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本文在大量实验数据的基础上，建立了泥岩排替压力与镜质体反射率之间的函数关系。并以汤原断陷主要油气盖层———始新统—渐新统泥岩为例，利用镜质体反射率研究了其排替压力在平面上的变化规律。
Based on a large number of experimental data, this paper established the relationship between the pressure of mudstone replacement and the vitrinite reflectance. Taking the main oil-gas caprock, Eocene-Oligocene mudstone of Tangyuan fault depression as an example, the changing law of displacement pressure on the plane was studied by the vitrinite reflectance.