长输天然气气质对管道内腐蚀的影响研究

摘要

The properties of Dongfang-Yangpu-Haikou and Dongfang-Sanya pipeline natural gas were analyzed,the content of CO 2 was 4.94%(mol)and 8.21%(mol)respectively,which was more than 3%(mol)required in standard (Q/SY 30—2002). The content of H 2 S was 25.2 mg/m3 in the Dongfang-Sanya pipeline natural gas,which was also more than standard of 20 mg/m3 .So,the chemical corrosion of Dongfang-Sanya pipeline was serious.By the test of sulfate reducing bacteria cultivating, sulfate reducing bacteria corrosion was proved in Dongfang-Yangpu-Haikou pipeline,although it was very slight.%对东方-洋浦-海口和东方-三亚管输天然气气质进行分析,结果表明,CO 2气体摩尔分数分别为4.94%和8.21%,大于中国石油企业标准(Q/SY 30—2002)要求的3%。东方-洋浦-海口天然气的 H 2 S 含量较低,东方-三亚 H 2 S 的质量浓度为25.2 mg/m3,高于标准要求的20 mg/m3。因此,东方-三亚输气管道 H 2 S 和 CO 2化学腐蚀较重。通过硫酸盐还原菌培养实验证明东方-洋浦-海口管线存在硫酸盐还原菌腐蚀,但腐蚀较轻。