Study On Calculation Method Of Hydraulic And Thermodynamic Interpolation For Mixed Transportation Pipeline Based On Database

Oil and gas pipelines hydraulic and thermal calculation is the oil field gathering and transportation network design and operation of the development of an important part of the program.The calculation results of oil-gas-water three-phase mixing pipeline are calculated by using the existing hydraulic and thermodynamic calculation method.The calculation result is often deviated from the actual operation result,which leads directly to the increase of pipeline investment and running cost.Taking into account the pipeline data that has been built and put into operation can draw lessons from this paper,the paper puts forward the idea of using the interpolation method of pipeline to design and calculate the hydraulic power of pipeline.First,the database entry standard is put forward.According to the database collection standard,the input and output of the loop and the oil flow,air flow,water flow,pressure and temperature of the test points are provided,which provide the basic data for the interpolation algorithm.Secondly,The theoretical analysis of the method,in the hydraulic calculation,the friction pressure drop more factors and the relationship is more complex,but also by the flow of the larger impact,so the existing commercial software calculation error is relatively large,so try The interpolation of the friction pressure is calculated.According to the result of the sensitivity analysis,the data samples for interpolation are selected,and finally the corresponding pipelines are selected in the order of pipe diameter,throughput and pipe length.On this basis,it is further preferred that the pipeline is more suitable for interpolation calculation data.In the thermodynamic calculation,the total heat transfer coefficient K is the key to the temperature drop calculation,and the K value has many influencing factors,so try to interpolate the K value.According to the results of the sensitivity analysis,it is determined that the pipeline has been built in the order of diameter,moisture content and flow.On this basis,the pipeline data more suitable for interpolation calculation is further selected as the sample of temperature drop interpolation.Based on the calculation algorithm of hydrodynamic interpolation,the corresponding interpolation calculation software is compiled,and the field data of Hailaer-Zhongzhong Petrol Station to Deyi Pipeline,Yingma force and Dina are taken as the basic data The results show that the computational error of interpolation prediction method is 30% higher than that of PIPEPHASE and OLGA,and the accuracy of PIPEPHASE software and OLGA software is 30% higher than that of PIPEPHASE and OLGA.the above.