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A Method of Fundamental Solutions in Poroelasticity to Model the Stress Field in Geothermal Reservoirs

  • Book
  • © 2015

Overview

Authors:
  1. Matthias Albert Augustin

    1. AG Geomathematik, Technische Universität Kaiserslautern, Kaiserslautern, Germany

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  • First approach to use a method of fundamental solutions for a coupled system of PDEs of different types, in particular a vector-valued elliptic one and a scalar-valued one of Sobolev-evolution type
  • Progress in deep geothermics
  • New methods in 3D numerics for poroelasticity
  • Includes supplementary material: sn.pub/extras

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Table of contents (7 chapters)

  1. Front Matter

    Pages i-xii
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  2. Introduction

    • Matthias Albert Augustin
    Pages 1-9

  3. Preliminaries

    • Matthias Albert Augustin
    Pages 11-38

  4. Physical and Mathematical Foundation

    • Matthias Albert Augustin
    Pages 39-63

  5. Boundary Layer Potentials in Poroelasticity

    • Matthias Albert Augustin
    Pages 65-90

  6. Methods of Fundamental Solutions in Poroelasticity

    • Matthias Albert Augustin
    Pages 91-114

  7. Numerical Results

    • Matthias Albert Augustin
    Pages 115-208

  8. Conclusion and Outlook

    • Matthias Albert Augustin
    Pages 209-218

  9. Back Matter

    Pages 219-235
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Keywords

About this book

This monograph focuses on the numerical methods needed in the context of developing a reliable simulation tool to promote the use of renewable energy. One very promising source of energy is the heat stored in the Earth’s crust, which is harnessed by so-called geothermal facilities. Scientists from fields like geology, geo-engineering, geophysics and especially geomathematics are called upon to help make geothermics a reliable and safe energy production method. One of the challenges they face involves modeling the mechanical stresses at work in a reservoir.
The aim of this thesis is to develop a numerical solution scheme by means of which the fluid pressure and rock stresses in a geothermal reservoir can be determined prior to well drilling and during production. For this purpose, the method should (i) include poroelastic effects, (ii) provide a means of including thermoelastic effects, (iii) be inexpensive in terms of memory and computational power, and (iv) be flexible with regard to the locations of data points.
After introducing the basic equations and their relations to more familiar ones (the heat equation, Stokes equations, Cauchy-Navier equation), the “method of fundamental solutions” and its potential value concerning our task are discussed. Based on the properties of the fundamental solutions, theoretical results are established and numerical examples of stress field simulations are presented to assess the method’s performance. The first-ever 3D graphics calculated for these topics, which neither requiring meshing of the domain nor involving a time-stepping scheme, make this a pioneering volume.

Authors and Affiliations

  • AG Geomathematik, Technische Universität Kaiserslautern, Kaiserslautern, Germany

    Matthias Albert Augustin

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