Research on Predicting the Remaining Life of Gas Storage Pipe Strings Based on Grey Theory
Gas storage plays an irreplaceable role in the transportation and storage of natural gas.Aim-ing at the problems of numerous corrosion variables,complex relationships,and difficulty in obtaining data samples,a method for predicting the remaining service life of gas storage strings based on grey the-ory is proposed.First,combined with the grey theory,a GM(1,1)(Grey Model)model that can dy-namically update modeling data is designed.Secondly,based on the sample data set of the residual wall thickness of pipe strings in C5 well in an underground gas storage of CNPC,a quantitative corrosion residual life prediction model of pipe strings in gas storage is established.The average relative error of the prediction model is calculated,and compared with the monitoring data and the least square prediction method.The results show that the average relative error of the prediction method based on grey theory is 0.27%,the model prediction reaches first-level accuracy,which can be used as a new way to pre-dict the safety of gas storage pipe strings.Finally,the software interface design is carried out using Mat-lab,and the remaining life prediction software of the gas storage strings is developed,which realizes the quantitative prediction of the remaining life of the pipe strings more intuitively and quickly,and maxi-mizes the life of the pipe strings and even the entire gas storage.
gas storage pipe stringscorrosionremaining life predictiongrey theory
NETL
NSTL
万方数据
