核心外结构纳米过控制添加剂在耐盐粘土无水基钻井流体中的应用
Gang Wang1, Wanjun Li1, Shixin Qiu2
1CNPC Engineering Technology R&D Company Limited, Beijing 102249, China.
Polymers
|November 14, 2023
概括
研究人员开发了一种新的流体损失减速器 (FATG),用于无粘土的以水为基础的钻井流体. 这种添加剂增强了悬浮的稳定性和储的保护,即使在高温和盐度下,也显著减少了过损失.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 基于本托尼特的钻井流体容易受到由于固相入侵而造成的水库损伤.
- 传统的巴里特悬浮物表现出不良的稳定性,导致沉积和阻塞.
- 有效的水库保护需要具有增强稳定性和减少流体损失的钻井流体.
研究的目的:
- 开发一种耐温度和耐盐的流体损失减小剂,用于无超细粘土的水性钻井流体 (WBDF).
- 为了提高悬浮的稳定性,并尽量减少在钻井过程中储损坏.
- 评估开发的添加剂在恶劣的下孔条件下的性能.
主要方法:
- 用zwitterionic聚合物对纳米二氧化表面的修改,以创建一个核心外流体损失减小器 (FATG).
- 在超细无粘土的水基钻井液配方中应用FATG.
- 性能评估包括过损失,表面粘度 (AV),高温 (220°C) 老化试验和透性恢复评估.
主要成果:
- 在无粘土钻井液中,FATG将过损失降低到8.2mL,AV降低到22mPa.
- 添加 sepiolite 进一步降低了过损失,达到 3.8 mL.
- 液体保持了良好的盐分耐受性和热稳定性,在220°C老化15天后,过损失仅为9毫升,形成更薄,更密集的泥蛋糕.
结论:
- 开发的FATG添加剂显著提高了无粘土水性钻井流体的性能.
- FATG提供卓越的流体损失控制,悬浮稳定性和储保护,特别是在高温和盐度下.
- 该研究为开发先进的钻井流体系统提供了有价值的见解,以应对具有挑战性的水库条件.
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