The Application Of Reservoir Prediction Technique Of Fuyu Reservoir "Dessert" In Yuan 357,Sanzhao

Unconventional oil and gas resources,especially tight petroleum resources,in the northern Songliao Basin are very huge.The Sanzhao Sag is an important oil producing area in the northern Songliao Basin,and the Fuyu reservoir is its main oil producing target.So far,Shengping,Songfangtun,Zhaozhou,and Yushulin oilfields have been found,which have fully demonstrated the good prospects of petroleum resources.In this paper,the "sweet" reservoir prediction for the Fuyu reservoir in Yuan357 in the Sanzhao area will be made.Yuan 357 is located on the nose structure of Zhaoyuan,The overall structure is low in the northwest and high in the southeast.The internal structure of the Fuyu oil layer is basically the same and has good inheritance.In addition,the vertical upper oil layer in this block is few,and the main layer is thick.The oil layer on the plane is controlled by fault blocks and sand bodies.The main layers of different fault blocks are not uniform,but they all develop the main layer,which is suitable for horizontal well development.For the Yuan 357,faults are relatively developed,especially small faults,so improving the ability to identify small faults is the primary task.Therefore,the "spectrum blue" post-stack seismic data frequency raising processing technology was first used to improve the resolution of seismic data and lay the foundation for the subsequent fine research of structural reservoirs;Secondly,carry out structural-oriented filtering,curvature volume and coherence volume processing,and combine the coherence and curvature plane attributes along the layer with the profile to finely identify the faults and confirm the spatial distribution characteristics of the faults;And through the establishment of high-precision velocity field to ensure the accuracy of the structure.On this basis,according to the characteristics of narrow,thin,small and fast channel sand bodies in Yuan 357 of Fuyu,Using a combination of seismic multi-attribute analysis technology and different inversion methods,Through the combination of different inversion methods,the main application of geostatistics wave impedance inversion and waveform indication inversion,to reduce the ambiguity caused by the prediction results,quickly select the favorable areas of tight oil reservoirs,and finally achieve favorable The prediction of sandstone yields more accurate "sweet spot" reservoir prediction results.Finally,combined with the understanding of the reservoir formation rules and combined well-seismic sedimentary microfacies research,based on the completion of drilling,it is confirmed that the oil layer is thicker and the seismic reservoir is predicted to be locally continuously distributed.Horizontal wells are deployed.The Yuan 357 is designed with 12 horizontal well positions.