金属磁记忆技术在胜利油田废弃井探测中的应用
2018-11-21王凯李开源刘丽黄晓亮李薛
王凯 李开源 刘丽 黄晓亮 李薛
摘 要:油井无法获得工业油气流后,将计划关井或转为废弃井,随着油田开发时间增长,废弃井数量也在逐年增长,部分未妥善封井的废弃井已深埋于人口密集区、住宅区、厂房等区域,一旦发生油气泄漏,势必造成重大安全环保事故。文章主要介绍金属磁记忆技术在胜利油田废弃井探测定位中的应用,通过磁异常信号分析进行废弃井探测,这种方法具有快捷、精确的特点,在实际应用中取得了较好的应用效果,为胜利油田废弃井检测提供了一种有力的技术保障。
关键词:金属磁记忆;废弃井;探测;定位;应用
中图分类号:TG115.28 文献标志码:A 文章编号:2095-2945(2018)28-0158-02
Abstract: After the wells are unable to obtain industrial oil and gas flow, the planned wells will be shut down or turned into abandoned wells, and the number of abandoned wells will increase year by year as the oilfield development time increases. Some abandoned wells which have not been properly sealed have been deeply buried in densely populated areas, residential areas, factory buildings and other areas. Once oil and gas leakage occurs, it is bound to cause serious accidents of safety and environmental protection. This paper mainly introduces the application of metal magnetic memory technology in the detection and location of abandoned wells in Shengli Oilfield. This method has the characteristics of rapidness and accuracy. In the practical application, a good application effect has been obtained, which provides a powerful technical support for the abandoned well detection in Shengli Oilfield.
Keywords: metal magnetic memory; abandoned well; detection; location; application
随着油田开发时间增长,大量油井进入开发末期后,无法获取工业效益,逐步关停,废弃油水井的数量在逐年增长,现存废弃井总量巨大。根据统计,胜利油田目前有各类尚未永久封堵的油水气等废弃井共7000余口。其中有2000余口廢弃井由于城市改扩建或基础资料不完善等原因,目前无法确定井口位置。部分废弃井甚至位于工厂或居民小区之中,一旦发生油气泄漏,极有可能引发严重的安全环保事故,因此急需一种有效的探测手段进行废弃井的不开挖检测定位。
1 金属磁记忆技术简介
1.1 磁记忆检测原理
上世纪90年代,俄罗斯的杜波夫首次提出了金属磁记忆的概念。铁磁性材料具有特殊的磁畴结构,这些磁畴结构是随机排列的,具有自发磁化的特性。当铁磁材料受到外界弱磁场(地磁场)或外界应力作用时,内部的磁畴性物质为了抵抗外力作用,自发地按照一定的序列排序,形成一定的磁场抵抗外力。……
