中文摘要：

CO2地质储存适宜性的评估是CO2地质封存工程开展的重要决策依据，以西宁盆地为（D级）研究对象，采用层次分析理论，建立了CO2地质储存适宜性评价四级指标体系，对西宁盆地进行了CO2地质储存适宜性评价，结果表明：研究区地质储存不适宜区主要分布于小南川河谷东西两岸及湟水以北祁家川河谷较大支流两侧斜坡地带，分布面积167．36km^2，约占全区总面积36．4％，较适宜区主要分布于祁家川河谷及小南川河谷东西两岸及各大支沟两侧的低山丘陵区，分布面积185．56km^2，占研究区总面积的40．3％。适宜区主要分布于小南川河谷中上游西岸、洪水泉乡一带及祁家川河谷下游的低山丘陵区，分布面积107．08km^2，占总面积的23．3％。总体上研究区CO2地质储存适宜性确定为较适宜区。

英文摘要：

CO2 geological storage suitability evaluation is an important basis for deciding whether it is suitable to conduct a CO2 geological storage project. This paper adopts the theory of analytical hierarchy process to analyze the Xining basin（ level D）and establishes a four -level index system to evaluate CO2 geological storage suitability for the Xining basin. The results show that regions that are un- suitable for geological storage are mainly located at the east and west shore sides of Xiaonanchuan River valley as well as the area along the bigger tributaries of Qijiachuan river valley which is to the north of the HuangShui River. These regions cover an area of 167.36 km^2 ,making up 36. 4% of the total. Regions that are relatively suitable for geological storage area are mainly located in the Qijia- chuau river valley, east and west shore sides of the Xiaonanchuan River valley as well as the hilly area along the two sides of the big tributaries ,covering an area of 185.56 km^2 and making up 40. 3% of the total area under the research project. Areas that are best suitable for geological storage are mainly located in the west riverside of the upper reaches of Xiaonanchuan River valley, Hong- shuiquan village and the hilly area along the lower reaches of Qijiachuan valley, covering an area of 107.08 km^2 ,making up 23.3% of the total area. The suitability of CO2 geological storage in the study area was determined as a less suitable area.