| 川渝页岩气集气管线失效原因分析 |
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| 引用本文： | 文崭,杨建英,王彦然,康林,青松铸.川渝页岩气集气管线失效原因分析[J].石油与天然气化工,2021,50(4):109-113. |
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| 作者姓名： | 文崭 杨建英 王彦然 康林 青松铸 |
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| 作者单位： | 四川长宁天然气开发有限责任公司;中国石油西南油气田公司天然气研究院 ;国家能源高含硫气藏开采研发中心;中国石油集团公司高含硫气藏开采先导试验基地;中国石油西南油气田公司蜀南气矿长宁页岩气作业区 |
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| 摘 要： | 川渝某页岩气平台集气管线投产后短时间内发生穿孔失效,为找出集气管线腐蚀失效的原因,分析了失效管段所处的腐蚀环境,结合材料理化性能和腐蚀产物形貌成分测试结果,认为输送介质中的CO2和返排液中高含量的硫酸盐还原菌(SRB)是造成管道腐蚀穿孔的重要原因,两者同时参与了腐蚀反应,形成主要由代表性腐蚀产物FeCO3、FeS构成的产物层。在CO2和SRB代谢的共同作用下,集气管线快速腐蚀穿孔。
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| 关 键 词： | 集气管线 失效分析 蚀孔 产物成分 |
| 收稿时间： | 2021/1/8 0:00:00 |
Analysis of failure reason of gas-gathering pipeline in Sichuan-Chongqing shale gas field |
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| Wen Zhan,Yang Jianying,Wang Yanran,Kang Lin,Qing Songzhu.Analysis of failure reason of gas-gathering pipeline in Sichuan-Chongqing shale gas field[J].Chemical Engineering of Oil and Gas,2021,50(4):109-113. |
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| Authors: | Wen Zhan Yang Jianying Wang Yanran Kang Lin Qing Songzhu |
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| Affiliation: | Sichuan Changning Natural Gas Development Co., Ltd, Chengdu, Sichuan, China;Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;National Energy High-Sour Gas Reservoir Exploitation and R & D Center, CNPC, Chengdu, Sichuan, China;High Sulfur Gas Exploitation Pilot Test Center, CNPC, Chengdu, Sichuan, China;Changning Shale Gas Operation Area, Southern Sichuan Gas District, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China |
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| Abstract: | The perforation of a gas-gathering pipeline occurred in short time of a certain platform in Sichuan-Chongqing shale gas field. For finding the reasons of gas pipeline corrosion failure, the corrosive condition was analyzed at first. Then, combined with the physical and chemical properties of materials and the test results of the morphology and composition of corrosion products, the conclusions were gotten. CO2 in feed gas and sulfate-reducing bacteria(SRB) in flow back fluid were both main factors for the corrosion failure of gas-gathering pipeline,which participated in corrosion reaction and the corrosion scale mainly composed of FeCO3 and FeS was formed. With the effect of CO2 and SRB metabolism, pitting of gas-gathering pipeline developed rapidly. |
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| Keywords: | gas-gathering pipeline failure analysis pitting composition of corrosion product |
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