Inhibiting the surface hydration of shale formation using preferred surfactant compound of polyamine and twelve alkyl two hydroxyethyl amine oxide for drilling
Inhibiting the surface hydration of shale formation using preferred surfactant compound of polyamine and twelve alkyl two hydroxyethyl amine oxide for drilling
复制标题
使用聚胺和十二烷基二羟乙基氧化胺的优选表面活性剂化合物抑制页岩地层的表面水化用于钻井
DOI：
10.1016/j.petrol.2017.10.006
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发表时间：
2017-11-01
影响因子：
--
通讯作者：
Li, Xuan
中科院分区：
文献类型：
--
作者：
Huang, Weian;Li, Xiong;Li, Xuan
泥页岩地层钻井过程中，泥页岩表面水化对井壁稳定性有严重影响。本文提出了一种通过测定真实的接触角来测量页岩粉润湿性的新方法。采用Zeta电位、单轴抗压强度、泥页岩稳定性指数、表面水化水、线膨胀率、岩屑热滚分散实验等方法对表面活性剂的抑制作用进行了评价。同时，利用傅里叶变换红外光谱（FT-IR）和X射线衍射分析（XRD）研究了表面活性剂与页岩颗粒之间的相互作用。结果表明，合适的表面活性剂可以抑制页岩的表面水化。PA和THAO复配的表面活性剂具有较强的表面水化抑制和抑制渗透水化的能力。这是因为该化合物吸附到泥页岩颗粒表面后，能增强泥页岩颗粒表面的疏水性，通过置换粘土层间的无机阳离子抑制渗透水化，从而降低zeta电位，将粘土胶凝在一起。
The surface hydration of shale has severe effect on the wellbore stability during drilling through the shale formation. In this paper, a novel method was developed to measure wettability of shale power by determining real contact angle. A variety of methods including measurements of Zeta potential, uniaxial compressive strength, shale stability indexes, surface hydration water, linear swelling, and cuttings hot-rolling dispersion experiment were used to evaluate the inhibition of surfactants. Meanwhile, Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction analysis (XRD) were used to investigate the interaction between surfactants and shale particles. Results revealed that the surface hydration of shale could be inhibited by using suitable surfactants. The surfactants compound of PA and THAO possessed stronger surface hydrating inhibition and capacity of restraining osmotic hydration. This is because the compound can enhance the surface hydrophobicity after adsorption onto the surface of shale particles, restrained osmotic hydration through swapping out inorganic cations in the clay interlayer, thus reducing the zeta potential and bounding clay gall together.