甘肃省二氧化碳储存地质条件及潜力分析  

GEOLOGICAL CONDITIONS AND POTENTIAL ANALYSIS OF CO_(2) STORAGE IN GANSU PROVINCE

作　　者：范斌 杨俊武 张凌鹏 张霖鑫 肖青成 FAN Bin;YANG Jun-wu;ZHANG Ling-peng;ZHANG Lin-xin;XIAO Qing-cheng(The Second Institute of Geology and Minerals Exploration,Gansu Provincial Bureau of Geology and Minerals Exploration and Development,Lanzhou 730020,China;Gansu Geothermal Resources Exploration and Development Technology Innovation Center,Lanzhou 730020;Exploration Research and Development Center of Geothermal Resources,Lanzhou 730020,China;The Fourth Institute of Geology and Minerals Exploration,Gansu Provincial Bureau of Geology and Minerals Exploration and Development,Jiuquan 735000,China)

机构地区：[1]甘肃省地质矿产勘查开发局第二地质矿产勘查院,甘肃兰州730020 [2]甘肃省地热资源勘查开发技术创新中心,甘肃兰州730020 [3]甘肃省地质矿产勘查开发局地热资源勘查研究开发中心,甘肃兰州730020 [4]甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉735000

出　　处：《甘肃地质》2024年第2期69-76,共8页Gansu Geology

基　　金：甘肃省生态环境厅“甘肃省二氧化碳封存(CS)地质条件调查研究”项目(编号STQH2023004)。

摘　　要：二氧化碳地质储存是一种高效可行的碳减排措施,有利于减轻碳排放对气候环境的影响和助力国家“双碳”目标的实现。为掌握甘肃省二氧化碳地质储存的适宜区域和潜力,本次在深入研究全省二氧化碳储存机理和储存地质条件的基础上,对研究区二氧化碳地质储存的潜力进行了分析评价。结果显示:(1)甘肃省具有较为优异的二氧化碳储存的地质条件,区内沉积盆地数量多、分布广,盆地内沉积地层较为稳定,圈闭构造、孔隙裂隙等都较为发育,是二氧化碳储存的理想场所。(2)经评价,全省9大主要沉积盆地CO_(2)储存总潜力可达1683.98亿吨;按储存介质来说,深部咸水含水层储存潜力远大于其它两种介质,约占总潜力的97.65%,其它介质煤田、油田的储存潜力远小于前者;按不同盆地的储存潜力来划分,以陇东盆地储存潜力为全省各盆地中最大,约占全省盆地潜力的42.13%,其它盆地相对较小。(3)研究区内对二氧化碳地质储存控制作用较大的要素主要为盆地面积、深部咸水含水层厚度、有效孔隙度、煤层气及原油储量、原油采收率等。本次研究结果对甘肃省二氧化碳地质储存的远景规划和后期深入调查研究具有重要的指示和指导意义。CO_(2) geological storage is an efficient and feasible carbon emission reduction measure,which is helpful to reduce the impact of carbon emission on climate and environment and to achieve the national“Peak carbon,carbon neutral”target.In order to grasp the potential and distribution characteristics of CO_(2) geological storage in Gansu province,on the basis of in-depth study of CO_(2) storage mechanism and geological conditions in the province,the potential of CO_(2) geological storage in the study area is analyzed and evaluated.The results show that:(1)Gansu Province has excellent geological conditions for CO_(2) storage,and the sedimentary basins in the area are abundant and widely distributed,and the sedimentary strata in the basins are relatively stable;Trap structures,pores and fissures are well developed,which is an ideal place for CO_(2) storage.(2)According to the evaluation,the storage potential of CO_(2) in 9 major sedimentary basins of the province is 168.398 billion tons,and the storage potential of deep saline aquifer is much greater than that of the other two media,accounting for 97.65%of the total storage potential,the storage potential of coal and oil fields in other media is much smaller than that of the former.According to the storage potential of different basins,the storage potential of Longdong Basin is the largest in the whole province,accounting for 42.13%of the whole province's basin potential,other basins are relatively small.(3)The main controlling factors of CO_(2) geological storage in the study area are basin area,thickness of deep salt water aquifer,effective porosity,coal-bed methane and crude oil reserves,crude oil recovery factor,etc..The results of this study have important directive and guiding significance for the long-term planning and in-depth investigation of CO_(2) geological storage in Gansu Province.

关 键 词：二氧化碳 地质储存 潜力分析 甘肃省 

分 类 号：X701[环境科学与工程—环境工程] TQ116[化学工程—无机化工] P624[天文地球—地质矿产勘探]