Green Two Section's Sand Group Of Sedimentary Microfacies And Favorable Target Area Optimization In Da Qing Zi Jing Of Jilin Oilfield

Daqingzi area's green two section has some problems such as the contradiction in layered,the lack of fine reservoir characterization,complex oil-water distribution,on the basis of these,how to select favorable area is the difficulty and emphasis.Based on the above problems,this paper uses The trunk closed profile of standard layer,signs and classification comparison,Contrast pattern of fault,contrast pattern of the sedimentary thickness,contrast pattern of flood and river flooding surfaces as a guide,well combined,Step by step partition closed and Gradual open method to divide and contrast the 1918 Wells in the studied area's edimentary period time.Divided into two groups and 10 depositional time unit and established of single phase rivers fine stratigraphic isochronous trellis.Putting forward the strata sedimentary characteristics.is that the thickness of the southwest is thin and northeast is thick,the middle is most thick,the second is east and the west is thinnest.?Within the isochronous stratigraphic framework,through coring well data for the analysis of sedimentary microfacies types and characteristics,identify one kind of the phase,4 kinds of microfacies,13 kinds of energy unit,combined with the feature of electric logging to establish well logging microfacies model.Combining the predecessors' research results and the cognition,emotion that daqingzi area's green two section's ? and ? sand group is southwest powcan source.Development zone surface anatomy and small layers of sedimentary microfacies are sedimentary microfacies study,reveal the objective interval is far source gentle slope along the concave type meandering river delta sedimentary system.Underwater distributary channel and mouth bar show more than bifurcate zonal distribution,then restore the sedimentary pattern of reservoir and sedimentary evolution sequence.By the study of the physical property,the single sandstone thickness,the microstructure characteristics,formed a whole understanding of the reservoir characteristics.On this basis,comprehensive thickness,porosity,permeability,single sandstone sedimentary micro equal parameters on the classification of reservoir,divided into I reservoir,? reservoir,reservoir? reservoir,iv reservoir,then to determine all kinds of the planar distribution of reservoir.Through Oil-water plane and vertical distribution characteristics of careful research,to determine the oil and water distribution patterns in the study area.On the basis of integrated hydrocarbon source rock,reservoir,cover,trap,migration,and preservation of six elements,the main control factors for oil and water distribution are the reservoir and trap conditions is obtaining,to make favorable target areas outside the proven and controlled reserve areas.Based on this,the classification criteria were established based on reservoir characteristics and trap conditions and oil content,ranking the favorable areas of prediction,It is divided into one kind of favorable area,two favorable areas,three favorable areas.Eventually guide oil and gas exploration and development work.