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储气井是一种特殊的地下管状立式承压设备。井筒采用螺纹连接,工作压力高达25MPa,介质为压缩天然气。据不完全统计,目前全国在用储气井达到7000口以上。早期的储气井因为缺乏规范和疏于管理,并且未进行过检验,出现了不少问题也发生了严重事故。2005年四川宜宾1口储气井整体窜出地面,造成了非常大的经济损失。2008年11月国家质检总局发出《关于加强地下储气井安全监察工作的通知》,要求中国特检院进行储气井的定期检验工作。储气井定期检验工作开展3年以来,发现了不少问题,其中一个突出问题就是储气井井筒的腐蚀问题。1储气井的腐蚀当储气井未进行固井或固井质量较差时,储气井
Gas storage wells are a kind of special underground tubular vertical pressure equipment. Wellbore using threaded connections, working pressure up to 25MPa, the media for compressed natural gas. According to incomplete statistics, at present, the country has reached more than 7,000 ports with gas storage wells. Because of the lack of normative and neglect management of early gas storage wells and the untested tests, many problems and serious accidents have occurred. In 2005, a gas well in Yibin, Sichuan Province sprang up from the ground as a whole, causing a very large economic loss. In November 2008, AQSIQ issued the Circular on Strengthening the Safety Supervision of Underground Gas Storage Wells, requiring China’s Special Inspection Agency to carry out regular inspection of gas storage wells. During the three years since the regular testing of gas storage wells, many problems have been discovered. One of the outstanding problems is the corrosion of gas storage wellbores. 1 gas well corrosion When the gas well is not well cementing or cementing poor quality, gas wells