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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。
Through the establishment of a two-dimensional model of the reservoir and caprock of the Xingouzui Formation in the Jiangling Depression of Jianghan Basin, the numerical simulation of geological storage of CO2 in the Jiangling Sag was carried out. The migration and distribution of dissolved CO2 and its dissolution and diffusion were analyzed. Permeability of the vertical direction was analyzed for sensitivity. The results show that the constructed two-dimensional model can well describe the process and distribution of CO2 in reservoirs, and must consider some geological factors such as reservoir permeability, Capillary pressure, abundance of rock mineral components and other changes on the storage effect.