评估Na-EDTMP/borax系统作为油井水泥的非分散性高温延缓剂
Dominik Staude1, Johann Plank1
1Technical University of Munich, Construction Chemistry, Lichtenbergstraße 4, 85747, Garching, Germany.
Heliyon
|October 24, 2024
概括
这项研究引入了一种乙二胺四甲基酸 (Na-EDTMP) /borax系统,以防止高温水井凝固中的热稀释. 这种新的方法提高了水泥泥的稳定性,这对于极端条件下的井口完整性至关重要.
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.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 高温井凝固 (>120°C) 面临着热稀释,降低泥粘度和导致颗粒沉积的挑战.
- 现有的高温减速器系统在140°C以上往往失效,或引入复杂性和负面相互作用.
- 由于泥稳定性差,区域隔离不完善,可能会损害井口完整性.
研究的目的:
- 为了研究乙二胺四 (Na-EDTMP) /borax延缓器系统的高温井固剂的有效性.
- 评估系统能够提供足够的延迟和减轻热稀释的能力.
- 在高压和高温 (HP/HT) 条件下评估泥的整体稳定性,可抽取性和与其他添加剂的兼容性.
主要方法:
- 对Na-EDTMP/borax减速器系统的全面研究.
- 厚化时间 (TT) 测试从50°C到200°C和高达19.0 kpsi.
- 开启/关闭周期的HP/HT组合计测试,学测量和压力强度 (CS) 发展分析.
主要成果:
- 达到713小时的加厚时间,随温度增加,高达200°C和19.0 kpsi.
- 证明了低热稀释和增强的泥稳定性,具有恒定的抽取能力 (1025 Bc) 和快速设置.
- 确定了最佳的Na-EDTMP/borax比率 (0.290.34),以提高性能和与流体损失添加剂的潜在兼容性.
结论:
- Na-EDTMP/borax延缓器系统为高温井凝固提供了低复杂性的解决方案,有效避免了热稀释.
- 该系统增强了水泥泥的稳定性,这对于HP/HT环境中的区域隔离和井口完整性至关重要.
- 由于系统的灵敏度,精确的剂量至关重要,特别是在中等温度下,但它为传统延迟器提供了可行的替代方案.
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