Abstract

The inhibitors for shale gas can be divided into two categories, including inorganic inhibitors and organic inhibitors. The inorganic inhibitors usually include sodium chloride and potassium chloride, while the organic inhibitors include potassium sorbate, polyethylene glycol, polyetheramine, and diethylenetriamine. The inhibitive properties of these inhibitors for shale gas have been comprehensively compared in detail. The results show that the inhibitive effect of potassium chloride is much better than the other inorganic inhibitor sodium chloride, and polyetheramine exhibits the best inhibitive performance to other organic inhibitors. From the analysis of the inhibition mechanism, it can be found that both inorganic salt inhibitors and potassium sorbate, polyethylene glycol can effectively squeeze out the water molecules, adsorbed within clay layers, through ion exchange. As for polyetheramine and diethylenetriamine, the protonated ammonium ions can be adsorbed onto clay surface through electrostatic interaction to exchange hydrated sodium ions, thereby reduce the hydration repulsion of the clay.

中文翻译：

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水性钻井液中不同缓蚀剂的缓蚀性能比较

摘要

页岩气的抑制剂可分为两类，包括无机抑制剂和有机抑制剂。无机抑制剂通常包括氯化钠和氯化钾，而有机抑制剂包括山梨酸钾，聚乙二醇，聚醚胺和二亚乙基三胺。这些抑制剂对页岩气的抑制性能已进行了详细的全面比较。结果表明，氯化钾的抑制作用远优于其他无机抑制剂氯化钠，而聚醚胺对其他有机抑制剂表现出最佳的抑制作用。从抑制机理的分析中可以发现，无机盐抑制剂和山梨酸钾，聚乙二醇都可以有效地挤出水分子，通过离子交换吸附在粘土层中。对于聚醚胺和二亚乙基三胺，质子化的铵离子可以通过静电相互作用吸附到粘土表面，以交换水合的钠离子，从而降低粘土的水合排斥力。