Quantification of CO2 Mineralization at the Wallula Basalt Pilot Project.
Quantification of CO2 Mineralization at the Wallula Basalt Pilot Project.
复制标题
瓦卢拉玄武岩试点项目中二氧化碳矿化的量化。
DOI：
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发表时间：
2020
影响因子：
11.4
通讯作者：
B. McGrail
中科院分区：
文献类型：
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作者：
S. White;F. Spane;H. Schaef;Quin R. S. Miller;M. White;J. Horner;B. McGrail
2013年，太平洋西北国家实验室领导了一项地质碳封存现场示范，将约1000吨二氧化碳注入华盛顿Wallula附近的几个深哥伦比亚河玄武岩区。注入CO2两年后从注入区提取的岩芯样本显示了新生碳酸盐矿化作用，这在定性上与实验室实验和反应迁移模型的预期一致。在这里，我们报告了对2012年注入前和2015年注入后水文测试的新的详细分析，该测试利用scCO2和水之间的流体性质差异来评估近场，井筒和储层条件的变化，这些变化在注入结束后大约两年明显。这种对比水文试验分析方法提供了一种新的方法来量化注入的CO2在现场试验中矿化的量。模拟结果表明，大约60%的注入CO2在两年内通过矿化作用被隔离，由此产生的碳酸盐占据了约4%的可用储层孔隙空间。本文提出的方法提供了一种新的监测工具，以评估注入化学反应性玄武岩地层的CO2的命运，但也可以适用于更传统的地下碳储存储层内的长期监测和验证。
In 2013, Pacific Northwest National Laboratory led a geologic carbon sequestration field demonstration where ~1000 tonnes of CO2 were injected into several deep Columbia River Basalt zones near Wallula, Washington. Rock core samples extracted from the injection zone two years after CO2 injection revealed nascent carbonate mineralization that was qualitatively consistent with expectations from laboratory experiments and reactive transport modeling. Here, we report on a new detailed analysis of the 2012 pre-injection and 2015 post-injection hydrologic tests that capitalizes on the difference in fluid properties between scCO2 and water to assess changes in near-field, wellbore and reservoir conditions that are apparent approximately two years following the end of injection. This comparative hydrologic test analysis method provides a new way to quantify the amount of injected CO2 that was mineralized in the field test. Modeling results indicate that approximately 60% of the injected CO2 was sequestered via mineralization within two years, with the resulting carbonates occupying ~4% of the available reservoir pore space. The method presented here provides a new monitoring tool to assess the fate of CO2 injected into chemically reactive basalt formations but could also be adapted for long-term monitoring and verification within more traditional subsurface carbon storage reservoirs.