In-situ Durchlässigkeitsbestimmung von Deckgesteinsformationen zur Untertagelagerung von Kohlendioxid mittels Edelgasanalysen an Porenwässern frischer Bohrkernproben

利用新鲜岩心样品孔隙水的稀有气体分析，对地下二氧化碳封存的覆盖岩层的渗透率进行原位测定

• 批准号: 5393908
• 负责人: Dr. Johanna Lippmann-Pipke
• 金额: --
• 依托单位: Fachbereich 3.3 - Charakterisierung von Speicher- und Barrieregesteinen
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5393908?language=en
• 关键词: situ; Durchl; ssigkeitsbestimmung; von; Deckgesteinsformationen

Water originating from the ultra deep of the Earth's crust is extremely difficult and costly to sample, but its noble gas analysis enables to determine its subsurface residence time, to identify governing transport mechanism and mixing ratios. Such fundamental knowledge will significantly enhance our understanding in respect to the quantification of deep, long term, fluid flow on preferential pathways like fractures and faults, and its effects on geochemical cycles, like in example the mechanism enabling long term and continuous "supply of food" for early life forms in the deep subsurface. Within three new (A) or ongoing (B and C) international research projects such exceptional deep water samples are accessible: (A) Results of the pore water analysis from fresh cores drilled through cap and reservoir rock of envisaged subsurface CO2 sequestration sites have the potential to contribute to influence policymakers in respect to safe and long-term greenhouse gas emission reduction (e.g. the Frio Formation, TX, USA; in coop. with Prof. G. Born, GFZ Potsdam). (B) A one year pump test performed at the pilot hole of the KTB test site will provide for the first time such highest quality, uncontaminated fluids from an intersected water bearing fissure in about 4km depth (Continental Deep Drilling Project, Germany, in coop. with Prof. J. Erzinger, GFZ Potsdam). (C) First results from 18 fissure and pore water samples from the ultra deep South African gold mines (below 3km, in coop. with Prof. T.C. Onstott, Princeton Univ., USA; Prof. M. Stute and Prof. P. Schlosser, LDEO, Columbia Univ., USA) were recently summarzied (Lippmann et al., 2002) but more of such unique water samples are available or will be sampled throughout this year.

对来自地壳超深处的水进行取样是极其困难和昂贵的，但对其稀有气体的分析可以确定其地下停留时间，确定控制运输机制和混合比例。这些基础知识将大大提高我们对裂缝和断层等优先通道上深层、长期流体流动的定量理解，以及它对地球化学循环的影响，例如，为深部地下早期生命形式提供长期和持续“食物供应”的机制。在三个新的(A)或正在进行的（B和C）国际研究项目中，可以获得这种特殊的深水样本：(A)从设想的地下二氧化碳封存地点的盖层和储层岩石中钻取的新鲜岩心的孔隙水分析结果有可能有助于影响决策者在安全和长期温室气体减排方面的影响（例如，美国德克萨斯州的Frio地层；在coop中）。与波茨坦GFZ教授G. Born合作)。(B)在KTB试验场的试验孔进行的为期一年的泵试验将首次从约4公里深的相交含水裂缝中提供如此高质量、无污染的流体（德国大陆深层钻井项目，在coop中）。与波茨坦GFZ Erzinger教授合作)。(C)来自南非超深金矿（3公里以下）的18个裂隙和孔隙水样本的初步结果。与美国普林斯顿大学T.C. Onstott教授合作；M. Stute教授和P. Schlosser教授，LDEO，哥伦比亚大学，美国)最近进行了总结（Lippmann等人，2002年），但今年有更多这样独特的水样可供使用或将进行采样。