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All Journal Scientific Contributions Oil and Gas
Yudha Taufantri, Yudha
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Chemical Engineering, Chemistry & Bioengineering Energy

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Polymer-Oxygen Scavenger for Oil Recovery in Sandstone Jati, Dhika Permana; Hetharia, Putri Diantha; Damayandri, Dadan; Widyaningsih, Ratna; Kaesti, Edgie Yuda; Taufantri, Yudha; Putra, Ilham Ardatul
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1854

Abstract

Polymer degradation caused by dissolved oxygen remains a major challenge in Enhanced Oil Recovery (EOR) for sandstone reservoirs, especially under moderate salinity (18,000 ppm) and temperature (60°C) conditions, which accelerate viscosity loss. While HPAM polymers are highly effective, ensuring their long-term stability requires strategies that preserve molecular integrity throughout the injection process. This study employs laboratory experiments to assess two HPAM variants (FP 3630 and FP 3230), both in conventional formulations and with an oxygen scavenger (NaHSO₃), using Bentheimer synthetic cores. Evaluations cover fluid-to-fluid (compatibility, rheology, filtration, thermal stability) and fluid-to-rock (injectivity, core flooding) performance under reservoir conditions. Results identify FP 3630 at 1400 ppm with 0.1% NaHSO₃ as the optimal formulation. The oxygen scavenger significantly improves thermal stability and reduces viscosity degradation from 32.83% to 4.24%. This formulation achieves an ideal Resistance Factor (11.44) and causes minimal formation damage (RRF 1.01), while enhancing the Recovery Factor from 67.38% to 87.29%. These findings confirm that the incorporation of oxygen scavengers effectively minimizes polymer degradation and establishes them as a crucial component for the successful implementation of EOR in moderate-salinity sandstone reservoirs.
Co-Authors Damayandri, Dadan Edgie Yuda Kaesti Hetharia, Putri Diantha Jati, Dhika Permana Putra, Ilham Ardatul Widyaningsih, Ratna