Abstract

Carbon dioxide sequestration is one of the most potent ways to offset global warming. Deep saline aquifers are one of the prime targets for carbon dioxide sequestration, among several storage media. Here, a reservoir simulation study was conducted on a repository – a deep saline aquifer to store carbon dioxide. The basis of the study was to evaluate the fluid flow and heat transfer mechanisms under non-isothermal conditions. Different mass and heat transfer mechanisms were studied, and diffusion and conduction were found to have profound effects on the fate of CO₂. Plume height was varied along with reservoir geometry to determine their effects on the spread of the plume. Both reservoir geometry and permeability anisotropy were found to impact the plume shape. The results show that changing the reservoir geometry changed the fate of CO₂. When the reservoir was made wider, solubility trapping prevailed. In contrast, when reservoir length was narrowed, residual and capillary trapping took over. Cost analysis considering a single well of the Ketzin site, Germany, was carried out to add to the existing database, along with source–sink matching.

摘要

Carbon dioxide sequestration is one of the most potent ways to offset global warming. Deep saline aquifers are one of the prime targets for carbon dioxide sequestration, among several storage media. Here, a reservoir simulation study was conducted on a repository – a deep saline aquifer to store carbon dioxide. The basis of the study was to evaluate the fluid flow and heat transfer mechanisms under non-isothermal conditions. Different mass and heat transfer mechanisms were studied, and diffusion and conduction were found to have profound effects on the fate of CO₂。羽流高度随储层几何形状的变化而变化，以确定它们对羽流传播的影响。发现储层的几何形状和渗透率各向异性都会影响羽状体的形状。结果表明，改变储层几何形状改变了CO ₂的命运。当储层变宽时，溶解性捕集便占了上风。相反，当储层长度变窄时，残留的和毛细管的捕集就会被接管。考虑到德国Ketzin站点的一口井，进行了成本分析，并将其添加到现有数据库中，同时进行了源库匹配。