#TITLE_ALTERNATIVE#

• Main Author: VALDY IRAWAN ARIMBAWA (NIM: 12209059), GDE
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22244
• Institution: Institut Teknologi Bandung

Corrosion in production tubing strings has been considered as a challenging problem in gas wells containing carbon dioxide as well as hydrogen sulfide. An imprecise prediction of corrosion attack would first result in thinning of tubing thickness, tubing leakage, moreover in an extreme condition, the tubing strings would experience severe failure which requires a workover to replace it. Consequently, the well should be intervented, resulting in loss of revenue due to the cost expenditure for workover operation. These disadvantages are able to be avoided by predicting and calculating the corrosion rate and selecting the appropriate tubing material. <br /> <br /> The customary chemical components which cause the corrosion are either carbon dioxide, hydrogen sulfide, oxygen, or a combination of those chemicals contained in the gas. However, the composition of reservoir fluids are not the only factors affecting corrosion rate. This paper presents a new comprehensive methodology of the corrosion rate calculation with integrated study by considerating reservoir condition, Nodal Analysis of the well, and well trajectory which would also have an effect due to the possibility of different flow regime of the production fluid along string. Based on this study, it is expected to select tubing material comprehensively. <br /> <br /> The technical benefits of this new methodology are the ability to predict maximum corrosion rate in the donwhole completion and selecting tubing with additional material to avoid corrosion attack, such as chromium, molybdenum, and nickel for certain condition of each gas wells. This method had been implemented in XX Gas Field and successfully selected the best tubing material for the next development wells in XX Field. This way, the life-time of tubing strings could be extended as well as economically beneficial.