CO2地质封存技术及其同位素在咸水层的化学行为研究进展

 深部咸水层是CO₂地质封存的主要封存地, 因所处地质背景和在地质历史过程中经历的地球化学环境不同, 其地球化学行为也各不相同。本文综述地质封存空间与封存量、地质封存类型、同位素标记CO₂在咸水层的化学行为的研究进展。分析表明, 目前关于CO₂地质封存的研究在现象实验、模拟和现场实验方面都取得了初步进展, 但对CO₂注入地下后的行为过程仍有很多未解决的理论和技术难题;CO₂地质封存监测方法的选择主要取决于具体的场地条件和场地的风险情况, 未来技术发展主要集中于封存场地评价与储层响应监测技术。

A review on CO2 geological storage technologies and chemical behaviors of isotope in salty water layer

Deep saline aquifer is a major geological storage site for CO₂. The geochemical behaviors of deep saline aquifers differ each other due to their different geological backgrounds and geochemical environments in their geological histories. This paper reviews the research progresses on geological storage space and storage capacity, types of geological storage and chemical behaviors of isotopelabeled CO₂ in saltwater layer. It is shown that though current researches on CO₂ geological storage have made progresses in phenomenon experiments, simulations and field experiments, many theoretical and technical problems of the behaviors of CO₂ after injecting underground remain unresolved. The choice of monitoring methods for CO₂ geological storage mainly depends on the specific site condition and risk profile. Future technological developments may focus on the evaluation of storage site and monitoring technologies of reservoir response.