Multi-media environment corrosion mechanism and protection technology of gathering and transportation pipeline in oilfield
In view of the problems of frequent leakage and corrosion failure in a gathering and transporta-tion pipeline in Jiyuan Oilfield,water quality analysis,corrosion and scaling product analysis,surface mor-phology and element composition analysis were carried out.The corrosion mechanism under multi-media environment of CO2,H2S,dissolved oxygen,Cl-and scaling ions was studied,and the corrosion and scal-ing treatment methods were optimized.The results show that the main factors causing pipeline corrosion are CO2-H2S-Cl-co-existing corrosion and bacterial corrosion,which promote the development of local corrosion.By new corrosion inhibitor and coating combined anti-corrosion technology,the on-site corrosion rate is reduced to 0.011 8 mm/a,which can minimize or reduce the corrosion of gathering and transporta-tion pipelines,and extend its service life.
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维普
