STUDI FASIES DAN PEMODELAN RESERVOIR STATIS PADA INTERVAL FS 2 - FS 10 FORMASI CIBULAKAN ATAS, LAPANGAN SEKIP, CEKUNGAN CIPUNEGARA, JAWA BARAT
Sekip Field is one of the oil and gas fields in the ONWJ Block, North West Java Basin, West Java. This field is currently considered as a development field within coverage area approximately 100 km2. The study was conducted at FS 2 - FS 10 intervals which are part of the Upper Cibulakan Formation...
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Format: | Final Project |
Language: | Indonesia |
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Online Access: | https://digilib.itb.ac.id/gdl/view/41979 |
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Institution: | Institut Teknologi Bandung |
Language: | Indonesia |
Summary: | Sekip Field is one of the oil and gas fields in the ONWJ Block, North West Java Basin, West
Java. This field is currently considered as a development field within coverage area
approximately 100 km2. The study was conducted at FS 2 - FS 10 intervals which are part
of the Upper Cibulakan Formation. There are four reservoirs to be focused on this study.
The study was conducted to determine depositional and facies environments, formation
evaluation and distribution of petrophysical properties, and subsurface mapping to
determine reservoir geometry. The estimation of hydrocarbon reserves is carried out to
determine the amount of Original Oil in Place (OOIP) and Original Gas in Place (OGIP).
The data used in this study consisted of core data, and well logs from 33 wells in the study
area.
The results of the core analysis showed that FS 2 - FS 10 compiler intervals were six
sandstone lithofacies namely F1, F2, F3, F4, F5, and F6, one claystone facies namely F7
and one limestone facies, F8. Based on core, ichnofossil and electrofacies analysis, the
depositional environment is transgressive tidal ridge depositional environment in the age of
Middle Miocene. Facies associations consist of AF1 (Tidal Dominant Lower Shoreface),
AF2 (Tidal Dominated Upper Shoreface), and AF3 (Transgressive Lower Shoreface) with
maps of reservoir geometry thickness, ridge, with reservoir geometry maps of sand ridges
presents a NE-SW general trend of sedimentation. Furthermore, static reservoir modeling
is performed to model facies and petrophysics. Distribution of petrophysical properties
given effective porosity, permeability, and water saturation is qualitatively controlled by the
distribution of facies with Northeast - Southwest.
The estimated reserve results show volumes from the Reservoir 1 interval of 3.22 BCF of
gas and 3.96 MMBL of oil, Reservoir 2 of 0.90 BCF of gas and 0.49 MMBL of oil, Reservoir
3 of 0.14 BCF of gas and 1.89 MMBL oil, and Reservoir 4 of 2.69 BCF of gas and 1.89
MMBL of oil.
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