Development of a hybrid process and system model for the assessment of wellbore leakage at a geologic CO2 sequestration site.
Development of a hybrid process and system model for the assessment of wellbore leakage at a geologic CO2 sequestration site.
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DOI：
10.1021/es800417x
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发表时间：
2008-08
影响因子：
11.4
通讯作者：
H. Viswanathan;R. Pawar;P. Stauffer;J. Kaszuba;J. Carey;S. Olsen;G. Keating;D. Kavetski;G. Guthrie
中科院分区：
文献类型：
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作者：
H. Viswanathan;R. Pawar;P. Stauffer;J. Kaszuba;J. Carey;S. Olsen;G. Keating;D. Kavetski;G. Guthrie
在地质储层中封存二氧化碳是目前正在探索的减少人为二氧化碳排放的有前途的技术之一。大规模部署地质封存每年需要封存面积累计达数百平方公里，并需要大量封存场地。我们正在开发一个系统级模型 CO2-PENS，它将预测封存系统的整体性能，同时考虑与封存操作的不同部分相关的各种过程，从发电厂到封存水库再到可进入的环境。 CO2-PENS 的适应性促进了其在各种场所的应用，并且随着详细的场所信息的出现，其复杂程度也会增加。 CO2-PENS 模型通过集成来自过程级实验室实验、现场实验/观察和过程级数值建模的信息，采用基于科学的预测方法。 CO2-PENS 系统模型中耦合过程模型的使用提供了对聚合过程的突发行为的洞察，这是使用单独过程模型无法获得的。我们通过将地质和井眼数据合并到合成的贫油油藏中来说明该概念的实用性。在这种封存情景中，我们通过井眼释放以及二氧化碳对浅层含水层和释放到大气中的影响来评估二氧化碳的命运。
Sequestration of CO2 in geologic reservoirs is one of the promising technologies currently being explored to mitigate anthropogenic CO2 emissions. Large-scale deployment of geologic sequestration will require seals with a cumulative area amounting to hundreds of square kilometers per year and will require a large number of sequestration sites. We are developing a system-level model, CO2-PENS, that will predict the overall performance of sequestration systems while taking into account various processes associated with different parts of a sequestration operation, from the power plant to sequestration reservoirs to the accessible environment. The adaptability of CO2-PENS promotes application to a wide variety of sites, and its level of complexity can be increased as detailed site information becomes available. The model CO2-PENS utilizes a science-based-prediction approach by integrating information from process-level laboratory experiments, field experiments/observations, and process-level numerical modeling. The use of coupled process models in the system model of CO2-PENS provides insights into the emergent behavior of aggregate processes that could not be obtained by using individual process models. We illustrate the utility of the concept by incorporating geologic and wellbore data into a synthetic, depleted oil reservoir. In this sequestration scenario, we assess the fate of CO2 via wellbore release and resulting impacts of CO2 to a shallow aquifer and release to the atmosphere.