超临界CO2 - - 基于乙烯基埃斯特树脂的稳定水泥材料,用于维护井口完整性
Zhong Li1, Zhiming Yin1, Dingzhao Zhou1
1CNOOC Research Institute Co., Ltd., Beijing 100028, China.
Materials (Basel, Switzerland)
|January 25, 2025
概括
基于树脂的新材料为二氧化碳储存提供了卓越的井口完整性. 这些替代品抵御酸性CO2流体的腐蚀,保持强度和低透性,与传统的波特兰水泥不同.
科学领域:
- 地质科学 地质科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 井井完整性对于地质二氧化碳 (CO2) 储存至关重要.
- 普通的波特兰水泥 (PC) 在高温,高压 (HTHP) CO2环境下降解,增加透性和降低机械强度.
- 这种降解损害了二氧化碳封存的安全性和效率.
研究的目的:
- 评估在富含二氧化碳的环境中对井口完整性的替代材料.
- 为了比较耐热性乙烯基树脂 (TSR),填料复合树脂 (FCR) 和树脂水泥 (RC) 与普通波特兰水泥 (PC) 的二氧化碳耐腐蚀性.
主要方法:
- 腐蚀实验在60°C和10MPa的超临界CO2气体和水下进行了28天.
- 测试的材料包括PC,TSR,FCR和RC.
- 鉴定包括机械测试,透度测量,FTIR,XRD和SEM分析.
主要成果:
- 普通的波特兰水泥 (PC) 在暴露于CO2后显示出显著的机械性能降解和透性增加.
- PC样本在气体中呈现透性腐蚀,在水相中呈现推进性腐蚀.
- TSR,FCR和RC表现出极好的二氧化碳耐腐蚀性,保持高压力强度 (131,99,58MPa) 和低透性 (<6×10−7到0.16mD).
结论:
- TSR,FCR和RC是PC的有希望的替代品,用于二氧化碳的地质储存井口应用.
- 与传统水泥相比,这些材料在抵抗二氧化碳腐蚀方面提供了更好的性能.
- 它们的使用可以在富含二氧化碳的环境中提高长期井口完整性.
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