准噶尔盆地西北缘二叠系乌尔禾组地层是既有烃源岩又有储集岩的复合含油气系统。作者采用现代地震地层学方法 ,通过对地震资料、地质演化历史等资料的研究 ,并综合前人的研究成果 ,对乌尔禾组隐蔽圈闭进行了较深入的研究 ,认为该层主要发育基于扇三角洲沉积相的岩性型隐蔽圈闭 ,以及受岩性、构造等因素共同控制的隐蔽圈闭。该地区油源丰富 ,但构造圈闭不发育 ;因此 ,在准噶尔盆地西北缘研究和勘探隐蔽圈闭十分重要 The Permian Wuerhe Formation in the northwestern margin of the Junggar Basin is a composite petroleum system with both source rock and reservoir rock. By means of modern seismic stratigraphy method, through the study of seismic data, geological evolution history and other data, combining with the previous research results, the author makes a deep research on the hidden trap of Wuerhe Formation. The main development of this layer is based on The lithologic trap of the fan delta sedimentary facies, as well as the subtle trap co-controlled by lithology, tectonics and other factors. The area is rich in oil resources but structural traps are undeveloped; therefore, it is important to study and explore subtle traps in the northwestern margin of the Junggar Basin