The Study On Thin Layer Identification And Reservoir Detailed Evaluation Of Nanbaxian Oil-gas Field

Multi-well reservoir well logging detailed evaluation is a critical part of oil-gas reservoir research.There are longitudinal thin layer development in the Nanbaxian oil-gas field,and various types of oil and gas reservoirs,oil and gas,gas and water are difficult to identify of the characteristics.How to evaluate the target reservoir effectively by using log data is of great significance to exploration and development.For the above reservoir characteristics,first,on the basis of the previous research,deepening the study of "four properties relations" according to different intervals.Secondly,using the core calibration logging technology to establish the reservoir parameter interpretation model and the effect of the model test is good.Thirdly,for the influence of the surrounding rock,the mud and other effects,the geologic information is not obvious on the logging curve,and the low resolution of the curve with low longitudinal resolution is adopted by the deconvolution method and the frequency matching method.Finally,four methods of qualitative identification of fluid are adopted for the difficult problem of fluid identification.They are compensated neutron-density envelope method,compensated neutron muddy correction method,depth resistivity ratio method,water line method.The quantitative identification use calculation method of gas-oil ratio,recognition is good.According to well testing and early production test to establish four sets of fluid identification and lower limit plate version.The qualitative and quantitative criteria of each layer were redefined.The classification adds a thin layer of the standard,and the recognition accuracy of the thin layer was improved.