Selection of Materials for D610 Natural Gas Gathering and Transportation Pipeline Con-taining Hydrogen Sulfide
The Daqing Transfer Blocks in the Sichuan Basin are mainly distributed in central and northeastern Sichuan,as well as the Xichang Basin,with abundant underground natural gas reserves.Based on this background,the pilot test project of the Heshen4 Block development is carried out in Daqing Oilfield.After preliminary trial production and exploitation analysis,the content of hydrogen sulfide in this project is 1.5%.How to choose pipeline materials for transporting natural gas containing hydrogen sulfide is the key to ensuring the safe and stable operation of the project.Currently,natural gas gathering and transportation pipelines containing hydrogen sulfide in China are mainly focused on pipe diameters of D508 and below.The pipe diameter of D610 used in the Heshen4 project has not been applied in previous projects.Through summarizing the selection standards and specifications for H2S-containing natural gas transportation pipeline materials at home and abroad,analyzing the corro-sion mechanism of hydrogen sulfide,and conducting in-depth research with well-known domestic manufacturers and pipe research institutes,the material selection for the D610 diameter natural gas gath-ering and transportation pipeline containing hydrogen sulfide in this project is sulfur-resistant longitudi-nally submerged arc welded steel pipe,to ensure the safe and stable operation of the pipeline and pro-vide reference for similar domestic projects.
D610 pipe diameterhydrogen sulfidegathering and transportation pipelinecorrosion
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