硅酸盐学报

CO2对水泥石腐蚀机理及密封性的影响研究进展

单位：1. 东北石油大学石油工程学院黑龙江大庆 163318 2. 中国石油吉林油田公司油气工程研究院辽宁松原 138001 3. 中国石油吉林油田公司CO2捕集埋存与提高采收率开发公司辽宁松原 138000

分类号：TE256

出版年,卷(期):页码：2018,46(2):247-255

DOI：

摘要：

CO2对水泥石的腐蚀加剧了长期埋存与驱油期间CO2沿井筒逃逸的风险，CO2环境下水泥石的长期密封完整性是制约该项技术能否顺利实施的关键。总结了CO2对水泥石的腐蚀机理，重点阐述了CO2对水泥石的腐蚀规律、水泥石物性的变化规律及其内部各反应区域的特征，并在此基础上分析了CO2腐蚀对水泥石微裂缝渗透率的影响机理及自密封条件，最后根据目前的研究现状展望了该领域未来的发展方向。

In geological carbon sequestration (GCS) and CO2 flooding process, CO2 will corrode cement sheath and may have a great risk for its leakage along the wellbore. Therefore, the long-term integrity of cement sheath is a key issue to GCS and flooding process in CO2 circumstance. This paper summarized the corrosion mechanism of cement sheath, and focused on the rule of cement CO2 corrosion, the variation characteristics of cement physical properties and the characteristic of chemical reaction zone inside cement. In addition, this paper also analyzed the effect of CO2 corrosion on the cement fractures permeability and the condition of cement fractures self-sealing. This paper revealed some prospects in this field.

基金项目：

中国石油科技创新基金(2017D-5007-0310)；“十三五”国家科技重大专项(2016ZX05016-002)；国家自然科学基金(51404071、51774094)联合资助。

作者简介：

冯福平(1982—)，男，博士，副教授。

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