Risk-Based Optimization Method for Maintenance Decision of Oil Field Water Injection Pipeline

Based on the risk assessment results of water injection pipeline, corresponding solutions were given for the bottom event of T-S fuzzy fault tree. Combined with decision criteria, subsets, decision trees, etc., the decision-making cost and failure consequences of water injection pipelines were quantified, and a decision-making optimization mathematical model of "prioritizing risk control, and then comparing economics" was established. The risk level of each decision was calculated, the decision tree was drawn, the loss expectation value of each decision with an acceptable risk was calculated and compared, and the optimal decision plan was determined. This method was used to optimize the maintenance decision of a water injection pipeline, and achieved a fairly better maintenance effect.