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通过对影响泥质岩盖层阻止天然气扩散能力因素的分析，认为扩散速度是评价泥质岩盖层自身阻止天然气扩散能力的重要参数。针对实测扩散系数受并点、取心和分析测式等条件的限制，探讨了利用测井资料研究泥质岩盖层自身阻止天然气扩散能力的方法，并将其应用于松辽盆地三肇凹陷青山口组泥岩盖层阻止扶、杨油层天然气扩散能力的研究中，得到该区青山口组泥岩盖层具有较好的阻止天然气扩散的能力，充分表明它是一种有效的研究泥质岩盖层阻止天然气扩散能力的方法。
Based on the analysis of the factors influencing the ability of caprock to prevent natural gas diffusion, the diffusion rate is considered as an important parameter to evaluate the ability of caprock cap to prevent natural gas from diffusing. In view of the fact that the measured diffusion coefficient is limited by merging points, coring and analyzing the measuring conditions, the method of using log data to study the ability of mudstone cap to prevent natural gas diffusion is discussed and applied to the Sanzhao depression of Songliao Basin In the study of the mudstone capstone of Qingshankou Formation which blocks the natural gas diffusion ability of Fuyang and Yanglou formations, the mudstone capstone of Qingshankou Formation in this area is better able to prevent the gas from diffusing, which fully shows that it is an effective method for studying mudstone cap Layer to prevent the proliferation of natural gas methods.