雅克拉-大涝坝凝析气田投产5年时间内, 因腐蚀报废油管15500 m。通过对气井腐蚀环境、井下油管腐蚀状况和失效状况进行分析, 根据结论提出采用有利于腐蚀防护的先进完井工艺, 采用升级管材和特殊扣型的扣内涂层管, 探索改性金属油管的使用和采用阴极保护等腐蚀防护措施和建议。

Yakela-Dalaoba gas condensate field locates in Xinjiang Tarim Basin. The reservoir property belongs to high depth (5000-6000 m), high pressure (56-58 MPa), high temperature (146-150 ℃) and complex corrosion environment (high CO2, high Cl-, low pH , low H2S ). After the field was put into operation for 5 years, due to the occurrence of corrosion of underground pipes 15, 500 meters tubing were scrapped. After analyzing the Yakela-Dalaoba corrosive environment and the failure in hole tubing, the gas well downhole tubing corrosion protection measures and recommendations are proposed.