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Upper Kutai Basin is a part of the Kutai Basin, the biggest and the deepest tertiary basin in western Indonesia. Unlike the prolific Lower Kutai Basin that proven with several oil and gas fields, this area consider “frontier” for exploration activity from its lack of number well drilled and ra...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/15025 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Upper Kutai Basin is a part of the Kutai Basin, the biggest and the deepest tertiary basin in western Indonesia. Unlike the prolific Lower Kutai Basin that proven with several oil and gas fields, this area consider “frontier” for exploration activity from its lack of number well drilled and rare commercial discoveries. In 1982, UNOCAL discover gas in Kerendan area from carbonate reservoir, but ever since no more commercial discoveries reported. Saller & Vijaya (2002) engaged a comprehensive study of Kerendan model from analysis of core, log, seismic and field mapping. The model showed Kerendan as a Rim-Atoll system in the isolated platform. In 2013, core analysis was relooked by Wilson as a confirmation to rim-atoll system, however Wilson interpret Kerendan as a platform-interior system model. This study was conducted to reconstruct the type of carbonate platform in the Late Oligocene by identifying the reservoir, carbonate facies and its association to get proper geological model for hydrocarbon prospectivity. Core analysis was analyzed refer to Wilson core description and interpretation (2013) and Saller & Vijaya journal (2002). Well correlation was deliberated in more regional fashion, and seismic interpretation was conducted in all possible seismic in the study area with seismic-facies constrain. This study displayed several carbonate build-ups were identified in some places around the area and similar to Kerendan carbonate in shape and dimension. These carbonate build-ups shows a depositional pattern of a platform interior system. This build-up phase occurred in transgression period during Oligocene age with a clear picture in Late Oligocene. The distribution was controlled by basin configuration during deposition, restricted by a relative basin high related to the structures that active during Eocene rifting. Carbonate reservoir has proven to be a gas field in Kerendan, postulated that the other carbonate build–ups identified in this area have a prospectivity for hydrocarbon (gas) trap. |
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