环空带压井漏点检测技术在深层气田的应用

为了精确识别深层气井多环空带压的井筒泄漏位置，综合采用阵列式噪声、频谱式噪声、电磁探伤及温度测井技术，利用过生产油管的测井方式，对国内X深层气田环空带压典型X1井，开展了漏点检测现场试验。结果表明，该井A、B、C环空均存在泄漏点，地层气通过封隔器、套管螺纹及水泥环上窜导致该井持续环空带压。可见，采用组合测井技术能够通过3层管柱定位深层气井泄漏点，综合多方信息，可精准确定气体泄漏的路径及原因。通过过油管方式检测套管泄漏结果不仅能为环空带压气井治理提供重要依据，同时避免动管柱作业，不影响气井生产，具有一定推广应用前景。

Application of Leak Detection Technology for Sustained Casing Pressure Well in Deep Gas Field

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.