Abstract: Aiming at the prospecting and developing situation and based on the field reconnaissance, drill core and logging, the reservoir of this area is mainly of arkose with poor compositional maturity, its provenance may be mainly from the granite region and a little may come from the sedimentary and metamorphic rock area，the main pores are intergranular dissolved pore of laumontite and intragranular dissolved pore of feldspar, the influencing factors of the reservoir physical property include material composition of the reservoir, sedimentary micro-facies and diagenesis. The reservoir in this area is divided into four types，the best(type I) and better reservoir(type II) distributed in distributary channels, the mouth bar, or the zone of dissolved pore, all these will be the base for making reasonable plan for furthere development and tapping remaining potential oil.