STATIC AND DYNAMIC ANALYSIS OF SHALYSAND RESERVOIR CHARACTERIZATION IN BEKASAP FORMATION FOR FIELD DEVELOPMENT AT PUNGUT OIL FIELD
Pungut field in Central Sumatra Basin has produced 64.8 MMBO since October 1957 the majority of which has come from Lower Miocene age of Bekasap and Bangko Formation reservoirs. To date, there were 39 wells have been drilled. The depletion of average reservoir pressure close to bubble point cause...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/11228 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Pungut field in Central Sumatra Basin has produced 64.8 MMBO since October
1957 the majority of which has come from Lower Miocene age of Bekasap and
Bangko Formation reservoirs. To date, there were 39 wells have been drilled. The
depletion of average reservoir pressure close to bubble point caused the
decreasing of oil production in this structure. Therefore, a waterflood project then
applied to moving remaining reserves since January 2005.
This research was performed in an attempt to gain a better understanding on shalysand
reservoir characteristic of Bekasap Formation in Pungut Oil Field, Central Sumatera
Basin. Based on several wells data in this field reveals a variation of reservoir
characteristic, specially heterogeneity and facies distribution, which affected the quality
of reservoir. In order to solve this problem, an integrated static and dynamic study was
carried out, which include core description, stratigraphic analysis, seismic attribute
analysis, geometry and property mapping and production data.
The lithological study was end up with an identification of five facies association named
Tidal Channel, Tidal Sand Flat, Mud Flat and Tidal Sand Bar which were interpreted as
Estuarine deposition environment. Generally, these B and C reservoir were deposited in a
Transgressive condition (Transgressive System Tract).
The studied of both reservoir B and C concluded that reservoir B has a better quality
reservoir compare to reservoir B in term of porosity and permeability. The differences
exhibit a reservoir heterogeneity, which were controlled by facies and its depositional
environment. Validation of dynamic data was also confirmed this analysis.
By having a better understanding on reservoir B and C characteristics, a proper
methods/application can be applied to optimize oil production as part of a plan for
further development (POFD). |
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