三叠系是吐哈盆地油气勘探的重要层系,1996年以来将鲁克沁三叠系油层改归中三叠统克拉玛依组。以陆相盆地构造和气候的周期性变化控制层序地层为立足点,结合地震和钻、测井信息,分析了区域地层横向变化规律,探讨了地层测井响应的内在机理。认为,小泉沟群内部区域性的不整合是划分中、上三叠统的自然界线,再次将鲁克沁三叠系油层时代还原为晚三叠世。 Triassic is an important reservoir of oil and gas exploration in the Turpan-Hami basin. Since 1996, the reservoir of the Rukqen Triassic has been changed to the Middle Triassic Karamay Formation. Taking the control of sequence stratigraphy as the basement, the paper analyzes the regularity of lateral stratigraphy variation and discusses the internal mechanism of formation logging response. It is considered that the regional unconformity within the Koizumi Gully is the natural boundary dividing the Middle and Upper Triassic, and once again the age of the Triassic oil layer of the Ruqqin is reduced to Late Triassic.