Safety-based injection strategy for carbon dioxide geological sequestration in a deep saline aquifer with complex sandstone-shale sequences: A case study from Taiwan

Bieng Zih Hsieh, Cheng Yueh Wu, Chi Chung Tseng, Ta Lin Chen, Zsay Shing Lin

研究成果: Conference article同行評審

3 引文 斯高帕斯(Scopus)

摘要

The purpose of this study was to decide the best injection strategy for CO2 geo-sequestration in a deep saline aquifer with complex bedded sandstone-shale sequences. The best injection strategy is decided based on the estimates of the safety index (SFI). Numerical simulation method was used in this study. The major conclusions from this study are: (1) Safe trapping mechanisms contribute to a lower risk of CO2 leakage by trapping CO2 as immobile blobs or changing the phase of CO2 from supercritical phase to aqueous, ionic, and mineral phases in the post-injection period. (2) For an aquifer with complex sandstone-shale sequences, the best injection strategy should be decided by the results of risk evaluation and the SFI estimation. (3) The well location affected the injection strategy. The risk of CO2 leakage was lower using a down-dip injection well than an up-dip well. (4) The best strategy for this case study was to use the down-dip well to inject CO2 into the bottom sandstone layer. The SFI for this scenario reached 0.99 at the storage time of 1000 years, which meant that the probability of CO2 leakage occurring was nearly zero.

原文English
頁(從 - 到)4698-4711
頁數14
期刊Energy Procedia
37
DOIs
出版狀態Published - 2013
事件11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012 - Kyoto, Japan
持續時間: 2012 十一月 182012 十一月 22

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