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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Scientific Contributions Oil and Gas
Purba, Humbang
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Physics-Guided Multi-Attribute Petrophysical Inversion for Quantifiying Acoustic Impedance and Porosity in the F3 Reservoir Rahman, Fadhlur; Haris, Abdul; Ralanarko, Dwandari; Purba, Humbang; Rulandoko, Wrahaspati; Riyadi, Praditio; Nafian, Muhammad
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v7i2.47186

Abstract

This study introduces a physics-guided multi-attribute inversion (PG-MAI) approach to estimate acoustic impedance and porosity from post-stack seismic data using Bayesian Ridge Regression. The method integrates ten seismic attributes—including amplitude, frequency, and geometric features—into a regularized linear regression framework with Bayesian formulation. Applied to the F3 Block in the Dutch North Sea, the workflow includes temporal upsampling, attribute extraction, and model calibration using two well logs. The inversion results demonstrate high spatial coherence and alignment with geological structures. Validation at both wells shows strong agreement between predicted and measured log values, with correlation coefficients exceeding 0.90 for both acoustic impedance and porosity. Zones of low impedance and high porosity correspond to interpreted deltaic sands and lobate geometries, reflecting the facies heterogeneity of the F3 depositional environment. These outcomes suggest that the inversion framework effectively captures lithological variability, making it valuable for reservoir delineation in similarly complex siliciclastic systems.
Structural Configuration and Paleogeography of The “Krishna” Field in The Sunda Basin Wicaksana, Kharis Surya; Pasaribu, Dumex; Purba, Humbang
Scientific Contributions Oil and Gas Vol 48 No 4 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i4.1964

Abstract

The Krishna Field is located in the Sunda Basin and is estimated to have significant hydrocarbon potential. This study aims to analyze the subsurface conditions, geological structure configuration, and paleogeography of the field. The research utilizes 3D seismic data and drilling well data obtained from the Research and Development Center for Oil and Gas Technology “LEMIGAS”. The methodology for this study comprises several stages, namely the preparation stage, which involves a literature review and the process of acquiring supporting data. The data processing stage includes well-seismic tie, well correlation, horizon and fault picking, and the generation of structural and isopach maps. The analysis stage, in which the processed data is analyzed through electrofacies analysis, sequence stratigraphy, seismic stratigraphy, and depositional environment analysis. The results of the study indicate that during the pre-rift phase, the basement rocks were faulted by northeast-southwest trending normal faults with a dominant dip to the southeast, forming a half-graben basin structure. The Talang Akar Formation was deposited in a transitional environment as a syn-rift phase deposit. This was followed by a transgression event, marked by a rise in sea level, where the Baturaja Formation was deposited as a late syn-rift phase deposit, and subsequently followed by the Gumai Formation during the post-rift phase, which has a consistent layer thickness but a more complex and intense structure, deposited in a shallow marine environment.
Co-Authors A.S, Rosie Abdul Haris Aryanto, Muhamad Defi Basundara, Argya Basundara, Argya H Darsono Darsono Diria, Shidqi Anugrah Fadhlur Rahman, Fadhlur Hibatullah, Muhammad Irsyad Julikah, Julikah Nafian, Muhammad Pakpahan, Henry Julois Pasaribu, Dumex Prasetyo, Bagus D R.A, Saputro Ralanarko, Dwandari Riyadi, Praditio Riyadi, Pradityo Rulandoko, Wrahaspati Simarmata, Krisdanyolan Sudrazat, Sthevanie Dhita Suprajitno Munadi Tampubolon, Ricky Andrian Trivianty, Junita Wardhana, Sanggeni Gali Waskito Pranowo Wicaksana, Kharis Surya Wijaksono, Egie