Geophysical monitoring at the Ketzin pilot site for CO2 storage: New insights into the plume evolution
Geophysical monitoring at the Ketzin pilot site for CO2 storage: New insights into the plume evolution
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DOI：
10.1016/j.ijggc.2014.10.015
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发表时间：
2015
影响因子：
3.9
通讯作者：
M. Ivandic;C. Juhlin;S. Lüth;P. Bergmann;A. Kashubin;D. Sopher;A. Ivanova;G. Baumann;J. Henninges
中科院分区：
文献类型：
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作者：
M. Ivandic;C. Juhlin;S. Lüth;P. Bergmann;A. Kashubin;D. Sopher;A. Ivanova;G. Baumann;J. Henninges
迄今为止，Ketzin CO2 封存试验场的 3D 延时地震监测包括 2005 年进行的基线调查以及 2009 年和 2012 年进行的两次重复调查。在第一次重复调查（22-25 kt CO2）时，发现 CO2 羽流集中在注入井周围，最大横向范围约为 300-400 m，厚度为5–20 m。 2012 年调查数据（61 kt CO2）显示，振幅异常进一步增长和迁移，解释为 CO2 注入引起。该异常的形状与 2009 年调查获得的异常相似，但明显更强且更大，南北方向约 150 米，东西方向约 200 米。与 2009 年的调查一致，新数据显示羽流向西传播，这是由储层复杂结构控制的趋势。没有观察到覆盖层内地震特征发生系统变化的证据。对羽流的定量评估显示与注入量存在 15% 的差异，这可能归因于持续的溶解过程。然而，估计数量也存在很大的不确定性。
To date, 3D time-lapse seismic monitoring at the Ketzin CO2storage pilot site comprised a baseline survey conducted in 2005 and two repeat surveys conducted in 2009 and 2012. At the time of the first repeat survey (22–25 kt of CO2), the CO2plume was found to be concentrated around the injection well with a maximum lateral extent of approximately 300–400 m and a thickness of 5–20 m. Data from the 2012 survey (61 kt of CO2), show further growth and migration of the amplitude anomaly interpreted to be induced by the CO2injection. The anomaly is similar in shape to that obtained from the 2009 survey, but significantly stronger and larger by ∼150 m in the N–S direction and by ∼200 m in the E–W direction. In agreement with the 2009 survey, the new data show a westward propagation of the plume, a trend governed by the complexstructureof thereservoir. No evidence of systematic changes in the seismic signaturewithin the overburden is observed. A quantitative assessment of the plume reveals a 15% discrepancy with the injected amount, which could be attributed to the ongoing dissolution processes. However, the estimated quantity also contains significant uncertainty.