苏里格气田甲醇污水预处理中的防腐阻垢技术研究  

Study on Anti-corrosion and Anti-scaling Technology of Methanol Sewage Pretreatment System in Sulige Gas Field

作　　者：李世勇[1,2] 张彩霞[3] 张文超 张新发[1,2] 吴保玉[1,2] 徐军[1,2] 陈怀兵[1,2] 

机构地区：[1]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [2]川庆钻探工程有限公司钻采工程技术研究院,陕西西安710018 [3]兰州城市学院,甘肃兰州730070 [4]西安长庆科技工程有限责任公司,陕西西安710018

出　　处：《全面腐蚀控制》2013年第10期75-79,共5页Total Corrosion Control

摘　　要：针对苏里格气田某天然气处理厂的高浓度甲醇污水腐蚀现状,室内开发出,油田用除氧剂等。通过现场考察、室内试验及理论分析,对目前处理工艺流程增加除氧剂加药口,并将阻垢剂加药口从过滤器后换至反应沉降罐前,试验结果表明:该技术稳定性好,油田除氧剂现场加药量为0.1%,阻垢剂加药浓度为130mg/L,加药25天后过滤器出口腐蚀速率低至0.038mm/a,在75℃未出现结垢现象,解决了甲醇回收再利用设备的腐蚀和结垢问题,对整个系统起到很好的保护作用。Aiming at the high concentrations of methanol sewage corrosion Present Situation for a natural gas processing plant in the Sulige gas field, oilfield oxygen scavenger is developed indoor. Through site visits, laboratory experiments and theoretical analysis, the treatment process increases the oxygen scavenger dosing port, and scale inhibitor dosing mouth to feed from the filter after the previous the reaction settling tank. The test results show that good stability of the technique, oilfield deoxidant site dosage is 0.1%, the antiscalant dosing concentration is 130mg/L, the corrosion rate of the dosing outlet of the filter lowers to 0.038mm/a after 25 days, the scaling phenomenon does not appear in the 75°C. Methanol recycling equipment corrosion and scaling problems are resolved, which gives a good protection to the entire system.

关 键 词：苏里格气田 甲污水预处理 腐蚀速率 除氧剂 阻垢剂 

分 类 号：TG174[金属学及工艺—金属表面处理]