关于改进水基钻井泥膨胀控制使用改性聚乙烯醇的方法
Danielle Poungui1, Yuichi Sugai1, Ronald Nguele2
1Department of Earth Resources Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
ACS omega
|May 13, 2024
概括
这项研究将改性聚乙醇 (PVOH) 引入水性泥 (WBM),以应对高温,高压钻井的挑战. 非离子聚合物显著改善了泥过和稳定性,表现优于阴性聚合物.
科学领域:
- 石油工程是石油工程中的一个.
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 在高温,高压 (HT/HP) 钻井中,井口不稳定是一个关键的挑战.
- 粘土膨胀和钻井流体损失加剧了井口的不稳定性.
- 聚乙烯醇 (PVOH) 衍生物正在作为添加剂来减轻这些问题.
研究的目的:
- 为了评估非离子和阴离子改性聚乙烯醇 (PVOH) 在水性泥 (WBM) 中的有效性,用于HT/HP钻井.
- 评估PVOH对泥风湿学,比重和高温过特性的影响.
- 为了确定PVOH聚合物在粘土颗粒上的吸附行为.
主要方法:
- 制备非离子和阴离子PVOH聚合物.
- 在不同度 (0.08,0.28,0.49 wt.%) 的WBM中引入PVOH.
- 在25°C,55°C和85°C的温度下对比重,泥流学和过的实验分析.
- 热重力测量分析 (TGA) 用于评估热稳定性.
主要成果:
- 泥的特异性重力和风质随着温度的增加而单调地减少.
- 非阴性PVOH提高了泥过率高达34.7%,远高于阴性PVOH.
- 非离子聚合物对粘土颗粒的吸附率较高 (118.9 mg/g),相比于离子聚合物 (84.51 mg/g).
结论:
- 改性PVOH聚合物,特别是非离子类型,在HT/HP条件下改善钻井流体性能方面表现有前途.
- 非性PVOH有效减少流体损失,提高泥蛋糕的质量.
- 这项研究证明了定制聚合物添加剂在具有挑战性的钻井环境中稳定井口的潜力.
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