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Volumetrics of CO_2 Storage in Deep Saline Formations

机译：深盐层中CO_2的储存量

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摘要

Concern about the role of greenhouse gases in global climate change has generated interest in sequestering CO_2 from fossil-fuel combustion in deep saline formations. Pore space in these formations is initially filled with brine, and space to accommodate injected CO_2 must be generated by displacing brine, and to a lesser extent by compression of brine and rock. The formation volume required to store a given mass of CO_2 depends on the storage mechanism. We compare the equilibrium volumetric requirements of three end-member processes: CO_2 stored as a supercritical fluid (structural or stratigraphic trapping); CO_2 dissolved in pre-existing brine (solubility trapping); and CO_2 solubility enhanced by dissolution of calcite. For typical storage conditions, storing CO_2 by solubility trapping reduces the volume required to store the same amount of CO_2 by structural or stratigraphic trapping by about 50%. Accessibility of CO_2 to brine determines which storage mechanism (structural/stratigraphic versus solubility) dominates at a given time, which is a critical factor in evaluating CO_2 volumetric requirements and long-term storage security.
机译：对温室气体在全球气候变化中的作用的关注引起了人们对从深盐层中化石燃料燃烧中隔离CO_2的兴趣。这些地层中的孔隙空间最初充满了盐水，并且必须通过驱替盐水而在较小程度上通过压缩盐水和岩石来生成容纳注入的CO_2的空间。存储给定质量的CO_2所需的地层体积取决于存储机制。我们比较了三个末端过程的平衡体积要求：CO_2以超临界流体的形式存储（结构或地层圈闭）；将CO_2溶解在预先存在的盐水中（溶解性捕集）；方解石溶解提高了CO_2的溶解度。对于典型的存储条件，通过溶解度捕集来存储CO_2，通过结构或地层捕集来存储相同量的CO_2所需的体积减少了约50％。 CO_2与盐水的可及性决定了在给定时间占主导地位的存储机制（结构/地层对比溶解度），这是评估CO_2体积要求和长期存储安全性的关键因素。

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  • 来源
    《Environmental Science & Technology》 |2013年第1期|79-86|共8页
  • 作者

    Matthew Steele-MacInnis; Ryan M. Capobianco; Robert Dilmore; Angela Goodman; George Guthrie; J. Donald Rimstidt; Robert J. Bodnar;

  • 作者单位

    National Energy Technology Laboratory-Regional University Alliance (NETL-RUA), United States,Department of Geosriences, Virginia Tech, Blacksburg, Virginia 24061, United States;

    National Energy Technology Laboratory-Regional University Alliance (NETL-RUA), United States,Department of Geosriences, Virginia Tech, Blacksburg, Virginia 24061, United States;

    U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL), P.O. Box 10940, Pittsburgh, Pennsylvania 15236, United States;

    U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL), P.O. Box 10940, Pittsburgh, Pennsylvania 15236, United States;

    U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL), P.O. Box 10940, Pittsburgh, Pennsylvania 15236, United States;

    National Energy Technology Laboratory-Regional University Alliance (NETL-RUA), United States,Department of Geosriences, Virginia Tech, Blacksburg, Virginia 24061, United States;

    National Energy Technology Laboratory-Regional University Alliance (NETL-RUA), United States,Department of Geosriences, Virginia Tech, Blacksburg, Virginia 24061, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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