Abstract: Abstract：The internal configuration of the reservoir is the key geological factor to control the distribution of remaining oil.
This paper makes a detailed study on the characteristics of batture bar of braided river based on the analysis of the core data and
the logging data. According to previous researches and the deposition law of batture bar，the internal architecture model was
concluded. The batture bar can be divided into four parts including the head，the tail，the wings and the main in the horizon，and
it can also be divided into three parts including the vertical accretion body，the off silt layers and the vertical accretion surface
in the vertical. The off silt layers of Guantao formation mainly consist of physical intercalation and mud intercalation in Gao
Qiannan area，and there are little or no development in the head，but a certain amount in the wings and the tail. The inclination
of the off silt layers is smaller in the tail，with an average inclination of 0.8°，and larger in the wings，average inclination 4°.
The thickness of vertical body varies greatly，usually from 0.8 to 3.6 m averaging 1.7 m.

Key words: Key words：braided river, batture bar, off silt layer, internal architecture, Gao Qiannan area