Analysis of alternative push–pull-test-designs for determining in situ residual trapping of carbon dioxide
Analysis of alternative push–pull-test-designs for determining in situ residual trapping of carbon dioxide
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DOI：
10.1016/j.ijggc.2014.05.008
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发表时间：
2014-08
影响因子：
3.9
通讯作者：
Kristina Rasmusson;M. Rasmusson;F. Fagerlund;J. Bensabat;Y. Tsang;A. Niemi
中科院分区：
文献类型：
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作者：
Kristina Rasmusson;M. Rasmusson;F. Fagerlund;J. Bensabat;Y. Tsang;A. Niemi
在深层咸水层中储存二氧化碳是一种很有前途的技术，可以减少温室气体直接排放到大气中。为了保证安全储存，需要对就地捕集机制进行表征，残余捕集是其中的一种。本研究旨在比较三种不同的单井二氧化碳推拉测试序列，以量化剩余气捕获的能力。这三个测试是基于Zhang等人（2011）提出的用于估计剩余气饱和度的测试顺序。一种新的替代方法，以创造残余气体条件的原位结合撤回和一种新的指示示踪剂的方法进行了研究。此外，对附近被动观测井的额外压力测量值进行了评估。采用带有EOS7C模块的iTOUGH2模拟器进行灵敏度分析和参数估计。结果表明，指标示踪法可以在不增加sgr估计不确定度的情况下创造剩余条件。来自被动观测井的额外压力测量将减少估算的不确定性。研究结果可用于开发现场实验，以进行现场表征。
Carbon dioxide storage in deep saline aquifers is a promising technique to reduce direct emissions of greenhouse gas to the atmosphere. To ensure safe storage the in situ trapping mechanisms, residual trapping being one of them, need to be characterized. This study aims to compare three alternative single-well carbon dioxide push–pull test sequences for their ability to quantify residual gas trapping. The three tests are based on the proposed test sequence by Zhang et al. (2011) for estimating residual gas saturation. A new alternative way to create residual gas conditions in situ incorporating withdrawal and a novel indicator-tracer approach has been investigated. Further the value of additional pressure measurements from a nearby passive observation well was evaluated. The iTOUGH2 simulator with the EOS7C module was used for sensitivity analysis and parameter estimation. Results show that the indicator-tracer approach could be used to create residual conditions without increasing estimation uncertainty ofSgr. Additional pressure measurements from a passive observation well would reduce the uncertainty in theSgrestimate. The findings of the study can be used to develop field experiments for site characterization.