钻井液与完井液2026，Vol.43Issue(2)：209-216,8.DOI:10.12358/j.issn.1001-5620.2026.02.009
钙基晶须自修复剂对CCUS井固井水泥石裂缝自修复的影响
The Influence of Calcium-Based Whisker Self-Healing Agent on Self-Healing of Oil Well Set Cement Cracks in CCUS Wells
摘要
Abstract
In wells for carbon capture,utilization and storage(CCUS),cement sheaths are easy to get chemically damaged,hence reducing their service life.A study was conducted to enhance the self-healing capacity of cement sheaths by reacting calcium-based whisker self-healing agent with CO2 to produce CaCO3.The influence of calcium-based whisker self-healing agent on the self-healing process of cement sheaths was studied using mechanical tester,X-ray diffractometer(XRD),thermogravimetric analyzer(TGA),scanning electron microscope(SEM)and industrial computed tomography(CT)etc.The results of mechanical performance tests showed that after 28 days of self-healing,the self-healing rate of the compressive strength of the set cement incorporated with the calcium-based whisker reached 83.87%,which is 90.31%higher than that of the set cement without incorporating calcium-based whisker.Phase analysis and SEM observation results show that a large number of calcite-type calcium carbonate crystals were generated around the self-healing material and deposited in the cracks of the set cement,thereby rendering the cracks in the set cement carbonized self-healing.CT test results further confirmed the self-healing effect of the calcium-based whisker self-healing agent;after 28 days of self-healing,the volume of the cracks in the set cement incorporated with the calcium-based whisker self-healing agent was reduced by 4,165.95 mm3,a self-healing rate of 72.32%.This indicates that in the CCUS well environment,the incorporation of calcium-based whisker self-healing materials into a cement slurry has a positive impact on the carbonized self-healing process of the cement sheath.关键词
钙基晶须/CCUS/碳化自修复/固井水泥环Key words
Calcium-based whisker/CCUS/Carbonized self-healing/Cement sheath分类
能源科技引用本文复制引用
曹洪昌,党冬红,张晔,任强,刘景丽,刘岩,彭松,马骏..钙基晶须自修复剂对CCUS井固井水泥石裂缝自修复的影响[J].钻井液与完井液,2026,43(2):209-216,8.基金项目
中国石油集团渤海钻探公司项目"CCUS/CCS遇CO2自修复水泥浆技术研究"(2024ZD06F-04). （2024ZD06F-04）
