The Application of Current Requirement Test in Large Oil Field Station

Up till now, the local cathodic protection renewal of oil & gas field station can be only designed based on previous experience. Therefore, it may lead to some facilities out of protection and inhomogeneous distribution of potential. What is worse is that it can cause mutual interference with surrounding systems, resulting in the malfunction of the cathodic protection system. Through the current requirement test, the current density for the effective protection of storage tanks and pipelines can be obtained. Besides, the type and distribution of the anode ground bed can also be optimized. Thanks to the above calculation and optimization, the protection efficiency of the cathodic protection system can be significantly improved. In this paper, on-site current requirement test was conducted in a large oil field station. The simulation of the cathodic protection system was conducted in certain area separately so as to confirm the minimum current density value required for the effective cathodic protection and the potential distribution in certain area, all of which would benefit the redesign and renewal of the local cathodic protection system in the reservoir area.