The Research On Reservoir Parameter Evaluation Of Horizontal Well Logging In An Oilfield

The remarkable effects of horizontal well technology on the development of oil fields result from the reduction of the costs of exploration and development,and the evident improvement of producility or recovery ratio of oilgas in single well,et al.Compared with the traditional straight wells,the horizontal wells can penetrate the natural cracks in a large area,increase the drainage area,increase the radius of the single well to control the oil,and so on.In this paper,the anisotropy of horizontal well logging response and related explanatory parameters in AN oilfield is studied,the straight well data of horizontal wells are analyzed,and the straight well interpretation model and identification plate are established.According to the results of anisotropy and the results of straight well interpretation,i have the horizontal well interpretation model,identification plate and reservoir lower limit,and further comprehensive analysis of reservoir lithology,physical properties and oil and other characteristics,to complete the horizontal well reservoir evaluation,with reference to identify the plate and the lower limit of the reservoir to determine the oiliness.The discovery of oil saturation change to the direction of the Wylie formula and Archie formula combination,the dry layer and oil saturation to small direction.Therefore,can distinguish between oil layer and dry layer using oil saturation parameter.In addition only Rt and GR is established under the condition of horizontal well porosity,saturation and permeability interpretation model for the first time in China to complete the logging series under the condition of porosity,permeability and saturation calculation parameters.From the point of view of the principle of logging method,stratum model formation model of horizontal well has been completely different from the straight wells,which is contributed to the formation elements logging response different rock changed.The characteristics of various log responses,especially the resistivity curves,need to be studied in depth.