Risk assessment method of oilfield gathering pipelines based on membership of information entropy

In order to effectively guarantee the safe operation of oilfield gathering pipelines, reduce the failure probability and avoid the major safety accidents, a safety risk assessment method was proposed on the base of the membership of information entropy. With this method, the particularity of the failure of gathering pipelines was defined by analyzing the failure data, and a calculation model for the risk assessment factor weights of gathering pipelines was established with the information entropy membership method. Moreover, based on the failure particularity and the weight calculation model, a relatively perfect risk assessment index system of gathering pipelines was developed. Additionally, a risk calculation model for gathering pipelines was established with Kent method, realizing the quantitative risk analysis of gathering pipelines. With the gathering pipelines in Xinjiang Oilfield as the object of study, a safety risk analysis was performed with the gathering pipeline safety risk assessment method based on the membership of information entropy. The analysis results show that the proposed method can more accurately assess the risk of gathering pipelines, and the assessment results are consistent with the actual conditions of gathering pipelines in Xinjiang Oilfield. Meanwhile, it can be a reference for the formation of risk assessment standards of gathering pipelines.