有机粘土基凝的压力依赖性收益应力
Nikolaos A Burger1,2, Benoit Loppinet1, Andrew Clarke3
1IESL-FORTH, P.O. Box 1527, GR-711 10 Heraklion, Greece.
Langmuir : the ACS journal of surfaces and colloids
|July 29, 2025
概括
这项研究揭示了压力和温度如何影响钻井流体的特性. 钻井流体中的产量应力随着压力增加而增加,但随着温度下降,与粘土分散不同.
科学领域:
- 类风病学 类风病学 类风病学
- 体科学 体科学 体科学
- 材料科学 材料科学 材料科学
背景情况:
- 在极端条件下了解钻井流体的浮力学行为,对于优化钻井操作至关重要.
- 之前的研究已经探讨了温度效应,但压力依赖性,特别是高压,对于复杂的液体配方来说仍然不太了解.
研究的目的:
- 为了研究压力和温度的流量曲线的依赖性和产应力 (σy) 在一个模型钻井流体和其母粘土分散.
- 分析两种系统在高压下产量应力衰老的行为.
- 阐明影响产量应力与压力和温度演变的潜在机制.
主要方法:
- 使用高压电池,可靠的协议,测量高达100MPa和85°C.
- 在高剪速和屈服应力 (σy) 的情况下测量粘度,作为压力和温度的函数.
- 应用现象学运动模型来描述产量压力的时间演变 (衰老).
主要成果:
- 在高切割速率下,粘度随着两种系统的压力增加,与溶剂粘度相关.
- 对于粘土分散物,屈服应力随着压力增加,随着温度稍微增加.
- 对于钻井液来说,产量应力随压力增加而随温度降低,表现出压力依赖的老化.
- 衰老动力学是独立于压力,但衰老振幅是压力依赖的.
结论:
- 压力主要影响粒子间相互作用 (粘土颗粒和乳液滴),而不是钻井液体中的体积分数.
- 独特的老化行为表明,粘土分散与钻井流体配方对压力的结构反应不同.
- 研究结果提供了对产量应力起源及其对技术相关流体压力和温度的反应的关键见解.
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