Yakela-Dalaoba Gas Well Downhole Tubing Corrosion and Protection Measures

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.