Carbon capture, utilization and storage (CCUS) is considered a major part of the Portuguese strategy for reducing CO₂ emissions. Some industrial sectors, the most prominent being the cement sector, require the implementation of CO₂ storage to reach carbon neutrality by 2050. This paper presents and characterizes the areas with potential for CO₂ storage in mainland Portugal. The lithostratigraphic and tectonic frameworks of the onshore and offshore basins are presented; a site screening process was conducted, based on basin- and regional-scale assessments, resulting in the definition of eight possible storage clusters, seven of which are offshore. The storage capacity was estimated for those clusters, with a central (P₅₀) value of 7.09 Gt; however, the most interesting locations are in the Lusitanian Basin (West Iberian Margin), both onshore and offshore, as they present high capacity and are located favourably in relation to the industrial CO₂ emitters. Considering only the potential sites of this basin, their storage capacities are greater than 3 Gt CO₂, of which 260 Mt are onshore.

Thematic collection: This article is part of the Geoscience for CO₂ storage collection available at: https://www.lyellcollection.org/cc/geoscience-for-co2-storage

碳捕集，利用和封存（CCUS）被认为是葡萄牙减少CO ₂排放战略的重要组成部分。一些工业部门，最突出的是水泥部门，要求实施CO ₂封存以在2050年之前实现碳中和。本文介绍并描述了葡萄牙大陆具有CO ₂封存潜力的地区。介绍了陆上和近海盆地的岩石地层学和构造学框架；根据流域和区域规模的评估，进行了现场筛选过程，从而确定了八个可能的存储集群，其中七个位于海上。估计了这些集群的存储容量，其中有一个中央存储区（P ₅₀）7.09 Gt的值；但是，最有趣的位置是陆上和海上的Lusitanian盆地（西伊比利亚边缘），因为它们具有高容量，并且相对于工业CO ₂排放者而言位置优越。仅考虑该盆地的潜在场所，它们的储存能力大于3 Gt CO ₂，其中260 Mt在陆上。

专题收集：本文是可用于以下位置的Geoscience for CO ₂储存集合的一部分：https://www.lyellcollection.org/cc/geoscience-for-co2-storage