Gas lift systems: Design and optimization of Well ONM112

Abstract

In mature oil fields like Hassi Messaoud, declining reservoir pressures necessitate artificial lift methods to maintain economic production, with gas lift being predominant. Gas lift reduces bottom hole flowing pressure by decreasing fluid hydrostatic pressure and mitigating rapid reservoir pressure drops. However, the limitations of available gas and compressor capacity necessitate optimization for maximum recovery. This study focuses on optimizing gas lift for well ONM112, which suffers from a production decline due to formation pressure dropping to 200 bar and a low gas-to-liquid ratio (GLR). The research methodology involves comprehensive data collection, including well completion details, well testing data, and PVT analysis. Nodal analysis principles are then applied to optimize operational procedures by adjusting outflow expressions. This theoretical framework helps select optimal performance parameters to maximize production efficiency. Using PIPESIM software,. The results show a significant improvement, achieving an optimum gas injection rate of 20000 Sm3/d and an increase in oil production rate by 5.87 m3/h for ONM112 well. Additionally, this study proposes changes in tubing diameter, choke settings, and gas lift injection rate