Reservoir Prediction And Sedimentary Microfacies Of Pu I3 Unit In The West Of Daqing Xing Five To Seven

Xing five to seven blocks are located in the northern Songliao basin,the research layer belongs to Putaohua reservoir group.the area is given priority to with delta front sedimentary system.Putaohua reservoir has “single thin sand body,severe channel erosion”.Affected by multiphase rivers,it is difficult to identify the sedimentary unit of Putaohua reservoir.according to these characteristics in this paper.In this paper,based on the theory of sequence stratigraphy,the logging curve of the cycle characteristics and the sedimentary unit of the stratigraphic characteristics,the 1?3 reservoir of the Putaohua I oil group are subdivided into 8 small layer units,re-adjusting the small layers in the whole area based on logging phase for the 1?3 reservoir of Putaohua I oil group.The Pu I3 sedimentary unit subdivision comparison study was conducted.Using the well seismic calibration,set up isochronous stratigraphic framework,and the coherence and small layer trend surface method help layer and fault interpretation.Establish a deep transformation,the velocity field of space-variant complete Putaohua reservoir internal structure figure of four reflector.Analyze the structural characteristics of the reflector through the two directions of plane and profile.The reservoir prediction mainly relies on seismic inversion technology,aiming at the problem that the conventional inversion method can not realize the accurate prediction of thin sandstone,this paper uses curve reconstruction technology to improve.Through the selection of inversion methods,improving the seismic sampling rate,inversion parameter optimization and other means to assist,and finally achieve inversion.By observing the minimum thickness of sandstone that can be identified by the inversion profile to see if the purpose of improving resolution is achieved.Comprehensive analysis of the sedimentary background of study area,to study the distribution characteristics of sedimentary microfacies by analyzing the types of single-well phases and logging phases.On the basis of known well point information,combining with the thickness of sandstone prediction and inversion slice to help completing characterization of sedimentary microfacies.Analyze the plane features of sedimentary microfacies,and then analyze the sedimentary evolution model.The pool type of Putaohua reservoir is dominated by structure-lithology pools.Fault density zone and channel direction control the distribution of the pools.Comprehensiveresearch the structure characteristics,reservoir characteristics and pool characteristics,predict the favorable zones of the three destination layers of the study area,Pu I31,Pu I32,and Pu I33.