泥页岩比表面积与泥页岩水化特性、力学性质以及渗水性密切相关,是评价泥页岩井壁稳定性的关键参数。实验研究证明,EGME法和亚甲基蓝吸附法是重复性好、准确可靠的泥页岩比表面积测定方法。其中,亚甲基蓝法更简便易行。亚甲基蓝法测定比表面积主要与吸附时间、动静状态、岩样粒度及离子交换预处理等因素有关,特别是受亚甲基蓝溶液初始浓度的影响最显著。 The specific surface area of ​​shale is closely related to the hydration characteristics, mechanical properties and permeability of shale, which is a key parameter for evaluating the stability of shale lining. Experimental results show that EGME method and methylene blue adsorption method are reproducible, accurate and reliable method for determination of specific surface area of ​​shale. Among them, the methylene blue method is more simple and easy. Methylene blue method to determine the specific surface area and adsorption time, dynamic and static state, particle size and ion exchange pretreatment and other factors, especially the initial concentration of methylene blue solution most significantly.