Shale inhibitive properties of polyether diamine in water-based drilling fluid
Shale inhibitive properties of polyether diamine in water-based drilling fluid
复制标题
聚醚二胺在水基钻井液中的页岩抑制性能
DOI：
10.1016/j.petrol.2011.06.003
复制
发表时间：
2011-08-01
影响因子：
--
通讯作者：
Cao, Jie
中科院分区：
文献类型：
--
作者：
Zhong, Hanyi;Qiu, Zhengsong;Cao, Jie
本文研究了聚醚二胺（PEDA）在钻井液体系中的页岩水化抑制性能。通过膨润土抑制试验和体积硬度试验评价抑制效果。结果表明，PEDA的缓蚀性能优于常规缓蚀剂氯化钾，且随着pH值的降低而增强。通过傅里叶变换红外光谱、X射线衍射、zeta电位测量和表面张力分析研究了PEDA的抑制机理。低分子量PEDA添加到钻井液体系中后，可以嵌入到粘土晶格中。质子化的二铵离子交换钠离子并中和粘土层间的负电荷，从而减少了弥散双电层的水合斥力。此外，在此过程中PEDA和粘土表面的二氧化硅之间可以形成氢键。静电相互作用和氢键的协调将水分子从粘土廊道中排出并将板粘合在一起，从而导致粘土脱水。否则，PEDA在粘土层间的单层吸附削弱了粘土颗粒的亲水性，进一步抑制了水的侵入。 (C) 2011 Elsevier B.V. 保留所有权利。
In this paper, the shale hydration inhibitive properties of polyether diamine (PEDA) in drilling fluid system were studied. The inhibition was evaluated by bentonite inhibition test and bulk hardness test. The results indicate that the inhibition properties of PEDA are superior to potassium chloride which is a kind of conventional inhibitor, and can be improved with decrease of pH value. The inhibition mechanism of PEDA was investigated via Fourier transform infrared spectroscopy, X-ray diffraction, zeta potential measurement and surface tension analysis. After being added into the drilling fluid system, the low-molecular-weight PEDA can intercalate into the lattice of clay. The protonated diammonium ions exchange sodium ions and neutralize the negative charges of clay interlayer, which reduces hydration repulsion of diffuse electric double layer. Moreover, hydrogen bonding between PEDA and silica of clay surface can form in the process. The coordination of electrostatic interaction and hydrogen bonding expels water molecules out of the clay gallery and binds the plates together, which leads to the dehydration of clay. Otherwise, monolayer adsorption of PEDA on the interlayer of clay weakens the hydrophilicity of clay particles which further inhibits water ingress. (C) 2011 Elsevier B.V. All rights reserved.