There are various protected objects distributed intensively in an oil and gas transmission station, including buried pipelines, tank bottoms, equipment bases and grounding systems. These consume relatively large currents 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 stations.
Numerical simulation is applied to determine the optimal cathodic protection scheme in the 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
Several kinds of anode ground bed schemes for an oil and gas transmission station were evaluated numerically, in which the optimal location, buried depth and quantity of anode ground bed were obtained. The study was valuable in optimizing the cathodic protection scheme.
Extracts presented from the paper “ Study on the Cathodic Protection Scheme in Oil and Gas Transmission Station Based on Numerical Simulation” Yanxia Du, Minxu Lu, Liang Dong Corrosion and Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing. Shoubin Shao Sixth Oil Production Plant, Daqing Oilfield Co., Ltd.. Presented at NACE Corrosion 2011, Houston