准噶尔盆地西北缘二叠系乌尔禾组隐蔽圈闭

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

SUBTLE TRAPS IN THE NORTHWEST MARGIN OF JUNGGAR BASIN

The Permian Wuerhe Formation in the northwest margin of Junggar Basin is a complex petroleum system with both source rocks and reservoir rocks. In this paper, by way of seismic stratigraphy combined with palaeogeology as well as some other scholars' achievements, the authors make a deep research in subtle traps of the Wuerhe Formation in this area. The conclusion is that lithological subtle traps based on the dominant facies, that is fan delta and multiplex traps controlled by more than one factor such as structure, stratum, and so on, are developed in this formation. It is widely accepted that there are abundant source rocks in this area, but structural traps are not so many, so that favorable subtle traps must play an important part here and make it a prospective area for exploration in Junggar Basin.