超临界CO<sub>2</sub>环境下磷酸盐改性铝酸盐水泥性能变化

doi:10.11896/cldb.23090114

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Abstract The geological storage of CO₂ is a key technology for reducing CO₂ emissions, and the cementing material resistant to supercritical CO₂ corrosion is a prerequisite for long-term CO₂ storage. The oil well cement (OWC) currently used cannot guarantee the long-term effectiveness of CO₂ storage due to its intrinsically high alkalinity. Calcium aluminate phosphate cement (CAPC) has strong carbonation resistance, but its corrosion resistance under supercritical CO₂ is not clear. This work disclosed the changes in performance of CAPC and OWC under supercritical CO₂. The results of compressive strength, permeability, and carbonization depth tests showed that the compressive strength of CAPC increased within 90 d, while the permeability did not significantly increase, and the carbonization depth was less than 0.05 mm. After 7 d of exposure to supercritical CO₂, OWC began to experience a decrease in compressive strength and an increase in permeability. At 90 d of exposure, the carbonization depth of OWC reached 1.10 mm, which is more than 20 times that of CAPC. These findings indicate that CAPC is an ideal cementing material for CO₂ storage wells.

Key words： calcium aluminate phosphate cement oil well cement supercritical CO₂ compressive strength permeability

Published: 25 December 2024 Online: 2024-12-20

CLC number:

TU528

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	Articles by authors
	SONG Maolin
	ZHANG Chaoyang
	ZHANG Shangfeng
	HOU Xiaowei
	SHI Ligang
	YU Bin
	LUO Yuwei
	KONG Xiangming

Cite this article:

SONG Maolin,ZHANG Chaoyang,ZHANG Shangfeng, et al. Change in Performance of Calcium Aluminate Phosphate Cement Under Supercritical CO₂[J]. Materials Reports, 2024, 38(24): 23090114-4.

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http://www.mater-rep.com/EN/10.11896/cldb.23090114 OR http://www.mater-rep.com/EN/Y2024/V38/I24/23090114

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