含油气盆地咸水层二氧化碳封存潜力评价方法  

A CO_(2)storage potential evaluation method for saline aquifers in a petroliferous basin

作　　者：李阳[1] 王锐[2] 赵清民[2] 薛兆杰[1] 周银邦 LI Yang;WANG Rui;ZHAO Qingmin;XUE Zhaojie;ZHOU Yinbang(China Petroleum&Chemical Corporation,Beijing 100728,China;SINOPEC Petroleum Exploration&Production Research Institute,Beijing 102206,China)

机构地区：[1]中国石油化工股份有限公司,北京100728 [2]中国石化石油勘探开发研究院,北京102206

出　　处：《石油勘探与开发》2023年第2期424-430,共7页Petroleum Exploration and Development

基　　金：国家重点研发政府间国际科技创新项目“生物质CCS潜力与示范可行性”(2022YFE0115800);中国石化CCUS项目攻关群“双碳目标下中国石化CO_(2)封存工业应用关键技术”(P21075)。

摘　　要：以含油气盆地咸水层为对象,针对规模化工程实施需求,综合考虑地质因素、工程因素、经济因素等3方面限制条件,提出了适合于含油气盆地特点的四尺度、三层级碳封存潜力评价方法。结合中国含油气盆地特点,将含油气盆地封存潜力划分为盆地级、坳陷级、区带级与圈闭级4个评价尺度,封存潜力评价划分为理论封存量、工程封存量与经济封存量3个层级。理论封存量基于含油气盆地地质参数、储集层条件及流体性质,可细分为构造封存、束缚封存、溶解封存、矿化封存4种埋存机理;工程封存量受注入能力、安全封存压力、布井数量、注入时间影响;经济封存量基于盈亏平衡原理,主要考虑碳价收益、钻井投资及操作成本的影响。苏北盆地高邮凹陷咸水储集层评价结果表明,咸水储集层理论封存量中构造封存量占比最大,其次为溶解封存量和束缚封存量,矿化封存量最低;考虑注入性、安全性与经济性条件后,CO_(2)工程封存量和经济封存量与理论封存量相比大幅降低,分别仅为理论封存量的21.0%和17.6%。According to the requirements for large-scale project implementation,a four-scale and three-level CO_(2)storage potential evaluation method is proposed for saline aquifers in a petroliferous basin in China,considering geological,engineering and economic factors.The four scales include basin scale,depression scale,play scale and trap scale,and the three levels include theoretical storage capacity,engineering storage capacity,and economic storage capacity.The theoretical storage capacity can be divided into four trapping mechanisms,i.e.structural&stratigraphic trapping,residual trapping,solubility trapping and mineral trapping,depending upon the geological parameters,reservoir conditions and fluid properties in the basin.The engineering storage capacity is affected by the injectivity,storage security pressure,well number,and injection time.The economic storage capacity mainly considers the carbon pricing yield,drilling investment,and operation cost,based on the break-even principle.Application of the method for saline aquifer in the Gaoyou sag of the Subei Basin reveals that the structural&stratigraphic trapping occupies the largest proportion of the theoretical storage capacity,followed by the solubility trapping and the residual trapping,and the mineral trapping takes the lowest proportion.The engineering storage capacity and the economic storage capacity are significantly lower than the theoretical storage capacity when considering the constrains of injectivity,security and economy,respectively accounting for 21.0%and 17.6%of the latter.

关 键 词：含油气盆地 咸水层 碳封存潜力 碳封存机理 理论封存量 工程封存量 经济封存量 

分 类 号：TE345[石油与天然气工程—油气田开发工程]