摘要
广东省西部地区汇聚了一大批重化工企业,是我国比较典型的沿海重化工聚集区。近年来在“双碳”目标的引领下,沿海重化工聚集区CO_(2)减排压力紧迫,在该区域开展CCUS源汇匹配研究,合理部署CCUS集群,可显著降低CCUS经济成本,对于探索沿海地区“碳中和”路径具有重要现实意义。为此,以广东省西部沿海地区(以下简称粤西)重化工聚集区为研究对象,基于该地区CO_(2)排放源和近海北部湾盆地地质特征,借助钻井和地震数据构建三维地质模型等,评估了北部湾盆地咸水层的CO_(2)封存潜力,进而以“最小支撑树法”构建了CCUS源汇匹配模型,并开展了CO_(2)咸水层地质封存源汇匹配研究,最后引入“节约里程法”对源—汇路径进行了优化。研究结果表明:(1)北部湾盆地咸水层的CO_(2)封存潜力为251.6×10^(8) t;(2)涠西南、乌石、迈陈、福山和雷东凹陷具备作为CO_(2)封存点的地理优势;(3)源汇匹配模型揭示,在粤西地区有2条适宜的源汇路线,一是湛江市排放点(源)→乌石凹陷咸水层(汇),二是茂名市及阳江市排放点(源)→雷东凹陷(汇);(4)优化后实际建设管道长为430 km(优化率高达61.4%)、CCUS全流程成本为3118.80×10^(8)美元,捕集成本占比达87%。结论认为:(1)通过上述2条优化路线进行CO_(2)埋存,在2030—2060年运行期内,估算可盈利约55.95×10^(8)美元;(2)随着“碳中和”日程的接近以及捕集技术迭代、碳价持续上涨、CCUS成本不断下降等有利因素影响,上述源—汇优化路径的经济效益将更加可观。
A large number of heavy chemical enterprises have gathered in western Guangdong Province,which is a typical coastal heavy chemical industry gathering area in China.In recent years,under the guidance of"dual-carbon"goals,the coastal heavy chemical industry gathering areas face significant pressure from CO_(2) emission reduction.Researching the CCUS source-sink matching in these areas and deploying CCUS clusters reasonably can result in a significant reduction in the economic cost of CCUS,and is of important and practical significance for exploring the paths of"carbon neutrality"in coastal areas.Taking the heavy chemical industry gathering area in western Guangdong Province as an example,a 3D geological model was established by virtue of drilling and seismic data,based on the CO_(2) emission sources in this area and the geological characteristics of the coastal Beibuwan Basin.The model was used to evaluate the CO_(2) storage potential of the saline aquifers in the Beibuwan Basin.Then,a CCUS source-sink matching model was constructed by the minimum support tree method,and the source-sink matching for the CO_(2) geological storage in saline aquifers was investigated.Finally,the mileage saving method was introduced to optimize the source-sink paths.The following results are obtained.First,the saline aquifers in the Beibuwan Basin have the CO_(2) storage potential of 251.6×10^(8) t.Second,Weixinan,Wushi,Maichen,Fushan,and Leidong depressions possess geographical advantages as CO_(2) storage sites.Third,the source-sink matching model reveals two suitable source-sink paths in western Guangdong Province:emission points in Zhanjiang(source)→saline aquifers in Wushi depression(sink),and emission points in Maoming and Yangjiang(source)→Leidong depression(sink).Fourth,after the optimization,the actual pipeline construction length is 430 km(optimization rate up to 61.4%),the CCUS whole-process cost is USD 3118.80×10^(8),with capture cost accounting for 87%.In conclusion,during the operational period from 2030 to 2060,CO_(2) storage through these two optimized paths is projected to generate approximately USD 55.95×10^(8) in profits.What's more,with the approaching of the timeline for achieving carbon neutrality,and the favorable factors such as the upgrading of capture technologies,the continuous rising of carbon price and the continuous dropping of CCUS cost,the optimized source-sink paths will achieve considerable economic benefits.
作者
方小宇
熊鹏飞
杨浦
郑益军
占乃大
陆江
李维鼎
张亚杰
李画
李绪深
FANG Xiaoyu;XIONG Pengfei;YANG Pu;ZHENG Yijun;ZHAN Naida;LU Jiang;LI Weiding;ZHANG Yajie;LI Hua;LI Xushen(Guangdong Laboratory of Southern Marine Science and Engineering-Zhanjiang,Zhanjiang,Guangdong 524088,China;Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,Guangdong 510640,China;School of Earth Resources,China University of Geosciences-Wuhan,Wuhan,Hubei 430074,China;CNOOC Zhanjiang Company,Zhanjiang,Guangdong 524088,China)
出处
《天然气工业》
北大核心
2025年第1期207-216,共10页
Natural Gas Industry
基金
中国科学院学部咨询评议项目“我国CO_(2)捕集与封存(CCS)面临的重大科技问题与政策建议”(编号:2022-ZW10-A-023)
湛江市碳达峰碳中和领域技术攻关专项项目“粤西近海盆地规模化CO_(2)封存场址优选及工程规划方案研究”(编号:2022A01061)。
关键词
粤西地区
沿海重化工聚集区
CCUS
CO_(2)离岸封存
源汇匹配
封存潜力
碳中和
咸水层
Western Guangdong Province
Coastal heavy chemical industry gathering area
CCUS
Offshore CO_(2)storage
source-sink matching
Storage potential
Carbon neutrality
Saline aquifer
