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Fitri, Syahri Fani
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Earth & Planetary Sciences Energy Engineering

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The Effect of Salinity on the Effectiveness of CO2 Injection in the CO2 Storage Project in Bunter Field Fitri, Syahri Fani
Journal of Petroleum and Geothermal Technology Vol. 6 No. 1 (2025): May
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jpgt.v6i1.13754

Abstract

The increase in CO₂ concentration in the atmosphere has contributed to global warming. Reducing CO₂ emissions can be achieved through Carbon Capture Storage (CCS) projects, optimized by selecting appropriate formation water salinity for CO₂ injection. High salinity can impede CO₂ movement and cause mineral deposits, potentially clogging rock pores and reducing CO₂ solubility. This paper aims to analyze the impact of salt concentration in brine on CO₂ solubility and storage capacity in saline aquifers. In this study, a sensitivity simulation was conducted on an existing saline aquifer dataset to analyze the effects of varying formation water salinity using a CO₂ sequestration method with a reservoir simulator. Simulation results showed that different salinity levels in formation water yield varying CO₂ solubility rates; for instance, in a formation with water salinity of 1000 ppm, CO₂ solubility increased with a storage capacity of 910.283 MMscf, whereas at 100.000 ppm salinity, CO₂ solubility decreased, and the CO₂ storage capacity was slightly lower at 652.440 MMscf. Formations with lower salinity are considered more ideal for CCS projects as they can maintain higher CO₂ storage capacity and long-term stability. This study is expected to provide additional insights into enhancing the CO₂ solubility mechanism in saline aquifers.
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