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All Journal Scientific Contributions Oil and Gas
Edgie Yuda Kaesti
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Energy

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

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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 can 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 improved thermal stability, reducing viscosity degradation from 32.83% to 4.24%. This formulation achieved an ideal Resistance Factor (11.44) and minimal formation damage (RRF 1.01), enhancing Recovery Factor from 67.38% to 87.29%. These findings confirm that the incorporation of oxygen scavengers effectively minimizes polymer degradation, establishing them as a crucial component for the successful implementation of EOR in moderate-salinity sandstone reservoirs.
Co-Authors Dhika Permana Jati Ilham Ardatul Putra Putri Diantha Hetharia Ratna Widyaningsih