Structural evolution in micro-calcite bearing Ca-montmorillonite reinforced oilwell cement during CO2 invasion

doi:10.1016/j.conbuildmat.2021.125744

	Structural evolution in micro-calcite bearing Ca-montmorillonite reinforced oilwell cement during CO2 invasion
	Mei, Kaiyuan 2,3; Zhang, Liwei 2,3; Wang, Yan 3; Cheng, Xiaowei 1; Xue, Quan 2,3; Gan, Manguang 2,3; Fu, Xiaojuan 3; Zhang, Chunmei 1; Li, Xiaochun 2,3
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2022-01-10
卷号	315 页码:11
关键词	Supercritical CO2 Oilwell cement Structural evolution Microcrystal modification
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2021.125744
英文摘要	High concentration CO2 invades and forms carbonate layers in oilwell cement under geological CO2 sequestration conditions. Long-term invasion of CO2 makes the carbonation structure unstable and prone to damage. For the reinforcement of oilwell cement, Ca-montmorillonite (Ca-MMT) was modified using supercritical CO2(ScCO2) as the solvent and intercalator. The micro-calcite bearing Ca-montmorillonite (MC Ca-MMT) was added to the cement slurry to reinforce the oilwell cement after the modification. Microcrystal calcite was identified in the MC Ca-MMT through transmission electron microscopy(TEM) and selected-area electron diffraction(SAED) analyses. The mechanical properties and microstructural evolution of the MC Ca-MMT reinforced oilwell cement were investigated, revealing that the carbonation was inhibited by MC Ca-MMT. Through the analysis of microcrystal formation and densified carbonation area, the CO2-resisting mechanisms of MC Ca-MMT reinforced oilwell cement were revealed in this study.
资助项目	National Natural Science Foundation of China[41902258] ; National Natural Science Foundation of China[U1967208] ; National Key R&D Program of China[2019YFE0100100] ; Key R&D Program of Inner Mongolia Province of China[2021ZD0034-3] ; Innovative Postdoctoral Research Funding in Hubei Province[258560] ; Science and Technology Plan Project of Sichuan Province[2021YFSY0056]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000740111600005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/30845]
专题	中科院武汉岩土力学所
通讯作者	Zhang, Liwei
作者单位	1.Southwest Petr Univ, Sch New Energy & Mat, Chengdu 610500, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Mei, Kaiyuan,Zhang, Liwei,Wang, Yan,et al. Structural evolution in micro-calcite bearing Ca-montmorillonite reinforced oilwell cement during CO2 invasion[J]. CONSTRUCTION AND BUILDING MATERIALS,2022,315:11.
APA	Mei, Kaiyuan.,Zhang, Liwei.,Wang, Yan.,Cheng, Xiaowei.,Xue, Quan.,...&Li, Xiaochun.(2022).Structural evolution in micro-calcite bearing Ca-montmorillonite reinforced oilwell cement during CO2 invasion.CONSTRUCTION AND BUILDING MATERIALS,315,11.
MLA	Mei, Kaiyuan,et al."Structural evolution in micro-calcite bearing Ca-montmorillonite reinforced oilwell cement during CO2 invasion".CONSTRUCTION AND BUILDING MATERIALS 315(2022):11.