Reservoir Distribution Features And Favorable Prediction In Daan Oilfield District45-fuyu Reservoir

Fuyu District45Reservoir has developed advanced water injection and small rowspacing advanced water injection test since2005June, but the overall development of theeffect is not obvious. It mainly reflects that the distribution of sand body is not clear, difficultto establish the effective injection-production displacement. In order to improve the effect ofreservoir development and deepen probe into and perception of oil pools and reservoirs, wecarry on the3D fine seismic interpretation and reservoir prediction. Through the combinationof the conventional reservoir research and Dynamic development phase, improving therecognition of reservoir, we analyzed the main factors that affects development result.The study used cycles-thickness small layer contrast method and high resolutionsequence stratigraphy analysis method, using the drilling, logging, geological data, Fuyureservoir is divided into12small layers,20single layers. Combined with the horizoncalibration of seismic data, carrying out fault recognition and interpretation. The45District ofFuyu reservoir structure is relatively simple that is a monoclinal structure controlled by twomain faults, the small internal fault is not developed. Based on the fine structuralinterpretation, we extract the seismic attributes, through the analysis and comparison, thesum of positive amplitudes of the seismic attributes can basically react changes of reservoir.At the same time we utilize the reservoir inversion technique, the vertical resolution of thelogging data and seismic lateral resolution are combined organically. Based on the inversionresults, combined with the stratigraphic correlation, Under the guidance of the sedimentaryfacies model, we carried out the research on the distribution rule of reservoir, each layer of thetarget area was characterized. According to the need of injection production analysis and thefluvial reservoir architecture theory, carries on the analysis to establish the model of interlayerand stack cutting compound channel and fine dissection of single sand body. Through theinjection production analysis, reservoir physical property was the main controlling factors thataffected the development result of Fuyu reservoir, and the composite channel superimposedrelationship complicated the connectivity of sand body. It also put forward severalcountermeasures according to the characteristics of treatment technology of low permeabilityreservoir. On the basis of the comprehensive study we suggested1wells and found2favorable target areas.