• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Greenhouse Gas Control >Long-term variations of CO_2 trapped in different mechanisms in deep saline formations: A case study of the Songliao China
【24h】

Long-term variations of CO_2 trapped in different mechanisms in deep saline formations: A case study of the Songliao China

机译：深层盐分形成机理中CO_2的长期捕获变化-以松辽中国为例

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The geological storage of CO_2 in deep saline formations is increasing seen as a viable strategy to reduce the release of greenhouse gases to the atmosphere. There are numerous sedimentary basins in China, in which a number of suitable CO_2 geologic reservoirs are potentially available. To identify the multi-phase processes, geochemical changes and mineral alteration, and CO_2 trapping mechanisms after CO_2 injection, reactive geochemical transport simulations using a simple 2D model were performed.Mineralogical composition and water chemistry from a deep saline formation of Songliao Basin were used. Results indicate that different storage forms of CO_2 vary with time. In the CO_2 injection period, a large amount of CO_2 remains as a free supercritical phase (gas trapping), and the amount dissolved in the formation water (solubility trapping) gradually increases. Later, gas trapping decrease, solubility trapping increases significantly due to the migration and diffusion of CO_2 plume and the convective mixing between CO_2-saturated water and unsaturated water, and the amount trapped by carbonate minerals increases gradually with time. The residual CO_2 gas keeps dissolving into groundwater and precipitating carbonate minerals. For the Songliao Basin sandstone, variations in the reaction rate and abundance of chlorite, and plagioclase composition affect significantly the estimates of mineral alteration and CO_2 storage in different trapping mechanisms. The effect of vertical permeability and residual gas saturation on the overall storage is smaller compared to the geochemical factors. However, they can affect the spatial distribution of the injected CO_2 in the formations. The CO_2 mineral trapping capacity could be in the order of 10 kg/m~3 medium for the Songliao Basin sandstone, and may be higher depending on the composition of primary alumino-silicate minerals especially the content of Ga, Mg, and Fe.
机译：在深层盐水层中CO_2的地质存储正在增加，这被视为减少温室气体向大气中释放的可行策略。中国有许多沉积盆地，其中可能有许多合适的CO_2地质储层。为了确定注入CO_2后的多相过程，地球化学变化和矿物蚀变以及CO_2的捕集机理，采用简单的二维模型进行了反应性地球化学运移模拟，并采用了松辽盆地深层盐分的矿物学组成和水化学。结果表明，不同的CO_2储存形式随时间变化。在CO_2注入期，大量的CO_2保留为游离的超临界相（捕集气体），并且溶解在地层水中的量（溶解度捕集）逐渐增加。后来，由于CO_2羽流的迁移和扩散以及CO_2饱和水与不饱和水之间的对流混合，气体捕集减少，溶解度捕集显着增加，碳酸盐矿物的捕集量随时间逐渐增加。残留的CO_2气体不断溶解到地下水中并沉淀出碳酸盐矿物。对于松辽盆地砂岩，反应速率和亚氯酸盐丰度的变化以及斜长石组成的变化会显着影响不同捕集机制中矿物蚀变和CO_2储量的估算。与地球化学因素相比，垂直渗透率和剩余气体饱和度对整体存储的影响较小。但是，它们会影响注入的CO_2在地层中的空间分布。对于松辽盆地砂岩，CO_2矿物的捕集能力约为10 kg / m〜3中等，并且取决于主要的铝硅酸盐矿物的组成，尤其是Ga，Mg和Fe的含量，可能更高。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号