Petrophysical Analysis to Determine Reservoir and Source Rocks in Berau Basin, West Papua Waters

• Published in: Bulletin of the marine geology (Bandung) Vol. 35; no. 1
• Main Authors: Indriyani, Popy Dwi, Harja, Asep, Nainggolan, Tumpal Bernhard
• Format: Journal Article
• Language: English
• Published: Marine Geological Institute of Indonesia 02-06-2020
• Subjects: berau basin; kembelangan formation; permeability; porosity; reservoir; shale volume; source rock; tipuma formation; water saturation
• ISSN: 1410-6175; 2527-8843
• DOI: 10.32693/bomg.35.1.2020.659

Berau Basin is assessed to have same potential in clastic sediments with Mesozoic and Paleozoic ages, where reservoirs and source rocks are similar to productive areas of hydrocarbons in Northwest Shield Australia. This study aims to identify the hydrocarbon prospect zones and potential rocks zones using petrophysical parameters, such as shale volume, porosity, water saturation and permeability. Petrophysical analysis of reservoir and source rock are carried out on three wells located in the Berau Basin, namely DI-1, DI-2 and DI-3 in Kembelangan and Tipuma Formation. Qualitative analysis shows that there are 4 reservoir rock zones and 4 source rock zones from thorough analysis of these three wells. Based on quantitative analysis of DI-1 well, it has an average shale volume (Vsh) 9.253%, effective porosity (PHIE) 20.68%, water saturation (Sw) 93.3% and permeability (k) 55.69 mD. DI-2 well’s average shale volume, effective porosity, water saturation and permeability values are 29.16%, 2.97%, 67.9% and 0.05 mD, respectively. In DI-3 well, average shale volume, effective porosity, water saturation and permeability values are 6.205%, 19.36%, 80.2% and 242.05 mD, respectively. From the reservoir zone of these three wells in Kembelangan Formation, there are no show any hydrocarbon prospect.