| On the basis of subdivision of stratum, using the granularity analysis ,chonolith-slice , slice arbitration, scan-lens, as well as the water-drive-oil experiment and micro-facies analysis, the present study is aimed to explain and descript the rock characteristic, rock pore and permeability characteristic , pore space characteristic and micro-seepage characteristic. The study result indicate that the deposit rocks is mainly composed of the fine-grained feldspar sandstone with a somewhat high compositional and textural maturity .The container rock is characterized by the high-imisotropism and their reservoir space is inter-granular pore with a slight complex type of pore and throat ,suggesting the diagenetic stage still remain between the B-eogenetic and A-post diagenesis . In addition ,the water-drive-oil experiment reveals the average drive oil efficiency in the study area is 56.4%, as a result of being affected by the sedimentary micro-facies and micro-fissure occurred in the region.Depending on the analysis of single well facie , sedimentary micro-facies section and ichnography ,the conclusion in this paper is that the micro-facies are mainly occurred in the submerge distributary channel , estuary dam and distributary bay. And the submerge distributary channel have characteristics with a large scale of deposit and good continuity and long-extend along the main river-way. Besides ,the estuary dam micro-deposit is mainly exposed in the two side of river-way in the form of isolated sand-body and the type I and II reservoir is mainly occurred in the submerge distributary channel and the estuary dam micro-facie in most case.The reservoir kind is mostly in charge of sedimentary micro-facies and diagenesis. At last, the range of one type I reservoir favorable zone and II reservoir favorable zone is pointed out in this paper, according to the direction ,size and type of different period reservoir favorable zone.
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