The Research Of Reservoir Configuration Of The Middle Two Section 28-8 Well Field In Gudao Oilfield

Gudao oilfield locates Dongying city Shandong province,is dissertation gives an example how to study the heterogeneity of fluvial facies reservoir by modeling the Gudao oilfield middle two section 28-8 well field in upper part of Guantao formation and establishs tectonic model on the basis of the fine stratigraphic classification. proceeds interpolation and the thesis forecasts the distribution of sediment microfacies among the wells and establishs facies model by the sequential indicator simulation (SIS) analogue method.Under the conditions of facies controlling, establishs reservoir tridimensional geological model by the sequential gauss simulation(SGS) analogue method. This model supplies refined geological model for numerical reservoir simulation and provides credible geological reference for the goal of oil collection stabilizing and water controlling, tertiary recovery.Firstly, the strata of the third and fourth sands group in the upper Guantao Formation give stratigraphic classification and correlation.The third sands group divides five sublayer and subdivide ten rhythmic layering.The fourth sands group divides four sublayer and subdivide eight rhythmic layering.Secondly, this research zone develops three kinds microstructure.In this microtectonics deploy mode, the tip convex bottom flat type is remaining oil abundance zones; the remaining oil of the tip flat bottom convexity type is lesser than the former; the convexo-convex type is the relatively abundance zone of remaining oil; the production of the tip kick flat type is poor; the concavo-concave type is most in drowning degree.Thirdly, the research zone develops four kinds subfacies and seven kinds microfacies. Ng44,Ng42 and Ng33 depositional periods develop mainly channel deposit; hydrodynamic condition is from weaker to stronger,then to weaker; sands thickness is from thin to think ,then to thin.Lastly, the research zone develops three kinds interlayer and four kinds insulating layer. The distrbution of calcareous interbeds and physical interbeds are limited and the affection of the ditrbution of remaining oil is smaller.The distrbution of muddy interbeds is relative stabilization;the shielding effect is strong to oil-gas migration, water injection and polymer injection. The shielding effect of continuous distribution insulating layer and evenly distributed insulating layer are effective; the reservior is not easy to channeling. The shielding effect of local distribution and ribbon distributive are defective; the reservior is easy to channeling."Facies control modeling" method guide internal structure characteristic of reservoir and further development of oilfield in Gudao oilfield middle two section 28-8 well field.