Abstract: The gentle slope-break zone in continental fault lacustrine basin is referred to as a depositional slope zone resulted from long-term activity of syndepositional listric faults. It is shown from study of Nanyang seg in Nanxiang basin that the nonplane gliding listric normal faults in southern Nanyang seg allow to shaping gentle slope break zone in northern Nanyang seg, thus constraining the variation of holding spaces in this basin,controlling the distribution scope of low stand system tract and high stand lacustrine delta sands in axial orientation. This paper develops framework of inner stratigraphic sequence of the slope-break zone,studies its features and spatial distribution,determines the low stand shore line of this zone developed in each sequence,from which searches for large scale low stand fans,hence establishes the model for predicting distribution of the low stand,sandstone reservoir. The result can be as guide for, exploration of subtle oil-gas reservoir in Nanyang seg.

Key words: Nanyang seg, fault, deposition, sequence stratigraphy, fan, delta