通过建立海底管道全寿命周期成本模型使海底管道运营者以最低的成本选择出最优的海底管道运行维护方法。针对模型中与海管维护相关的九大类经济成本因素进行评价，根据发生费用条件的不同，对相关经济成本进行费用排序。通过具体的海底管道维修的案例分析，将实际案例成本植入模型要素中，模型给出的最优化的运维方法与案例中方法一致。

A subsea pipeline life cycle cost model is established, so that the pipeline operator can choose the best way to operate the pipe with the least cost. There are nine categories of cost factors in this model. The cost can be ranked from high to low according to the difference of cost conditions. From case analysis of subsea pipeline maintenance, the optimized measures chosen from the model fit the real cases.