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运用地表露头、测井曲线和岩心相结合的方法，分析了吐哈盆地台北凹陷侏罗系层序地层特征，将侏罗系划分为３个一级层序、７个二级层序、１３个三级层序。每个三级层序中，湖侵体系域由退积的准层序组成，高位体系域由进积的准层序组成，由退积作用向进积作用的转换过程形成了加积的准层序组，低位体系域在本区不发育。研究发现，同一沉积体系在不同体系域内相序不同，三角洲沉积体系在高位体系域内是正常相序，而在湖侵体系域内是“顶底倒置”的相序。稳定的厚煤层在湖侵体系域内比高位体系域内更为发育。
The characteristics of the Jurassic sequence stratigraphy in the Taibei Sag of the Turpan-Hami Basin are analyzed by means of a combination of surface outcrops, well logging curves and cores. The Jurassic is divided into three first-order sequences, seven second-order sequences, and 13 second- A three-level sequence. In each third-order sequence, the lacustrine system tract consists of the quasi-sequence of retrogradation, and the high-level system tract consists of progradation of quasi-sequence, and the accretion of quasi-sequence Sequence group, low system tract in this area is not developed. It is found that the same sedimentary system has different phase sequences in different system domains. Delta sedimentary system is normal phase sequence in the highstand system tract and “top-bottom inversion” phase sequence in the lake intrusion system tract. The stable thick coal seam is more developed in the lacustrine system than in the highstand system tract.