| 房琦,吕俊文,彭国建.砂泥岩互层模型对CO2地质储存影响的数值模拟[J].南华大学学报(自然科学版),2016,30(4):16~20.[FANG Qi,Lü Jun-wen,PENG Guo-jian.Numerical Simulation on the Effect of Generalized Model of Sandstone and Mudstone Interlayers on CO2 Geological Storage[J].Journal of University of South China(Science and Technology),2016,30(4):16~20.] |
| 砂泥岩互层模型对CO2地质储存影响的数值模拟 |
| Numerical Simulation on the Effect of Generalized Model of Sandstone and Mudstone Interlayers on CO2 Geological Storage |
| 投稿时间：2016-04-13 |
| DOI： |
| 中文关键词: 砂泥岩互层 CO2地质储存 注入性 迁移性 封闭性 |
| 英文关键词:sandstone and mudstone interlayers CO2 geological storage injectivity migration containment |
| 基金项目:国家自然科学基金项目(11545016);南华大学博士科研启动基金资助项目(2014XQD12) |
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| 中文摘要: |
| 以江陵凹陷深部咸水层钻孔数据为例,通过构建不同砂泥岩互层概化模型,采用数值模拟的方法定量评价了砂泥岩互层对深部咸水层中CO2地质储存过程中注入性、迁移性和封闭性的影响,结果表明不同砂泥岩互层模型对CO2的注入性、迁移性和封闭性产生显著影响.CO2的注入量随着砂泥岩互层的增多变薄而降低,然而多而薄的砂泥岩互层可有效阻止CO2羽的上浮运动和横向迁移,从而提高空间利用率；CO2的封闭性随着砂泥岩互层的增多变薄而降低,对于多而薄的砂泥岩互层,较薄的泥岩隔层难以担当独立的封闭盖层,需要上覆有较厚的泥岩盖层以保证CO2地质储存的长期安全性.从注入性、迁移性和封闭性各方面来看,采用多级砂泥岩互层概化模型近似代表真实地层模型开展前期CO2地质储存的适宜性研究是可取的. |
| 英文摘要: |
| Multiple generalized models of different sandstone and mudstone interlayers were built and numerical simulations were carried out to estimate CO2 injectivity,migration and containment in deep saline formations under different sandstone and mudstone interlayers by taking the borehole data from Jiangling Depression for instance.Simulations results show that the sandstone and mudstone interlayers significantly influences CO2 injectivity,migration and containment.CO2 injection amount decreases with more and thinner sandstone and mudstone interlayers;however,more and thinner sandstone and mudstone interlayers could effectively prevent the upward and horizontal migration of CO2 plume and improve space use efficiency.CO2 containment decreases with more and thinner sandstone and mudstone interlayers.Since the thinner mudstone interlayer is difficult to be an independent caprock,a thick mudstone caprock is needed to ensure the long-term security of CO2 geological storage.What’s more,from the aspects of injectivity,migration and containment,it is advisable to adopt the generalized model of multiple sandstone and mudstone interlayers to approximately represent the actual stratigraphy model to carry out the early suitability assessment of CO2 geological storage. |
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