简述长岩芯实验确定油层污染关系的基本原理和基本实验过程，分析长岩芯实验确定地层侵入深度和污染深度的方法，并通过实验数据分析指出：地层侵入深度大于污染深度，泥浆颗粒对地层造成的损害大于泥浆滤液对地层的损害。 This paper briefly describes the basic principle and basic experimental process of determining the relationship between oil pollution in the long core experiment and analyzes the method of determining the depth of intrusion and the depth of contamination by the long core experiment. According to the analysis of experimental data, it is pointed out that the depth of formation invasion is greater than the depth of pollution, Formation damage is greater than mud filtrate damage to the formation.