Abstract: There have existed different opinions upon the provenance of the Xiaermen oilfield, Henan. Previous interpreta-tions suggest either a southeast, or a north, or a northwest source area, and this has severely restricted explo-
ration and development performance in the oilfield. On the basis of a comprehensive study of the paleogeo-morphologic and sedimentologic character of Xiaermen area, an analysis of the previous interpretations is made in this paper. And it is then pointed out that, from the deep sequence to the shallow sequence, the sediment supply has changed from coming from a southeast provenance to coming from a northwest provenance.

Key words: Xiaermen oilfield, Provenance, Direction, Evolution