| Shengping oilfield is located in the northeast of central depression of Songliao basin. Under the guide of sedimentology and sequence stratigraphy, this paper studies the sedimentary facies and sedimentary micro-facies and makes it clear that the oil-water distribution and sand boy distribution, and forecasts the favorable reservoir distribution. Research results are achieved as following.1. Based on the analysis of the data of drilling and logging curves more than 100 wells and researching on the sedimentary facies and microfacies of single well, the reservoir of Fuyu 3 and Fuyu 2 oil layers deposited in meandering river, while Fuyu 1 oil layer accumulated in delta plain facies.2. In the section undivided by faults, the distribution of oil and water is controlled by gravitational differentiation. The oil lies on the top and the water is at bottom and oil-water layer in the middle of oil reservoir profile. Because of inconsistency of the oil and water layers, the sand body distribution and fault cutting, the oil-water interface in the structure is discontinuous as well. There is not uniform oil-water interface in the oil field.3. Jason software was used to inverse the Fuyu oil layers in the whole region. The results show there exists speed difference between the upper and the lower in the area and the threshold value of sandstone estimated by using the different acoustic impedance. The reservoir heterogeneity is very high. The thickness, porosity and permeability of sandstone in the north are significantly better than those in the east and west.4. Based on the analysis of sedimentary microfacies, sand body thickness and effective thickness, porosity, permeability, heterogeneity and oil-water distribution using analytic hiberarchy fuzzy mathematics and PetreL software platform, the favorable reservoir areas have been divided into four blocks: Block Sheng 66, Block Shengshen 6, Block Fang 29 and Block Sheng 163.
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