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首页> 外文会议>International Conference on Greenhouse Gas Control Technologies >ASSESSMENT OF THE CO_2 STORAGE POTENTIAL IN DEEP SALINE AQUIFERS (IN GERMANY)
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ASSESSMENT OF THE CO_2 STORAGE POTENTIAL IN DEEP SALINE AQUIFERS (IN GERMANY)

机译：评估深盐含水层中的CO_2储存潜力（德国）

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The CO_2 emissions from fossil fuel fired industrial installations > 20 MW thermal capacity (obliged to acquire CO_2 emission certificates) is about 500 Mt annually at present. Saline aquifers are likely to contribute most to the national CO_2 storage potential. Different approaches have been used for capacity estimates at various scales. In order to evaluate the aquifer storage option in relation to national climate protection goals it is necessary to know the total national storage capacity. On the other hand reliable capacity estimates for individual structures are required by the industry considering storage actual sites. However, at the different methods are affected by uncertainties resulting from geotechnical assumptions limited knowledge about geological variability. Values of national storage capacities, needed for energy and environmental political decisions can be regarded as cross estimates only. More reasonable estimates can be obtained from regional mapping using GIS. Knowledge of such estimates is important for state authorities and mining administrations that regulate and supervise the various activities making use of the deep underground space. Uncertainties arise from estimates about the fraction of traps that ensure safe storage or the definition and delineation of suitable traps, since there are too many structures to be investigated individually. The volumetric average gas saturation for individual structures or entire aquifers has to be determined by appropriate up-scaling methods that accurately represent the spatial integral of the sweep efficiency throughout the aquifer. In practice this is usually a matter of intuition though. Investment planning for CO_2 capture and storage projects requires reliable predictions, including uncertainty ranges for storage capacity. Such predictions require intensive site characterisation, taking into account local variations of aquifer properties. Reservoir models are used to simulate the effects of different CO_2 injection strategies and to predict sweep efficiencies. Regional studies have covered barely half of the area of sedimentary basins in Germany. Extrapolations of the gross national storage capacity based on different regional studies are within the same order of magnitude (10 to 40 Gt CO_2). In theory this capacity would be sufficient to take up the present CO_2 emissions of German fossil fuel fired power plants for 40 years at least.
机译：化石燃料燃烧工业设施的CO_2排放> 20 MW热容量（义务收购CO_2排放证书）目前约为500吨。盐水含水层可能为国家CO_2储存潜力做出贡献。不同的方法已被用于各种尺度的容量估计。为了评估与国家气候保护目标有关的含水层存储选项，有必要了解国家全国储存能力。另一方面，考虑储存实际站点，行业需要可靠的个人结构估计。然而，在不同的方法受到岩土假设有限的关于地质变异性的知识所产生的不确定性的影响。能源和环境政治决策所需的国家储存能力的价值只能被视为交叉估计数。可以使用GIS从区域映射获得更合理的估计。对这种估计的知识对于规范和监督利用深层地下空间的各种活动的国家当局和挖掘主管部门是重要的。从关于陷阱的一部分的估计产生不确定性，以确保安全存储或对合适陷阱的定义和描绘，因为有太多的结构要单独调查。各种结构或整个含水层的体积平均气体饱和度必须通过适当的上缩放方法来确定，可准确地代表整个含水层的扫描效率的空间积分。在实践中，这通常是一种直觉的问题。 CO_2捕获和存储项目的投资规划需要可靠的预测，包括存储容量的不确定性范围。这种预测需要密集的遗址表征，考虑到含水层属性的局部变化。储层模型用于模拟不同CO_2注射策略的影响和预测扫描效率。区域性研究在德国沉积盆地的一半勉强覆盖。基于不同区域研究的总体国家储存能力的外推是在同一级别（10至40 gt CO_2）的同一阶数。理论上，这种能力将足以占据德国化石燃料发电厂的目前的40年的CO_2排放。

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