THEMEEtude de corrosion et protection des équipements de production du gaz brut à HASSI R’mel

Abstract

Corrosion production equipments of crude gas in HASSI R'Mel manifests inside for aerial installations and outside buried pipes, and all that is detected by the corrosion inspection techniques at HR field, in order to reduce the harmful consequences of this problem by the injection of corrosion inhibitor for aerial installations, or by the cathodic protection of buried pipelines. The study of corrosion inhibitors (CHIMEC 1038 and CHOMPION CK981DZ) for aerial installations shows that the efficiency of CHIMEC 1038 equals 85% with an optimized injection rate at 1.02 litre/million sm3, and the efficiency of CHOMPION CK981DZ is 99.17% with an injection rate optimized at 0.5 litre/million sm3. The results obtained after the dimensioning of the cathodic protection in HR field for a collector of producing wells of the crude gas with a length of 36557 m show that the anodic well must contain an anode mass of 300kg, which is alimented by a rectifier transformer (Ured=20.09V, Ired = 17.76A). The calculation of the intensity of the current from the power source I = 25A us assures a protection for the buried pipelines an estimated life of 20 years.