Fine Structure Interpretation And Potential Reservoir Distribution Of Fuyu Oil Layer In Northern Honggangbei Area Of Songliao Basin

The northern part of the Honggang Area lies in the northwestern part of the DaanCity,Jilin Province, in the central part of the depressional area of the southern part ofthe Songliao Basin-the mid part of the Honggang Terrace. The slope area of basin andstructure of the syncline area has already shows a large output and great potential.But, as for the low thickness, the poor physical properties, low production，thevertical wells can’t achieve good results Therefore, it requires to make a further finestructure interpretation, reservoir prediction and the prediction of the advantageousdevelopment area for the next step that is based on the development of horizontalwell.According to the previous researh result, combining with the log data,coredata,seismic data and of the drilling hierarchical data, The paper makes detailcontrast of layers,the sedimentary facies division,structural interpretation, reservoirprediction, the analysis of reservoir forming characteristics. Finally, the favorabledevelopment is forecasted.1.In terms of the actual condition, methods that include log interpretation,seismic section and regional marker bed are taken.On the basis of drilling geologicalstratification, the author makes a detail correlation of reservoir bed about the layers ofthe forth member of Quantou Group. The results showed that Fuyu reservoirformation develop completely and its formation thickness is gradually increasing fromnorth west to south east direction.2.According to petrology signs,the marks of logging facies and seismic facies,the paper holds that the main developed deposition is delta front subfacies deposition,the second is the delta plain subfacies and delta subfacies only develops in thesouthern part of the strata in the study area. Since provenance located northwest of thestudy area, the delta plain and the prodelta spreads towards southeastern. 3.In sun workstation, the Landmark is used to interpret the3d seismic data thatincluding the wavelet extraction, synthetic seismogram, horizon calibration, the deeptransformation and structural mapping. The result show that the structural of the studyarea as a whole is always inclined structure, nearly ns-trending distribution of twoslope sandwiched a hollow shape. The overall shape is high and steep on both sides,relatively low in the middle.4.On the basis of the analytic hierarchy process to multi-information fusion, the12small layer reservoir prediction was completed by analyzing the main frequency ofseismic data, the resolution, the analysis of seismic attribute parameters and using theproposed acoustic inversion method that based on the fractal dimension.5. On the basis of predecessors’ research, through analyzing of the accumulationcharacteristics in the study area, the plane distribution of reservoir was completed.Theprediction of favorable zone was completed on the basis of the division ofsedimentary facies, fine structure interpretation and seismic inversion of reservoirprediction results. The regions between H87-2and H87-8,in11small layer, betweenH87-7,H88-2and D31-1in9small layer,between H90-and D41in5small layer arethe potential ones by the research.