Study On Reservoir Characteristics In S₃² Sub-member Of Shen161 Block

Shen 161 block is an important development and regulation old area of Damintun sag in Liaohe oilfield in recent years, and S₃² sub-member oil reservoir as the interest layer of this study. This paper focus on the analysis of reservoir features in the block to study the potential of remaining oil better.Based on 3D seismic data and logging curve data, fully collecting the previous rSearch rSults, in this paper we builded the stratigraphic framework of S₃²sub-member in Shen 161 block and finished the stratigraphic division and correlation.Shen 161 block can be divided into 4 oil reservoirs, 26 sandstone groups and 58 small layers. Combined with the existing data, using well-seismic combination and static-dynamic combination,we carried out tectonic fine interpretation. We made a comprehensive analysis of structural characteristics of S₃² sub-member in Shen 161 block and interpreted 8 faults in this area, It consists of two kinds about a nearly east-wSt and north-south and all of them are normal faults in the sand of S3.On the basis of the analysis of regional geological rules and based on the analysis of the model of electrofacies,we launched the study of the fan delta microfacies of shen161 block and established homologous microfacies map, forecasted through tendency of sand body. From the aspects of reservoir characteristics,physical property and heterogeneity of reservoir petrology, we found that the quality of the reservoir is closely related to the sedimentary microfacies. It belongs to low porosity and low permeability and strong heterogeneity of reservoir. Finally, we analyzed the characteristics of the reservoir such as temperature and pressure system, reservoir distribution, oil water distribution and reservoir type in Shen 161 block, understood of reservoir formation and distribution of oil and water in the deep area and implement favorable oil range. In order to provide geological basis for accelerating the development of the old oil field,we adjust the stable production and reserves.