盐水层CO2埋存潜力及影响因素数值模拟

 温室气体CO₂使全球气候变暖,对人类生存和社会经济发展构成了严重威胁。研究表明,沉积盆地深部存在体积巨大的盐水层,盐水不宜开发利用,但可用来埋存CO₂。本文首先对盐水层CO₂埋存机制进行研究分类,得到盐水层CO₂埋存量计算公式,在对埋存机制及公式分析的基础上,运用Eclipse数值模拟软件,通过数值模拟的方法综合分析水平渗透率、纵横渗透率比值、地层韵律、地层矿化度及温度对盐水层CO₂埋存的影响,并对各影响因素进行了系统评价。结果表明,盐水层的渗透率、纵横向渗透率比值、沉积韵律是影响盐水层CO₂埋存量的主要因素,盐水层的矿化度和温度是影响CO₂溶解量的主要因素。

Numerical Simulation of Influencing Factors of CO2 Storage in Saline Aquifer

Huge amount of greenhouse gas emission of carbon dioxide leads to global warming, which poses challenging problems for both the survival of human beings and the social economic development. In an appropriately confined place, there may have a saline aquifer of huge storage volume, which is not very useful in itself, but the volume can be used to store CO₂. Based on the mechanism of storing CO₂ in a saline aquifer, the influencing factors of a reservoir and the fluid in storing CO₂ in a saline aquifer are studied in this paper by adopting the Eclipse software. The simulation results show that the permeability, the ratio of the vertical and the horizontal permeability and the rhythm are the main influencing factors of the CO₂ storage volume in the saline aquifer. The salinity and the temperature are the main influencing factors of CO₂ dissolved volume in the saline aquifer. We can draw some guidance for the CO₂ storage in the field.