Corrosion Factors and Countermeasures of Gas Wells with CO₂

Considering the characteristics and technical requirements of the gas field development in anti-corrosion,according to corrosion test results of environmental parameters,using dynamic high-temperature autoclave,under the conditions of different temperature,flow,pressure,pH value,the weigh loss tests were carried out for applied materials.Through simulating the CO2 conditions,oil rings,air corrosion inhibitor and gas well corrosion inhibitors of ground and underground were screened.Corrosion coumtrer measures for gas test,completion,trial-produce and ground transportation systems were formed.Corrosion monitoring technology and information database management system was perfected and applied onsite successfully.