本文根据航磁、重力资料的研究和分析 ,对伊犁盆地中部基底结构及起伏变化、构造特征提出了一些看法 ,并从地球物理场特征进行了阐述 ,尤其对盆地西部二叠系的厚度及分布范围进行了确定 ,这对今后以此为目的层进行油气勘探提供了依据。同时根据盆地的演化 ,对盖层的发育特点进行了探讨 Based on the research and analysis of aeromagnetic and gravimetric data, some suggestions on the basement structure, undulation and tectonic features of the central Ili Basin are proposed and the characteristics of the geophysical field are expounded. In particular, the thickness and distribution of Permian in the western basin The scope has been determined, which provides the basis for future exploration of oil and gas for this purpose. At the same time, according to the evolution of the basin, the developmental characteristics of caprock are discussed