Abstract: Well Tai-13 area in North Santai field in Junggar basin is located in east part of FuDONG fault belt near Bogeda mountain, belonging to piedmont thrustfault belt. At present, oil is found in Badaowan formation, showing good prospect for petroleum exploration in this area. However, this area is characterized by complex structure, poor seismic data quality, few drilling well, difficult prediction of glutenite reservoir extension direction, so these give rise to big barriers for well location deployment and effective development in this field. Based on fewer drilling data, previous researchers plotted the sand body isopach map, predicting that its paleocurrent direction was from the south to the north, the source came from Bogeda mountain in its south. According to these, integrated with vicinal outcrop studies, drilling data and regional geologic setting, the paleocurrent direction and sand body extending direction are studied in this paper. The results show that in period of Badaowan formation in Well Tai-13 area, the paleocurrent direction was trending from NE to SW, the channel sands extending from NE to SW; the source should come from Qitai swell in eastern Junggar basin.

Key words: Junggar basin, Santai area, Badaowan formation, paleocurrent direction, sands extending direction