Geological Modeling And Microscopic Remaining Oil Studying Of Chang2Oil Reservoir Set In Ding1184Area Of Dingbian Oil-field

Ding1184area of Chang2reservoir in Dingbian oil field has entered the stage of high watercut and later development,the reservoir is heterogeneity.So it needs to establish a fine3-D geological model that can reflect the3-D spatial distribution of the reservoir physical parameter;and As the development continues to impact, remaining oil distribut complex, so in order to guide the further development of the oil field and to tap remaining oil on the latter part,this paper studys on the mechanism of microcosmic remaining oil distribution.Draw on the studies of predecessors,the author has studyed the geological foundation,including fine stratigraphical division,depositional microfacies characteristics and reservoir characteristics.Based on which,by a large number of well drilling,well logging,analysis of test data and dynamic data to constrain,with the petrel modeling software,using the methods combined deterministic modeling with stochastic modeling, this paper adopts ordinary kriging method to build up the structure model of the top surface of the layer;And later, ends up the layer rock-phase modeling by sequential indicator simulation algorithm;At last, sets up petrophysical property modeling by sequential Gaussian simulation method under the control of sedimentary facies,that includes porosity modeling, permeability modeling and water (oil) saturation modeling. Throught probability distribution consistency and compare with the manual geological plane map to test the reliability of the modeling that had built,the results show that the simulation data faithful to the well-point data,and it is greater consistency between Geological models and manual geological plan map;Porosity modeling、permeability modeling and water (oil) saturation modeling that implemented by facies-controlled modeling are constrained by the sedimentary microfacies. The model reflects the actual geological conditions of the study area more true,and it can provide a reliable geological basis for layer potential tapping and well pattern infilling adjustment at production tail of the study area.Establish the3-D geologic model is a prerequisite for simulation of remaining oil,and the purpose of simulation of remaining oil is to get residual oil distribution. Therefore, this paper from the micro-perspective study on the mechanism of microcosmic remaining oil distribution on the basis of the established geological model.This paper does the experiments—water-oil displacement with the Micro-model that uses of sandstone slice. Through observation of the various phenomenas and analysis of experimental results,indicates that the reservoir heterogeneity of pore structure is the main control factors of the formation of microscopic remaining oil of the study area.