江汉盆地江陵凹陷二氧化碳地质封存数值模拟

Numerical Simulation on Geological Storage of Carbon Dioxide in Jiangling Depression,Jianghan Basin,China

通过建立江汉盆地江陵凹陷新沟嘴组储层和盖层的二维模型,对江陵凹陷进行了CO2地质封存数值模拟研究,分析了注入CO2的运移分布和溶解扩散情况,并对储盖层垂直方向的渗透率进行了敏感性分析。结果表明,所建的二维模型能够较好地描述CO2在储层中的运移过程和分布状况,而且在实际地质封存工作中必须要考虑一些地质上的因素如储盖层的渗透率、毛细管压力、岩石矿物组分丰度等的变化对封存效果的影响。

Research on the CO2 geological storage technology is carried out in many countries as a viable strategy to reduce the anthropogenic emission of greenhouse gases into the atmosphere. With the establishment of the two-dimensional model for Xingouzui Formation, Jiangling Depression, this paper makes an analysis of the migration, distribution and dissolution of the injected CO2 in the reservoir, and the permeability of the reservoir and the caprock. Results indicate that the model can be a very good description of the migration process and distribution status of the CO2 in the reservoir, and the influence of the geological factors such as the permeability, the capillary pressure and the mineral abundance of the reservoirs must be considered in practical project.