南海典型枯竭气藏CO_(2)封存潜力评估与展望  

Potential assessment and outlook on CO_(2)storage in classic depleted gas reservoirs of the South China Sea

作　　者：李保振 田虓丰 唐恩高 苏彦春 张健 周文胜 LI Baozhen;TIAN Xiaofeng;TANG En’gao;SU Yanchun;ZHANG Jian;ZHOU Wensheng(State Key Laboratory of Offshore Oil and Gas Exploitation,Beijing 100028,China;CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)

机构地区：[1]海洋油气高效开发全国重点实验室,北京100028 [2]中海油研究总院有限责任公司,北京100028

出　　处：《天然气勘探与开发》2024年第6期116-121,共6页Natural Gas Exploration and Development

基　　金：中海石油(中国)有限公司重大科技项目(编号:KJGG-2022-12-CCUS-0203)。

摘　　要：我国东南近海地区工农业发达,是主要的温室气体排放区域,减排压力日益严峻,但是陆上埋存潜力有限;同时我国南海勘探开发了大量的富含CO_(2)气藏,在天然气外输和终端处理过程中存在较大的减排压力。为此,针对近海大型近枯竭气田实施CO_(2)封存的可行性进行研究:(1)分析了枯竭气田CO_(2)封存的机理与优缺点;(2)通过国内外典型枯竭气藏CO_(2)驱油与封存的实例的剖析,总结了其在实施策略、关键技术、实施效果方面的经验;(3)基于南海富含CO_(2)气藏减排需求与陆上排放源情况,评估了在海上近枯竭的Y气田实施CO_(2)封存的潜力。研究结果表明:近海接近枯竭的Y气田封存条件及源汇匹配条件较好,比较适宜开展陆上CO_(2)海洋封存先导实践探索,其理论埋存量可达3×10^(8)t,能够满足邻近或联网高含CO_(2)油气藏的排放量的埋存需求。Offshore southeastern China with well-developed agriculture and industry is the leading area for emitting greenhouse gas,and also faces pressure of emission reduction which has been a serious problem.But the potential for onshore storage is very scarce.Meanwhile,there are numerous gas reservoirs rich in carbon dioxide(CO_(2))in the South China Sea,which brings about the tremendous pressure to this reduction during natural-gas transportation and terminal processing.Therefore,a feasibility study was conducted on the implementation of CO_(2)storage in the border on large depleted gasfields in the offshore.Moreover,the mechanisms,advantages and disadvantages were discussed for such CO_(2)storage.Many experiences in implementation strategies and effects together with key technologies were summed up by analyzing CO_(2)flooding and storage practices in typical depleted gas reservoirs at home and abroad.On top of that,the storage prospects in the offshore nearly depleted Y gasfield were evaluated according to demands on the emission reduction to CO_(2)-rich reservoirs in the South China Sea and the conditions of onshore emission source.Results show that this field boasts better conditions in storage and source-sink matching,making it suitable for the pilot test on offshore storage of onshore CO_(2).And the theoretical storage capacity of 3×10^(8) t may meet storage needs of discharge amount in adjacent or online reservoirs with rich CO_(2).

关 键 词：南海 近枯竭气藏 封存 源汇匹配 CO_(2) 

分 类 号：TE5[石油与天然气工程—油气田开发工程] X701[环境科学与工程—环境工程]