磁记忆检测技术在射孔套管安全评价中的应用  

Application of the Magnetic Memory Testing Technology in Perforation Casing Safety Assessment

作　　者：齐立娟[1] 樊建春[1] 张来斌[1] 温东[1] 孙秉才[1] 张广伟[1] 

机构地区：[1]中国石油大学(北京)机械与储运工程学院

出　　处：《石油机械》2012年第8期52-55,共4页China Petroleum Machinery

基　　金：国家科技支撑计划"三高气田井口安全设备配套与安全评价技术"(2008BAB37B04)

摘　　要：在分析套管损坏机理的基础上,采用合理的检测手段对油层套管的损坏情况进行检测,对油田企业采取有效的预防措施,延长套管使用寿命具有重要意义。对磁记忆信号和套管炮眼形状的定量关系进行了探索,并将磁记忆检测方法用于井下套管的检测中,提出了基于磁记忆检测技术的套管安全评价流程,得到了不同孔径炮眼与磁记忆检测信号的对应关系。运用米泽斯屈服条件对射孔段套管的强度进行了分析评价,在模拟套管内部全掏空的情况下,测试段套管最大等效应力值小于其屈服强度,依然满足生产要求,但由于孔边存在应力集中现象,套管的安全状态受到了很大影响。On the basis of analyzing the damage mechanism of casing, adoption of reasonable detection means to detect the damage of casing is significant to oilfield enterprises＇ taking effective preventive measures to lengthen the service life of casing. The quantitative relation of magnetic memory signal and casing perforation shape was explored and the magnetic memory detection method was used to detect downhole casing. The casing safety assessment procedure was formulated on the basis of magnetic memory detection technology, and the corresponding relation between perforations of different diameters and magnetic memory detection signals was obtained. The Von Mises yield condition was adopted to analyze and assess the casing strength of the perforation section. In hollowing the inside of the simulation casing, the maximum equivalent stress value of the casing of the testing section is less than its yield strength, satisfying the production requirement. But due to the hole-edge stress concentration, the casing safety is affected remarkably.

关 键 词：射孔套管 磁记忆检测 套管炮眼 安全评价 信号梯度 半峰宽 

分 类 号：TG115.28[金属学及工艺—物理冶金]