Publications

The 'AAN' well is one of the wells selected for CO₂ injection as part of a carbon capture and storage project. Well-testing was conducted to determine the properties and characteristics of the reservoir. This test involved a vertical interference test using the Fall-Off Test method. During the operation, three gauges, ‘BQP’, ‘DQP’, and ‘SP’, were used in series to measure time, rate, and pressure data, which were then used as an input into software for vertical interference analysis. The main outcome of the vertical interference test is the vertical permeability between layers, which is essential to demonstrate the sealing ability of the layer to act as a CO₂ storage barrier. After completing the vertical interference analysis, vertical permeability values were obtained between the ‘BQP’ and ‘DQP’ gauges, and between the ‘DQP’ and ‘SP’ gauges. The results show that the vertical permeability between ‘BQP’ and ‘DQP’ is 7 mD, while the vertical permeability between ‘DQP’ and ‘SP’ is 0.4 mD. The vertical permeability between ‘DQP’ and ‘SP’ (0.4 mD) will serves as the primary barrier, while the permeability between ‘BQP’ and ‘DQP’ (7 mD) will serve as the secondary barrier. In this CO₂ storage project, the primary barrier measured between ‘DQP’ and ‘SP’ acts as the main layer for CO₂ retention. The secondary barrier, represented by the vertical permeability between ‘BQP’ and ‘DQP’, serves as an additional layer to retain CO₂ if the primary barrier fails.