A Review of the Effectiveness of Corrosion Inhibitor Injection in Gas Field Gathering Pipelines

Abstract

In the rapid development of gas fields, with the gradual increase in produced water and the extended service life of gathering and transportation pipelines, corrosion issues have become increasingly prominent. Especially the frequency of punctures and perforations is increasing year by year. In response to the serious problem of internal corrosion, the main methods for prevention and control at home and abroad are "regular pigging, pre-filming with corrosion inhibitors, and spraying". However, a reasonable system for adding corrosion inhibitors to gathering and transportation pipelines has not yet been established, and most of the related technological processes rely on engineering experience. The technical system lacks corresponding theoretical guidance and evaluation standards, resulting in technical difficulties such as poor adaptability, high dosage consumption and difficulty in controlling the quality of the protective film in the injection of corrosion inhibitors. Therefore, there is an urgent need to optimize the injection schemes of corrosion inhibitors, gradually improve the corrosion inhibitor injection technology system, develop injection schemes and technical procedures suitable for field conditions, and reduce the degree of internal corrosion and the frequency of punctures and perforations in gas field gathering and transportation pipelines. This will enhance the quality and efficiency of corrosion inhibitor application and management. In this paper, the injection process of corrosion inhibitors, the evaluation technology of corrosion inhibition efficiency, existing problems in the effectiveness of on-site injection of corrosion inhibitors and future development trends were summarized to provide references for the technology of corrosion inhibitor injection in gas field gathering pipelines.

Keywords

• gathering and transportation pipeline; corrosion inhibitor; corrosion monitoring; validity