关键词: 漏点检测, 环空带压, 深层气井, 测井, 不动管柱

Abstract: In order to accurately identify the leakage location of multi⁃annulus pressure wellbore in deep gas wells, field tests of leakage detection have been carried out for typical well X1 in X deep gas field in China by using array noise, spectrum noise, electromagnetic defect detection and temperature logging technology and through production tubing logging methods. The results show that there are leakage points in the A, B and C annulus of the well. The formation gas channeling through packers, casing threads and cement sheaths leads to continuous annulus pressure in the well. It can be seen that the combined logging technology can locate the deep gas well leakage point through the 3⁃layer pipe column, and comprehensive information can be used to accurately determine the path and cause of the gas leakage. The casing leakage was detected through the production tubing, so the leak detection results can not only provide an important basis for the treatment of the wells with sustained casing pressure, but also avoid tripping operation, without affecting gas well production, which has certain application prospects.

Key words: Leak detection, Annular pressure, Deep gas well, Logging, Fixed column