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Geological Modeling And Reservoir Numerical Simulation Research

Posted on:2014-01-25Degree:MasterType:Thesis
Country:ChinaCandidate:X GaoFull Text:PDF
GTID:2250330422450153Subject:Computer software and theory
Abstract/Summary:PDF Full Text Request
Geological modeling is the core of the reservoir description.and structure modeling is thebasis of the entire geological modeling and subsequent geological studies.This paper focusedon the fine modeling process of reservoir with faults and level constraints,and implementedthe three-dimensional visualization of reservoir model.On this basis, this study finished thenumerical simulation of the reservoir and realized the history matching of reservoirparameters.The structure modeling of reservoir is divided into three processes,which are consisted oflevel modeling, fault modeling and sequence modeling.In the level modeling,this paperdiscussed the subdivision of Delaunay triangulation mesh and the rectangular mesh,andimproved the insertion point by point of the Delaunay triangular mess subvision.Throughordering these points from smallest to largest by horizental,this methord can quickly found themostly likely triangle which contained the current data when a new data was insered.Based onthe mess subdivision,the next was to analysis the kriging interpolation algorithm withemphasis,and interpolated the unknown points of the entire grid. Then this paper analysisedthe spherical model,the exponential model and the linear model of vagriogram,and improvedthe simulation of parameters in the exponential model. Through Taylor series expansion, theexponential function was converted to linear function, in order to use the least square methodto determine the parameters.The study discussed the weighted average method to generatelinear fault pillar in the fault modeling,and recover the fracture of level modeling.Finally thispaper subdivided the strata according to the sequence grid characterization methods, andanalysised the model of the sequence.On the basis of the structure modeling,this paper analysised the three-dimensionaattribute modeling of geological parameters,which included the porosity, permeability and water saturation,and processed the corresponding roughening. The method of IMPESestablished the shown pressure and the implicit saturatin equation according to thecorresponding mathematical equations and differential equations.The research result showsthat the geological reserve calculated by numerical simulation is consistent with that ofreservoir description; single well formation pressure is basically consistent with the actualformation pressure; the moisture content of production well is basically consistent with theactual moisture content and the fitted values are very accurate.
Keywords/Search Tags:Structure modeling, Kriging interpolatin, Variogram, Attribute modeling, IMPES
PDF Full Text Request
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