Seismic Interpretation And Reservoir Prediction Of Fuyu Reservoir In Fang 22 Block

Fang 22 block is located in the northern Songliao basin,the area is given priority to with shallow water delta depositional system.Fuyu oil layer has “single thin sand body,poor lateral continuity”,the characteristics of strong shielding effect by T2 reflection interface,internal seismic reflection characteristics of Fuyu oil layer is not obvious,according to these characteristics in this paper.In this paper,based on the theory of high-resolution sequence stratigraphy,the logging curve of the cycle characteristics of Fuyu oil layer division and contrast,the Fuyu reservoir is divided into seven level 4 sequence,and then using the well seismic calibration,set up four longitudinal transverse isochronous stratigraphic framework,and the coherence and 3d visualization technology help layer and fault interpretation,establish a deep transformation,the velocity field of space-variant complete Fuyu reservoir internal structure figure of eight reflector.Error analysis of the structure is used to test the accuracy of seismic interpretation.Fracture is more development in the study area,from the plane and profile fracture characteristics are summarized and the characteristics of trap.Reservoir prediction from two aspects of qualitative and quantitative research.Sensitive attribute optimization conducted by forward modeling,and use the properties of the qualitative analysis of the optimum distribution characteristics of sand body development.The curve on the basis of the standardized and normalized processing,comparison and analysis of various kinds of curve of the sensitivity of the sand clay,identified on the basis of the wave impedance and gamma curve reconstruction curve to better identify sandstone.Using the seismic inversion of reconstruction curve research area,by inoue lithology profile data and reconstruct curve prediction sand body of results,verify the vertical resolution of inversion results.Comprehensive analysis of the sedimentary background of study area,on the basis of single well facies analysis,combining with the thickness of sand body prediction and seismic attributes guide sedimentary microfacies.Water becomes more and more deeper in Fuyu oil group from bottom to top,meandering river-braided river-shallow water delta sedimentary system.F? and F? as meandering river sedimentary system,F?3 to F?2 in braided river sedimentary system,F?1 development of shallow water delta system.Fuyu reservoir oil-water relationship as a whole for the oil to the water,the lithologic reservoirs,reservoir types in structural trap,fault density zone,control the distribution of the reservoir.Comprehensive research the structure characteristics,reservoir characteristics and reservoir characteristics,predict favorable zones for the Fuyu reservoir in the study area.