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许多未取得勘探成果而被封堵处理的探井,井口简易闸门、井口帽易遭受被不法分子盗窃和破坏,导致被封堵的油、气、水渗出并流出井口,极易造成环境污染事故,甚至造成油气聚集而引发安全事故,给油田造成重大的经济损失和恶劣的社会影响。因此,有必要对该类型废弃井进行重新封堵。近几年,青海油田涩北作业公司处置废弃井多达几十口,井内均发现非法堵塞物和充填物等,每口井的情况大体相似。在进行封堵之前,须将堵塞物清理干净,这是封堵工作的
Many exploratory wells, wellhead simple gates and wellhead caps that have been blocked without exploration achievements are vulnerable to theft and destruction by lawless elements, resulting in the seepage of oil, gas and water that have been blocked out of the wellheads and can easily lead to environmental pollution accidents , And even caused oil and gas accumulation and caused a safety accident, causing significant economic losses and adverse social impacts to the oilfield. Therefore, it is necessary to reseal this type of abandoned well. In recent years, as many as dozens of abandoned wells have been disposed by the Sebei operating company in Qinghai Oilfield, illegally plugged materials and filling materials have been found in the wells. The conditions in each well are generally similar. Before blocking, the blockage should be cleaned up, which is blocking work