based on Economic and Fault Stability Analysis: A Case Study for the Delft Sandstone Area

The main objective of this thesis is to assess the combined influences of specified reservoir conditions and operational parameters on the profitability of a geothermal project and on the potential for fault reactivation. The aim is to propose potential development strategies to maximize the profitability and minimize the potential for slip and...

An improved carbon dioxide thermodynamic model applied for reservoir simulation: Implementation of an improved thermodynamic model in Delft Advanced Terra Simulator (DARTS) and an investigation into the effects of impurities on gas plume behaviour

Geological storage of COኼ is a crucial and upcoming technology to reduce anthropogenic greenhouse gas emissions. Due to the buoyant characteristic of injected gas, the security of underground storage is a major concern. To asses the security of COኼ storage, an accurate prediction of the gas plume behaviour is essential. In this study, a fully...

Reservoir Simulation for Play-based Development of Low Enthalpy Geothermal Resources: Application to the Delft Sandstone

As implementation of deep geothermal energy projects in the Netherlands increases, reservoir simulation for these geothermal systems stands to play a key role in understanding how these systems will behave and how large scale projects can be optimised to save cost and reduce risk. In this thesis, an extensive simulation study has been conducted...

Pressure and Temperature Interference for Geothermal Projects in Dense Production Areas: A Case Study for the Delft Area

The main objective of this study is to quantify interference effects between production and injection wells for geothermal projects that operate within the same reservoir. The secondary objective is to study the time it takes for the reservoir unit to thermally recharge after production has stopped. Two reservoir simulators are benchmarked to...

Design of a cyborg NERF blaster for children with physical disabilities.: Using the abilities of children with physical disabilities, as inspiration, to create a toy that introduces new, desirable play features onto the regular toy market and thus supports inclusion

This graduation report aimed towards the vision „ Transform the needs of the minority into the wishes of the majority“. Children with physical disabilities face the issue to be excluded from the toy world of the able-bodied children. Toys with small buttons, heavyweight or the need of two hands for operating are examples which let children with...

Robust Algorithms for Discrete Tomography

Tomography methods concentrate on reconstructing objects from multiple projections that are obtained by sending, for example, X-rays through the object. Applications of these methods are, among others, radiology (CT-, MRI- and PET scans), geophysics and material science. The tomographic problems can be formulated as a system of linear equations....