| 张倩,张毅,芦迪,郦泽嵘.CO2地质封存过程中传热特性研究[J].,2019,59(5):467-470 |
| CO2地质封存过程中传热特性研究 |
| Study of heat transfer characteristic of CO2 during geological sequestration |
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| DOI：10.7511/dllgxb201905005 |
| 中文关键词: 碳捕集与封存 热力学模型 数值模拟 焦耳-汤姆孙效应 |
| 英文关键词: carbon capture and storage thermodynamic model numerical simulation Joule-Thomson effect |
| 基金项目:“十三五”国家重点研发计划资助项目(2016YFB0600804). |
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| 中文摘要: |
| 碳捕集与封存(CCS)技术使得大规模减少CO2排放变得可行，充分预测CO2的状态对于实际工程安全有效开展是十分必要的．现有模型普遍将本应为整体系统的井筒注入和咸水层封存视为两个单独的阶段，通过建立一个井筒注入与咸水层封存的联合模型对储层中流体传热过程进行模拟，分析不同注入条件对于CO2在整体封存过程中传热特性的影响．研究表明，焦耳-汤姆孙效应、地层温度及井筒热阻是影响流体温度的主要原因，流体温度会影响冷却域范围以及最低温度出现的径向位置，高温或低压注入会抑制焦耳-汤姆孙效应． |
| 英文摘要: |
| Carbon capture and storage (CCS) is a feasible technique to reduce carbon dioxide emissions, which can be used in the practical project. It′s extremely important to understand the thermal properties of CO2 for the safe and effective implementation of project. In previous research, the wellbore injection and storage into saline which should be an integrated system are modeled as two independent stages. A united wellbore injection-saline aquifer storage model is proposed to simulate the heat transfer of fluid in the reservoir and analyze the effect of different injection conditions on the heat transfer characteristic of CO2 in the whole storage process. It is shown that the Joule-Thomson effect, the formation temperature and the wellbore thermal resistance are the key reasons to affect the fluid temperature. The fluid temperature has an influence on the spatial extent of cooling and the radial location where the minimum temperature occurs. During the injection process, higher temperature and lower pressure may suppress the Joule-Thomson effect. |
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