工程测井在钻井事故处理中的应用

Applications of Electric Logging in Downhole Accident Treatment

在处理钻井和完井作业过程中发生的井下事故时,工程测井能够给工程技术人员提供井下的信息,降低事故处理的难度,加快事故处理的速度,减少事故损失。介绍了5种工程测井方法的原理和使用范围,举例说明了各种测井方法的应用效果。分析表明:运用变流量测井和井温测井能够准确判断管柱漏失的位置;问题点不在管柱接箍及其附近时,36臂井径成像测井能够描绘出漏失点的形状;感应测井和电磁探伤测井对裸眼井段内鱼头位置的判断较准确,电磁探伤测井对裸眼井段内有两根管柱时第一、二鱼头位置的判断也都准确。

In the process of dealing with downhole accidents occurred during drilling and well completion operations, electric logging provides downhole information, make it easier to deal with accidents, speed up accident treatment, and reduce damages. This paper presents the principals and applicability of 5 logging methods. Analysis indicates that variable flow rate logging and temperature logging can verify loss position on pipes, the 36-arm wellbore size imaging logging can describe the shape of loss position, induced logging and electromagnetic logging can be used to judge position of fish head in open hole, and electro- magnetic flaw detection logging can be used to determine positions of the first and the second fish head in conditions of being two pipes in open hole.