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高性能油井水泥与修改的碳酸胡须:在HTHP条件下提高耐用性
Xingguo Liu1, Jiankun Qin1,2, Rongdong Dai1
1Research Institute of Petroleum Engineering Technology, Shengli Oilfield, Dongying 257000, China.
Materials (Basel, Switzerland)
|March 13, 2025
概括
修改后的碳酸胡须增强油井水泥,提高机械强度和在高温和高压条件下的密封完整性. 这种纤维硬化水泥为具有挑战性的钻井应用提供了持久的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 石油工程是石油工程中的一个.
- 纳米技术 纳米技术
背景情况:
- 油井水泥系统在高温和高压 (HTHP) 条件下面临脆弱性和裂的挑战,损害了油井井的完整性.
- 传统的水泥配方在承受动态负载和极端环境时表现出不良的密封性能和机械耐用性.
研究的目的:
- 为了研究将四乙烯正酸盐 (TEOS) 修饰的碳酸胡须纳入油井水泥的有效性.
- 在模拟的HTHP条件下提高水泥的机械性能,性和密封完整性.
主要方法:
- 使用四乙烯正酸盐 (TEOS) 处理制备改性碳酸胡须纤维.
- 在5%度下将改性胡须纤维纳入油井水泥泥中.
- 在150°C的循环交替压力下,评估机械性能 (压力和屈曲强度),质性行为,加厚时间和气体密度.
主要成果:
- 加入5%的修改后的胡须纤维显著改善了水泥性能,压力强度增加了24.5%,曲强度增加了43.3%.
- 纤维硬化水泥泥表现出增强的性,并在模拟的HTHP循环负荷下在150°C下保持出色的气密性和机械完整性.
- 随着改性纤维的添加,质性质和加厚时间保持稳定,表明适合实际应用.
结论:
- 修改的碳酸胡须纤维有效地提高了油井水泥的机械耐用性和密封性能,在极端的HTHP条件下.
- 开发的纤维增强水泥系统提供了一个实用且强大的解决方案,用于在具有挑战性的水泥应用中改善井口完整性.
- 用TEOS处理的胡须提供了一种可行的策略,以减轻水泥裂,并确保长期的井口密封.
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