Reservoir Architecture And Modeling Of Braided River Delta Facies In Qie6 Area Of ??Kunbei Oilfield

This thesis takes the reservoir geology,logging geology,reservoir description,industrial geology of petroleum,sedimentary petrology,petroleum geology and other related disciplines as the theoretical basis,adopts synthetically the information of core analysis,logging and logging data,and applies the principle of stratigraphic correlation of the "half amplitude point";comprehensive interpretation of geological and logging facies;analytic hierarchy process of configuration interface,the method of the combination of configuration unit,multi-dimensional-interactive research ideas of braid river delta configuration modeling to the study of stratigraphic framework,sedimentary microfacies,reservoir architecture,reservoir architecture modeling respectively.The following results have been achieved:In accordance with the principle of the stratigraphic correlation of "half amplitude point",and with the method of the high resolution sequence stratigraphy,marker bed,curve shape and its combination,this research has finished the stratigraphic division and correlation of sand group and small layer in Qie 6 area of Kunbei oilfield,and subdivided the lower formation of low-Ganchaigou(E31)into 7 layers,the Lulehe formation(E1+2)into 21 layers.This method has completely overcame the defects of the current way with the "maximum value of natural gamma and positive anomaly spontaneous potential" that has messed the reservoir with barrier,thus greatly improving the accuracy of modeling.Based on data of core analysis and well logging interpretation,and with analysis of lithological types and distribution characteristics of barrier and interlayer in the research area,this thesis thinks that the lithology of barrier is mainly mudstone,followed by dense glutenite;The thickness of barrier changes greatly in the plane,but it changes bigger in E31 than that of in E1+2;There are both lithologic and physical sandwich in the research area,but plane distribution rule is not strong.With the relationship between the returning eigenvalue of permeability and the interlayer thickness,this thesis has made the interlayer identification chart,defined the standard to identify sandwich in Qie 6 area.According to the information of regional distribution of heavy minerals and paleocurrent direction,this thesis holds that the Lulehe formation and lower formation of low-Ganchaigou in the research area are controlled by the provenance from the Qimantag and Aral mountains.On this basis,with a comprehensive analysis of the facies markers like lithology,grain size,sedimentary structure,sedimentary sequence and logging curve,this thesis thinks that the research target develops mainly braided river delta,in whih braided river delta plain and braided river delta front is the most developed subfacies,and identifies 7 sedimentary microfacies:overwater distributary channel,flood plain and distributary channel,mouth bar,distal bar,sheet sand,interdistributary area.In the plane,from southwest to northeast,it has a macro feature varying from braided river delta plain to braided river delta front;while vertically,from top to bottom,it shows.a sequence feature.of retrogradation type and positive cycle varying from braided river delta front to braided river delta plain.According to the features of lithology and well logging curves,this thesis has studied the interface classification configuration unit,and lithofacies types of reservoir,and 39 kinds of lithofacies are divided;further more,this thesis has focused on the causes and characteristics of configuration unit type,comprehensively summarized the contact relation and plane distribution characteristics of 12 different configuration units,and picked up 6 kinds of configuration modes.Based on comprehensive interpretation of geological,seismic.and logging data,it has created the structure model for the research area using the "Mstandard-layer-control" and inverse distance weighted average method of interpolation;and with the analysis results of geological and logging facies,the reservoir(facies)and barrier model has been established using detenministic modeling methods;through the variogram function analysis,the interlayer model is built by the stochastic modeling method of sequential Gauss simulation;in the common control of sedimentary facies model and interlayer model,the porosity,permeability and oil saturation model is established using the stochastic modeling method of sequential Gauss simulation.