车古20潜山断层侧向封闭有3种模式,即岩性对接封闭、泥岩涂抹封闭和断裂带高排替压力封闭模式.通过岩性对接剖面和泥岩涂抹因数对3种封闭模式进行了综合评价.结果表明,主力油层层段内潜山内幕断层开启的多,封闭的少,油层的连通性好,车古20潜山为层状油藏且大面积连片. There are three modes of lateral sealing of the Chegu 20 buried hill fault, that is, lithologic docking closure, mudstone smearing and sealing, and high replacement pressure seal mode of fault zone. The three closure modes are integrated through lithologic docking profile and mudstone smearing factor The results show that the buried faults in the main oil layers are more open, less closed and the reservoir connectivity is good, and the Chegu 20 buried hills are layered reservoirs with large area contiguous.