Abstract: Erlian basin belongs to a Mesozoic continental fault group, in which various types of sedimentary bodies could all be found, especial-ly the fan delta and underwater fan sedimentary bodies occured in steep-sided sections of sags. Hence, it has favorable conditions for forming lithologic oil reservoirs. Baolige reservoir in Bayindulan sag is a sandstone lithologic reservoir in fan delta with typical highstand system tract. This paper analyzes the hydrocarbon accumulation conditions in fan delta lithologic sandstone lithologic reservoir area by means of sequence stratigraphy and geology, and develops the geologic model for fan delta lithologic reservoir with highstand system tract in Baolige area. Also, this paper presents some new methods for recognition of seismic information about the fan delta sandbody configuration and prediction of petrolifer-ous features, and finally introduces applied results for its petroleum exploration.

Key words: Erlian basin, geologic model, lithologic reservoir, fan, dela, recognition