Three-dimensional analysis of coupled thermohaline flow and reactive transport in fractured geothermal reservoirs

裂缝性地热储层温盐流与反应输运耦合的三维分析

基本信息

项目摘要

Studying coupled 3D thermohaline flow and reactive transport in fractured materials is important in the context of estimating lifetime and efficiency of geothermal reservoirs. Thermal energy extraction with the common Hot Dry Rock method will lead to steep gradients of water temperature, water density and presumably solute concentration. As a result, chemical reactions (precipitation/dissolution) and a modification of the flow regime due to coupled thermal-solutal (“thermohaline”) flow is expected to occur in the 3D fractured reservoir. To date, a number of coupled geoprocesses in the 3D subsurface have not yet been investigated. These include, amongst others, thermohaline flow in fractured rock, 3D variable-density flow in fractured rock, and the effect of reactive transport on geothermal reservoir efficiency. In particular, this project will focus on (i) the study of viscosity-effects on variable-density flow in porous and fractured-porous reservoirs, (ii) the impact of chemical reactions on geothermal reservoir efficiency, (iii) the study of variable-density flow in 3D fractured reservoirs, (iv) thermohaline (“double-diffusive”) convection in fractured geothermal reservoirs, (v) the transient analysis of thermohaline flow in porous media, and (vi) the efficient representation of complex 3D fracture networks in a finite-element mesh of variable topography and inclined hydrogeological units. The goal of this project is to provide adapted and efficient modelling tools to theoretically examine coupled processes. Numerical models are useful tools because systems of high complexity can be studied, which is difficult and sometimes impossible in field or laboratory experiments. The results of this project will (i) yield fundamental knowledge on the above mentioned coupled geoprocesses in 3D fractured rock as well as their interaction, (ii) assist in the identification of important processes relevant for the long-term operation of georeservoirs, (iii) help to identify the relevant parameters, (iv) provide adapted tools for the long-term prediction of reservoir productivity and efficiency, and (v) help to estimate the relative importance of individual coupled processes.
研究裂缝性物质中三维热盐流动与反应输运的耦合关系,对于估算地热储层的寿命和效率具有重要意义。用普通的热干岩法提取热能会导致水温、水密度和可能的溶质浓度的陡峭梯度。因此,化学反应(沉淀/溶解)和由于热溶质(“热盐”)耦合流动而导致的流动形式的改变预计会在三维裂缝性储层中发生。迄今为止,尚未对三维地下的一些耦合地质过程进行研究。其中包括裂缝性岩石中的热盐流动、裂缝性岩石中的三维变密度流动以及反应输运对地热储层效率的影响。特别是,该项目将重点研究(i)多孔和缝状多孔储层中粘度对变密度流动的影响,(ii)化学反应对地热储层效率的影响,(iii)三维裂缝性储层中变密度流动的研究,(iv)裂缝性地热储层中的热盐(“双扩散”)对流,(v)多孔介质中热盐流动的瞬态分析。(vi)在可变地形和倾斜水文地质单元的有限元网格中有效地表示复杂的3D裂缝网络。这个项目的目标是提供适应和有效的建模工具,从理论上检查耦合过程。数值模型是有用的工具,因为可以研究高度复杂的系统,这在现场或实验室实验中是困难的,有时是不可能的。该项目的结果将(i)提供有关上述三维裂缝岩石耦合地质过程及其相互作用的基本知识,(ii)有助于识别与地质油藏长期运行相关的重要过程,(iii)有助于确定相关参数,(iv)为油藏产能和效率的长期预测提供适应的工具,(v)有助于估计单个耦合过程的相对重要性。

项目成果

期刊论文数量(11)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Non-iterative adaptive time-stepping scheme with temporal truncation error control for simulating variable-density flow
  • DOI:
    10.1016/j.advwatres.2012.07.021
  • 发表时间:
    2012-12
  • 期刊:
  • 影响因子:
    4.7
  • 作者:
    E. Hirthe;T. Graf
  • 通讯作者:
    E. Hirthe;T. Graf
Assessing the saltwater remediation potential of a three-dimensional, heterogeneous, coastal aquifer system
评估三维、异质、沿海含水层系统的咸水修复潜力
  • DOI:
    10.1007/s12665-014-3253-2
  • 发表时间:
    2014
  • 期刊:
  • 影响因子:
    2.8
  • 作者:
    Walther M;Bilke L;Delfs J.-O;Graf T;Grundmann J;Kolditz O;Liedl R.
  • 通讯作者:
    Liedl R.
Impact of topography on groundwater salinization due to ocean surge inundation
  • DOI:
    10.1002/2016wr018814
  • 发表时间:
    2016-08
  • 期刊:
  • 影响因子:
    5.4
  • 作者:
    Xuan Yu;Jie Yang;T. Graf;Mohammad Koneshloo;M. O'Neal;H. Michael
  • 通讯作者:
    Xuan Yu;Jie Yang;T. Graf;Mohammad Koneshloo;M. O'Neal;H. Michael
Seawater intrusion in fractured coastal aquifers: A preliminary numerical investigation using a fractured Henry problem
  • DOI:
    10.1016/j.advwatres.2015.09.013
  • 发表时间:
    2015-11
  • 期刊:
  • 影响因子:
    4.7
  • 作者:
    M. Sebben;A. Werner;T. Graf
  • 通讯作者:
    M. Sebben;A. Werner;T. Graf
Impact of fracture network geometry on free convective flow patterns
裂缝网络几何形状对自由对流流动模式的影响
  • DOI:
    10.1016/j.advwatres.2014.06.001
  • 发表时间:
    2014
  • 期刊:
  • 影响因子:
    4.7
  • 作者:
    Vujevic´ K;Graf T;Simmons C.T;Werner A.D.
  • 通讯作者:
    Werner A.D.
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Professor Dr. Thomas Graf其他文献

Professor Dr. Thomas Graf的其他文献

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{{ truncateString('Professor Dr. Thomas Graf', 18)}}的其他基金

Fabrication of sesquioxide (Yb:Lu2O3 and Yb:LuScO3) laser materials and their applications in high power ultrafast Thin-disk lasERs (“LuThER”)
三氧化物(Yb:Lu2O3 和 Yb:LuScO3)激光材料的制备及其在高功率超快薄盘激光器(“LuThER”)中的应用
  • 批准号:
    410806665
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Dynamic beam modulation for optimization of industrial laser processes (FastShape)
用于优化工业激光工艺的动态光束调制 (FastShape)
  • 批准号:
    426328417
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants (Transfer Project)
Enhancement of understanding about electron beam deep welding processes by making use of real-time - Polarisation intensity quotient goniometry of the vapour capillary with a special view to functional connections of the weld pool dynamics
通过利用蒸汽毛细管的实时极化强度商测角法,特别关注焊池动力学的功能连接,增强对电子束深焊接工艺的理解
  • 批准号:
    278796746
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Energy transport mechanisms and their impact on the matrix damage during pulsed laser processing of carbon fiber reinforced plastics
碳纤维增强塑料脉冲激光加工过程中的能量传输机制及其对基体损伤的影响
  • 批准号:
    262128969
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Tribosystems for cold forming processes based on volatile lubricants and laser structured surfaces
基于挥发性润滑剂和激光结构化表面的冷成型工艺摩擦系统
  • 批准号:
    282210782
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Control systems for adaptive optical systems in high power laser resonators
高功率激光谐振腔自适应光学系统的控制系统
  • 批准号:
    257920601
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Tribosystems for cold forming processes based on volatile lubricants and laser structured surfaces
基于挥发性润滑剂和激光结构化表面的冷成型工艺摩擦系统
  • 批准号:
    244842169
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Thin-disk laser for muonic atoms spectroscopy
用于μ子原子光谱的薄盘激光器
  • 批准号:
    209386059
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Grundlagenuntersuchungen zur Engergieeinkopplung beim Mikrobohren mit Laserstrahlung
激光辐射微钻孔过程中能量耦合的基础研究
  • 批准号:
    115240741
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Überwindung begrenzender Faktoren beim Schweißen mit Lasern hoher Strahlqualität und Leistung
克服使用高光束质量和功率的激光器进行焊接时的限制因素
  • 批准号:
    27009606
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

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