Abstract: Reasons for logging failures in horizontal wells in the Tahe Oil Field during year 2014-2015 were discussed. There are three main problems:wet joint docking, instrument failure, and instrument blocked. Some common influencing factors in construction were listed. A set of effective construction technique and solution was proposed, including hole and construction preparation before logging, technical improvement of horizontal well logging, and avoiding accidents caused by error operation. Some corresponding solving measures were put forward in view of high temperature and high pressure in Shunnan area, and achieved good application effects.