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All Journal Info-Teknik Justek : Jurnal Sains Dan Teknologi Majamecha International Journal of Hydrological and Environmental for Sustainability JURNAL TEKNIK GEOLOGI : Jurnal Ilmu Pengetahuan dan Teknologi PIKAT Petrogas : Journal of Energy and Technology Jurnal Geosaintek Jurnal Penelitian Teknik Scientific Contributions Oil and Gas
Ryka, Hamriani
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Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Mathematics Mechanical Engineering Other

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Depositional Facies Influence on Reservoir Heterogeneity in The Balikpapan Formation, Lower Kutai Basin: Insights Well Log Analysis Wahid, Abd.; Sultan; Meutia Farida; Jamaluddin; Ryka, Hamriani
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.v49i1.1985

Abstract

This The Balikpapan Formation in the Lower Kutai Basin hosts a complex assemblage of fluvial-to-deltaic reservoir facies whose heterogeneity significantly influences reservoir quality and connectivity. This study integrates well-log interpretation, electrofacies classification, and quantitative petrophysical evaluation from six wells to assess the stratigraphic controls governing reservoir distribution. Three main facies associations are identified: channelised sandstones, mouth-bar to delta-front, and prodelta. Proximal channel sands exhibit the highest porosity (18–30%) and permeability (5–40 mD), but their limited lateral continuity results in poor interwell connectivity. Mouth-bar and delta-front sands display moderate porosity (12–25%) and permeability (<1–30 mD) and form laterally extensive, sheet-like bodies that enhance reservoir connectivity under increasing tidal influence. Thick prodelta mudstones act as regionally extensive vertical seals. The stratigraphic framework is characterised by repeated upward- coarsening parasequences bounded by marine flooding surfaces, reflecting alternating phases of delta progradation and transgression. These results demonstrate that depositional processes and stratigraphic architecture are the primary controls on reservoir heterogeneity in the Lower Kutai Basin.
PENDEKATAN SISTEM INFORMASI GEOGRAFIS (SIG) DALAM PENENTUAN ZONA KERENTANAN TANAH: STUDI KASUS BERAMBAI, SEMPAJA UTARA, KOTA SAMARINDA Ayuningrum, Reta Andila; Ryka, Hamriani; Agusti Putri, Efrina Chandra; ., Jamaluddin
PETROGAS: Journal of Energy and Technology Vol 8, No 1 (2026): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v8i1.210

Abstract

This study aims to identify the geomorphological characteristics, drainage patterns, and landslide susceptibility levels in the Berambai area and its surroundings, North Samarinda District. The research method integrates analyses of morphometric data, lithology, and geological structures. The results indicate that the study area is a single structural origin landform, divided into three landform units: undulating/sloping (s1), hilly-undulating (s2), and sharply dissected hilly/steep (S3). genetically, this region is influenced by syncline structures and a right lag slip fault, which control the development of dendritic drainage patterns in the Northwest and East, and subdendritic patterns in the Central to Southern parts. Landslide susceptibility analysis reveals a dominance of the Moderate Susceptibility Zone (60.3%), covering residential areas, followed by the high susceptibility zone (31.3%) on steep slopes with open land, and the low susceptibility zone (8.4%) in densely vegetated flatlands. The correlation between steep slopes, geological structural control, and intensive land use is the primary factor driving the high risk of ground movement in the study location
Co-Authors Abd. Wahid Agusti Putri, Efrina Chandra Alfarisi R, Muhammad Mahdivikia Ayuningrum, Reta Andila Battu, Desianto Payung Candra Agusti, Efrina Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jamaluddin Manik, Nijusiho Meutia Farida Nur Aprilya, Putri Payung Battu, Desianto Prabowo, Iwan Prasetyawati Umar, Emi Pratikno, Fathony Akbar Prayoga, Vicky Sandy Hida Putri, Efrina Candra Agusti Putri, Efrina Chandra Agusti Qulub, Muhammad Syifaul Rohima Sera Afifah Sahara, Ain Saputra, Muhammad Reza Saputra, Riza Hadi Sulardi . sultan Suprastiwara, Khrisko Suprayitno, Abdi Waskita, Kukuh Jalu Widodo, Pria Agung Yuniarti Yuniarti