典型电厂海洋CO2地质储存场地选址适宜性评估

我国华东和东部沿海地区分布有大量的火电、水泥和炼油等CO₂排放源，但由于距离陆域大中型沉积盆地较远，限制了规模化的深部咸水层CO₂地质储存工程选址。本文以华能玉环电厂为实例，开展了东海陆架盆地瓯江凹陷场地选址适宜性评估。通过瓯江凹陷CO₂地质储存地质条件分析，初步圈定出了发育有利储盖层的目标靶区，并依次开展了地质安全性和经济适宜性分析。利用碳封存领导人论坛潜力评估公式，计算了目标靶区推荐储层的单位面积储存潜力；并在构建综合储集条件、地质安全性条件和经济适宜性条件的指标体系基础上，开展了GIS多源信息叠加评估，在丽水西次凹内筛选出两处较好的场地。研究对开展该区海域CO₂地质储存选址具有一定的探索意义。

Site Selection for Offshore CO2 Geological Storage and Its Suitability Evaluation:A Case Study of Yuhuan Power Plant

A large number of power plants, cement plants, refineries and other CO₂ sources locate in East China and eastern coastal areas. However, deep saline aquifers for large scale CO₂ storage projects lack because of long distance from onshore large and medium-sized sedimentary basins. Taking Yuhuan power plant as an example, we carried out an evaluation on suitability of Oujiang depression in the basin of East China Sea shelf for CO₂ geological storage. Based on geological study, potential reservoirs and caprocks are preliminarily delineated, and then geological safety and economic suitability are studied. Using formulas proposed by CSLF (carbon sequestration leadership forum), the CO₂ storage potential per square kilometers for selected reservoirs was evaluated too. And based on the index system consisting of reservoir, geological safety and economic suitability, we carried out suitability evaluation for site selection in deep saline aquifers using the GIS multi-information fusion. Finally, two sites located in west secondary Lishui depression are suggested for Yuhuan power plant. This paper could provide guidance for offshore CO₂ geological storage site selection in East China and eastern coastal areas.