华北平原CO2地下埋存潜力研究

以CO2地质埋存的观点开展华北平原CO2埋存地质学研究,通过对主要地质要素的分析,阐述冀中坳陷的地质背景和构造演化,提出在华北平原具有3层区域性的CO2封盖-储存结构: 即顶层馆陶组-明化镇组组合,中层古近系多次湖盆演化形成的储盖组合以及底层古潜山碳酸盐岩储层,并且对它们的岩石性质、圈闭类型与水文地质特征进行较详细的论述,同时讨论了埋存地区的构造稳定性,初步评估冀中坳陷CO2埋存潜力,建议将冀中坳陷列为CO2地下封存的试验候选区。

PRELIMINARY STUDY ON GEOLOGICAL STORAGE CAPACITY OF CO2 IN HUABEI OIL FIELD,CHINA

From viewpoint of CO2 storage underground,the geological characteristics of Jizhong Depression were studied,including its geological background and tectonic evolution.It is proposed that there are three sets of sequences that can be used to store CO2: the upper sequence which is composed of Minghuazhen Group and Guantao Group of Neogene age,the middle sequence which consists of sediments formed during the lacustrine stage in Paleogene,and the lower sequence composed of carbonate reservoir.The rock properties,trap types,hydrogeological feature and structural stability were discussed as well.Potential CO2 storage capacity was evaluated.The storage capacity was 5.73×108~9.53×108 tons CO2 in buried hills and more than 1 billion tons in Guantao Group.The authors suggested that Jizhong Depression could be a candidate site for CO2 storage underground.