Study on the Cathodic Protection Scheme in Oil and Gas Transmission Station Based on Numerical Simulation

摘要

There are various protected objects distributed intensively in oil and gas transmission station, including all kinds of buried pipelines, tank bottoms, equipment bases and grounding. These would consume relatively large current and also cause many problems such as interference and shielding. Thus, it is very difficult to design anode ground beds in oil and gas transmission station. In this work numerical simulation is applied to determine the optimal cathodic protection scheme in oil and gas transmission station. A cathodic protection potential distribution model is established and the corresponding boundary conditions for both cathode and anode are also given. Based on this, several kinds of anode ground bed schemes for a practical oil and gas transmission station are evaluated numerically, in which the optimal location, buried depth and quantity of the anode ground bed are obtained. The present study is valuable in optimizing the cathodic protection scheme for oil and gas transmission station.