利用TOUGH2进行场地规模CO2地质封存的模拟方法

温室气体排量的增加,对人类的可持续发展造成了严重的影响。减少CO2的排量是人类急需解决的问题。作为有效的CO2减排途径,CO2地质封存技术发展前景乐观。本文首先从理论上详细介绍基于TOUGH2进行场地规模CO2地质封存数值模拟所采用的方法,说明了空间离散,边界条件的刻画,模型参数的获取,初始条件的确定以及不同注入方式下注入井的设置。以鄂尔多斯盆地的场地规模CO2地质封存为例,在TOUGH2-MP/ECO2N软件平台的支持下,介绍数值模拟的过程,并简要给出了数值模拟的结果,验证了这一过程的可行性。

Numerical simulation methods for site-scale CO2 geologic sequestration by using TOUGH2

The increasing emissions of greenhouse gases cause the serious influences on human sustainable development. Reducing CO2emissions becomes an urgent problem of human being to be solved. As an effective approach to reduce CO2 emissions, the prospects of CO2 geologic sequestration are optimistic. The methods for conducting numerical simulations of the site-scale CO2 geologic sequestration in saline aquifers are introduced based on TOUGH2 code. The detailed processes for the simulation of the hypothetical CO2 geologic sequestration in Ordos basin are presented, which including the spatial discretization, the characterization of boundary conditions, the access to model parameters, the determining of the initial conditions, the different settings of injection well for different injection methods. The simulation results are briefly discussed. The application example demonstrates the feasibility of the introduced modeling approaches.