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All Journal Dharma: Jurnal Pengabdian Masyarakat Scientific Contributions Oil and Gas
Ratna Widyaningsih
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Energy Social Sciences

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MEMFASILITASI MINAT BACA MASYARAKAT MELALUI PERPUSTAKAAN FISIK DAN DIGITAL DUSUN KARANGMOJO Yudhy Widya Kusumo; Ratna Widyaningsih; Ristiyan Ragil Putradianto; Dewi Nur K.; Intan Zuhaira
Dharma: Jurnal Pengabdian Masyarakat Vol 2, No 2 (2021): November
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1148.105 KB) | DOI: 10.31315/dlppm.v2i2.6216

Abstract

The current Covid-19 pandemic has caused children to study online. Thus, children are increasingly opening and playing gadgets. Not a few children spend their time just playing 'online games'. Adults who do activities or work from home on average spend their time using gadgets. With this phenomenon, people's interest in reading has decreased. One way to increase people's interest in reading is by making the Karangmojo Village Community Reading Corner. In the era of globalization as it is now, this Community Reading Corner not only provides a physical library but also provides a digital library that can be accessed via the Handy Library aplication by the people of Karangmojo Village.
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 Dewi Nur K. Dhika Permana Jati Edgie Yuda Kaesti Ilham Ardatul Putra Intan Zuhaira Putri Diantha Hetharia Ristiyan Ragil Putradianto Yudhy Widya Kusumo