Reservoir's Geological Modeling And Distribution Of Remaining Oil In Yan9 Formation In Ordos Jihuang 32 Block

On account of the main problems existed in the development of Yan9 reservoir in Ordos Jihuang 32 Block of the Jiyuan Oil Field's,making full use of synthesis analysis reservoir geology,well logging and dynamic monitoring data,taking such as sequence stratigraphy,sedimentology and reservoir description for theory guidance,on the basic of establishing a sequence stratigraphic framework and sedimentary facies analysis,the paper emphasizes on reservoir geological model and the remaining oil distribution.The paper made the following main results and understanding:1.Through meticulous division and Contrast studying of stratum,Yan9 reservoir would be parted further in Yan911,Yan912,Yan921,Yan922.On the basis of division to analyze the characteristics of subzones.The stratum thickness of each subzone is well-distributed,and the thickest one on average is Yan922.2.In combination with regional geological background and according to well logging,the main type of sedimentary facies of Yan9 reservoir is the braided fluvial river,vertically evoluting to meandering river,including channel-fill deposit,channel bar,interchannel and point bar deposit four sedimentary microfacies.3.Analysis heterogeneity characteristics.The reservoir heterogeneity of Yan911 and Yan921 are stronger,because the migration of the channels are frequent,and the interbeds are more and thin.While the interbeds of Yan912 are less and thick,the reservoir heterogeneity of it is weak,and the one of Yan922 is medium.4.Using the stochastic methods of Sequence Indicator Simulation and Sequence Gauss Simulation to establish the geological models of Yan9 reservoir.Each physical parameter model is consistent with sedimentary characteristics and sand bodies distribution.The models show that properties of subzone Y912 and Y921 are relatively better,high porosity and permeability is respectively distributed in Feng19 Area and Feng35 Area.5.In the research on the basis of the characteristics of reservoir,forecast three remaining oil favorable blocks:Feng19 Area?Feng3-17 Area and Feng35-67 Area.