Horizontal well,extended reach well,and sidetrack well have been widely drilled in recent years,logging in these kinds of wells with normal logging tools become difficult and impossible.

• 为了提高勘探开发的综合效益,近年来我国油田采用一些水平井、大斜度定向井、老井开窗大斜度定向侧钻井等,测井面临如何作业的新问题。