RESERVOIR CHARACTERIZATION OF PEMATANG 6200 AND MENGGALA 5900 OF BARUMUN SUB-BASIN USING INTEGRATION OF SEISMIC ATTRIBUTE ANALYSIS AND SPECTRAL DECOMPOSITION

• Main Author: Sutyarsa, Kuntadi
• Format: Theses
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/70757
• Institution: Institut Teknologi Bandung

Barumun sub basin is the northernmost sub basin in Central Suamtera Basin. High resolution 3D Seismic data which was acquired in 2003 and new exploratory well data in the 3D seismic area very useful to understand depositional system in Barumun sub basin. The objectives of this research are to understand depositional system, facies distribution and understanding reservoir characterization thin layer sand in upper Pematang group and lower Sihapas group. The main methodology in this research is using information from normal amplitude of 3D seismic data, also using seismic attribute extraction and spectral decomposition to view development geometry patterns in Barumun sub basin. Those results were cross correlated each other to interpret comprehensively to understand depositional environment and tracking thin bed layer. The existing well data was used to validate the result. The research’s results show that the integration between seismic attributes and spectral decomposition successful to characterize thin bed reservoir in Pematang 6200 Formation and Menggala 5900 Formation. Pematang 6200 is dominated by fluvial depositional of braided meandering stream, while Menggala 5900 is depositional transition of marine and non marine with fluvial depositional of meandering, estuarine and delta. This contrast depositional environment from Pematang to Menggala from non marine to marine indicates tectonic regional change.