Abstract: This paper discusses the buried-hill development in northeastern Jiyang Depression from the perspective of tectonic movement. It is pointed out that the buried-hill development in the area has experienced tectonic movement for several times, such as the Indochina movement, the Yanshanmovement, and the Himalayan movement. According to the effect of fault movement on buried-hill development and the structural location of buried hills, the buried hills in the area are classified into five types, i.e., the gentle-slope block fault buried hill, the steep-slope detachment buried hill, the monadnock buried hill, the buried hill shapes like a hill over the slope, and the strike slip nappe buried hill. Horizontally, the buried hill in the area has the laws as follows: Hydrocarbon enrichment of the lower uplift is higher than that of the uplift, but it is lower than that of the buried hill. It is the highest in the buried hill next to the boundary of oil sags and faults.

Key words: Jiyang Depression, buried hill, structure, hydrocarbon enrichment law