14 Works

Uncertainty Quantification for Geothermal Basin- and Reservoir-Scale Applications

Denise Degen, Mauro Cacace, Magdalena Scheck-Wenderoth, Karen Veroy & Florian Wellmann
Numerical simulations of the governing geophysical processes are crucial for geothermal applications in order to characterize the subsurface. This characterization presents us with major challenges ranging from the correct physical and geometrical characterization to the quantification of uncertainties. Quantifying rock physics uncertainties and performing other probabilistic inverse methods is, even with current state-of-the-art finite element solver and high-performance infrastructures, computationally not feasible for complex basin- and reservoir-scale geothermal applications due to the large spatial, temporal,...

Structure and density configuration of Germany’s subsurface: 3-D-Deutschland, an updated three-dimensional lithospheric-scale model

Denis Anikiev , Judith Bott , Mauro Cacace , Hans-Jürgen Götze & Magdalena Scheck-Wenderoth
With this study we revise and improve the three-dimensional lithospheric-scale structural and density model of Germany (3-D-D). Major shortcomings of this model resulted from joining three regional 3-D models that were poorly covered by data at their margins. Merging into a larger model revealed structural inconsistencies in these “marginal” domains. In order to resolve discrepancies between the units in a more consistent way we integrate newly available data from seismic reprocessing, tomography, and use 3-D...

Experimental investigation of hydrogen storage and transport properties in reservoir rocks under the influence of abiotic chemical reactions, microbial metabolism, and \"in-situ\" pressures.

Nicolai Thüns, Garri Gaus , Ralf Littke & Helge Stanjek
RWTH Aachen, Clay and Interface Mineralogy(1);RWTH Aachen, Institute for Geology and Geochemistry of Petroleum and Coal(2);Temporary underground storage of molecular hydrogen (H2) in depleted oil and gas reservoirs has recently attracted increasing research interest as it can support chemical industry demands and peak-shaving in the energy supply grid. Experimental parameters related to abiotic chemical reactions, microbial metabolism, and transport mechanisms of molecular hydrogen under elevated pressure conditions in such reservoirs are of potential relevance to...

Hydro-Mechanical Simulation in Geothermal Reservoirs: Physics and Surrogate Modeling

Ryan Santoso , Denise Degen , Mauro Cacace & Florian Wellmann
Hydro-mechanical (HM) simulations are essential aspects of geothermal reservoir studies to assess the heat production and the associated-environmental impacts, such as seismicity. HM simulations are numerically expensive (especially for large-scale simulations) since they require a relatively fine mesh to capture the complex interplay between the fluid-flow and geomechanical processes. This aspect makes it difficult to perform detailed studies on uncertainties in HM simulations. In this work, we present a comprehensive review and numerical demonstrations about...

Closely-spaced carbonate replacement veins: the influence of external stress on focused fluid flow during carbonation of peridotite

Manuel D. Menzel , Janos L. Urai & Estibalitz Ukar
The reaction of serpentinized peridotites with CO2-bearing fluids to listvenite (quartz-carbonate rocks) requires massive fluid flux and maintained permeability despite volume increase. Here we investigate listvenites and serpentinites samples from Hole BT1B of the Oman Drilling Project to improve our understanding of the mechanisms and feedbacks of fracturing and vein formation during peridotite carbonation. The samples are characterized by a high abundance of magnesite veins which are often bundled into closely-spaced, parallel sets. Relative cross-cutting...

Alpine lithospheric strength and its relation to seismicity distribution

Cameron Spooner, Magdalena Scheck-Wenderoth & Mauro Cacace
GFZ Potsdam, Germany (1); Potsdam University, Germany (2); RWTH Aachen University, Germany (3)

Despite the amount of research focused on the Alpine orogen, different hypotheses still exist regarding varying seismicity distribution patterns throughout the numerous crustal blocks of different physical properties that comprise the region. The thermal field, also varying as a consequence of heterogeneous lithospheric properties, is a key controlling factor for rock strength via thermally activated creep and it exerts a first...

Modelling of fault slip: beyond Mohr-Coulomb?

Mauro Cacace, Guido Blöcher, Antoine B. Jacquey, Hannes Hofmann, Arno Zang , Günter Zimmermann, Oliver Heidbach, Christian Kluge & Magdalena Scheck-Wenderoth
GFZ, German Research Centre for Geosciences, Potsdam, Germany (1); MIT, Massachussets Institute of Technology, Cambridge, MA, USA (2); RWTH Aachen University, Aachen, Germany (3)

In this study, we carry out an evaluation of the potential for induced seismicity arising from hydraulic stimulation of low to intermediate enthalpy porous reservoirs, by taking the geothermal reservoir of Groß Schönebeck (northern Germany) as study case. The aim is to evaluate the spatial and temporal distribution of 26...

Short-term terrestrial climate variability through MIS 3 and Termination 1

Daniel. Veres
Marine Isotope Stage (MIS) 3 represents a critical interval for understading the response of terretrial environments to rapid climate change driven by orbital focring. As the primary constituent of loess and a major driver in global climate forcing, mineral dust serves as a proxy that allows for direct comparison of loess data with chronologically better resolved ice and lake records. Motivated by the recent emergence of high-resolution magnetic and sedimentological data on European loess-paleosol profiles,...

Geothermal Reservoir Characterisation and Probability Analysis of Fractured Media at Grimsel Test Site, Switzerland

Selvican Türkdogan & Peter Achtziger
Exploitation of deep geothermal energy is considered as one of the most efficient renewable energy applications. In this sense, reservoir stimulation is established to extract geothermal energy from EGS (Enhanced Geothermal System) which is highly dependent on its in-situ structural properties: damage/shear zones, faults, fractures, its statistics and characteristics. In more detail, damage zones may behave like a conduit providing preferential pathways for fluid flow in otherwise impermeable rock such as granite or gneiss. To...

Probabilistic Machine Learning for improved Decision-making with 3-D Geological Models

Florian Wellmann , Miguel de la Varga , Nilgün Güdük , Jan von Harten , Fabian Stamm , Zhouji Liang & s.Mohammad Moulaeifard
Geological models, as 3-D representations of subsurface structures, can be combined with gravity inversions to obtain geometric representations of geological objects with similar porperty distributions. These models are built on prior assumptions and imperfect information, and they often result from an integration of geological and geophysical data types with varying quality. These aspects result in uncertainties about the predicted subsurface structures and property distributions, which will affect the subsequent decision process. We discuss approaches to...

Hydrocarbon Migration and its Implications for Hydrocarbon Exploration and Charge Risk Assessment: Case Studies from the Persian Gulf, Iran

Alireza Baniasad & Ralf Littke
Historically, basin and petroleum system modeling has mainly focused on understanding the burial and thermal history of sedimentary rocks as well as related hydrocarbon generation from kerogen (sedimentary organic matter) in source rocks; much less studies treated hydrocarbon migration and accumulation in great detail, although it is of uttermost importance for petroleum exploration and production. New 2D and 3D basin models in different parts of the Persian Gulf indicate the variable complexity of hydrocarbon migration...

Open-source and open data: combining both worlds for optimised decision making in geological subsurface models

Florian Wellmann , Miguel de la Varga & Alexander Jüstel
Computational Geoscience and Reservoir Engineering (CGRE), RWTH Aachen University, Aachen, Germany(1);Terranigma Solutions GmbH, Aachen, Germany(2);Fraunhofer IEG, Fraunhofer Research Institution for Energy Infrastructures and Geothermal Systems, Am Hochschulcampus 1, 44801 Bochum, Germany(3);

A Heat Demand Map of North-West Europe - its impact on supply areas and identification of potential production areas for deep geothermal energy

Eileen Herbst , Elias Khashfe , Alexander Jüstel , Frank Strozyk & Peter Kukla
To achieve the Paris Agreement's goal of maximum global warming by 2 degrees, CO2 reduction is indispensable. Space heating for residential, service and industrial buildings amounts to 26% of EU's final energy consumption with about 3347 TWh/a. Approximately 75% of the heat produced is generated by fossil fuels with high CO2 emissions. Those Emissions can be reduced by implementation of renewable energy sources, such as deep geothermal energy. As Part of the Interreg NWE project...

Bias evaluated structural and probabilistic subsurface modelling: a case study of the Münsterland Basin, NW Germany

Marius Pischke , Alexander Magnus Jüstel , Frank Strozyk, Peter Kukla & Florian Wellmann
The analysis of uncertainties in the description of the subsurface is an important aspect for resource exploration and material storage. Because of the complexity of the subsurface and an often inhomogeneous data situation, models exhibit several aspects of uncertainties. These may be caused by the interpolation of locally sparse data and must be considered when constraining a structural geological model. Further, these interpolations may be subject to errors caused by psychological biases, which need to...

Registration Year

  • 2022
    12
  • 2021
    2

Resource Types

  • Text
    14

Affiliations

  • RWTH Aachen University
    13
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    5
  • Fraunhofer Research Institution for Energy Infrastructures and Geothermal Systems
    3
  • The University of Texas at Austin
    1
  • Eindhoven University of Technology
    1
  • University of Potsdam
    1
  • Massachusetts Institute of Technology
    1
  • Kiel University
    1
  • RWTH Aachen University-
    1
  • ETH Zurich
    1