新型超高温页岩抑制剂特性实验研究

发布时间：2018-01-17 15:41

  本文关键词：新型超高温页岩抑制剂特性实验研究　出处：《钻井液与完井液》2017年01期 　论文类型：期刊论文

  更多相关文章： 超高温钻井液 页岩抑制剂 胺类 疏水 封堵

【摘要】：为满足超高温深井钻井工程的需要,提升抗高温水基钻井液的抑制页岩水化能力,研选了一种新型超高温页岩抑制剂HT-HIB该抑制剂分子结构与聚醚二胺类似,端部含有2个胺基,但分子链为刚性的环烷基。通过抑制膨润土造浆实验、页岩滚动分散实验、页岩膨胀实验、压力传递测试、X射线衍射分析黏土层间距、Zeta电位测试和热重分析等,综合评价了该页岩抑制剂的抑制性能,并揭示其作用机理。结果表明,HT-HIB能抑制泥页岩水化膨胀和分散,并可在一定程度上阻止压力传递,作用优于目前高性能水基钻井液中使用的聚胺抑制剂;同时HT-HIB可在220℃下保持性能稳定。HT-HIB通过端部的胺基单层吸附插入黏土层中,破坏黏土表面水化层结构并排出层间水分子;黏土表面吸附HT-HIB后亲水性显著降低,从而阻止了水分子的吸附;此外,HT-HIB的溶解度随pH值变化,可使HT-HIB从溶液中析出并堵塞页岩微孔隙,也有利于阻止液相侵入。总之,HT-HIB借助化学抑制、润湿反转以及物理封堵协同作用,因而表现出突出的抑制性能,为开发新一代抗高温高性能水基钻井液打下了基础。
[Abstract]:In order to meet the requirements of ultra-high temperature deep well drilling engineering, the anti-high temperature water-based drilling fluid can improve the ability of inhibiting shale hydration. A novel ultrahigh temperature shale inhibitor, HT-HIB, was selected. The molecular structure of the inhibitor is similar to that of polyether diamine, with two amino groups at the end, but the molecular chain is a rigid naphthenic alkyl. Shale rolling dispersion test, shale expansion test, pressure transfer test, X-ray diffraction analysis of clay layer spacing, Zeta potential test and thermogravimetric analysis were used to evaluate the inhibition performance of the shale inhibitor. The results show that HT-HIB can inhibit the hydration expansion and dispersion of shale and to some extent prevent the pressure transfer. The effect is superior to the polyamine inhibitor used in high performance water-based drilling fluid. At the same time, HT-HIB can keep the stability at 220 鈩，

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