Abstract To meet the technical requirements of high-temperature deep wells, highly inhibitive, high-temperature-resistant shale inhibitors are essential. This paper reports for the first time the use of amidocyanogen silanol (ANS-1), a newly developed oligomer with an amino siloxane structure, as a potential shale inhibitor. Its inhibitive properties were evaluated by linear swell testing, cutting dispersion testing, bentonite inhibition testing, and mud pellet disintegration testing, and the results were compared with the properties of other current conventional inhibitors. The inhibition mechanism was investigated by X-ray diffraction, adsorption, Fourier transforms infrared spectroscopy, contact angle, zeta potential and transmission electron microscope. The results indicated that ANS-1 can inhibit the hydration swelling and dispersion of water-sensitive clay minerals effectively, performing better than other inhibitors. Furthermore, ANS-1 provides reliable thermal stability as high as 140 °C and has potential application in high-temperature deep wells. ANS-1 can adsorb into the surface of clay, which changes the wettability of the clay surface and increases the resistance of water molecules to bond with the clay. In addition, ANS-1 can intercalate into the clay interlayer, occupying water adsorption sites, and into the interlayer channel, thus inhibiting the hydration swelling of clay. The introduction of siloxane groups in the ANS-1 molecular chain led to a firm chemical adsorption between ANS-1 and clay, which increased the adsorption capacity of ANS-1 at high temperature, thus improving its inhibition performance.

中文翻译：

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氨基氰硅烷醇作为水基钻井液中耐高温页岩抑制剂

摘要 为满足高温深井的技术要求，高抑制、耐高温的页岩抑制剂必不可少。本文首次报道了使用新开发的具有氨基硅氧烷结构的低聚物酰胺氰基硅烷醇 (ANS-1) 作为潜在的页岩抑制剂。通过线性溶胀试验、切削分散试验、膨润土抑制试验和泥球崩解试验对其抑制性能进行评价，并将结果与​​目前其他常规抑制剂的性能进行比较。通过X射线衍射、吸附、傅里叶变换红外光谱、接触角、zeta电位和透射电子显微镜研究了抑制机制。结果表明，ANS-1能有效抑制水敏性粘土矿物的水化溶胀和分散，效果优于其他抑制剂。此外，ANS-1在高达140°C的温度下提供可靠的热稳定性，在高温深井中具有潜在应用。ANS-1可以吸附到粘土表面，改变粘土表面的润湿性，增加水分子与粘土结合的阻力。此外，ANS-1可以嵌入粘土夹层，占据吸水位点，进入夹层通道，从而抑制粘土的水化膨胀。ANS-1分子链中硅氧烷基团的引入导致ANS-1与粘土之间牢固的化学吸附，增加了ANS-1在高温下的吸附能力，