DRY HOLE AND PETROLEUM SYSTEM ANALYSIS IN "X" STRUCTURE, AKIMEUGAH BASIN, PAPUA, INDONESIA
The Akimeugah Basin is located in Bird’s Body of Papua, but this basin does not have an oil and gas production field. In this basin, oil and gas seepage was found which was reported during the seismic survey. And the drilled wells also show the presence of hydrocarbons and traces of hydrocarbons, na...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/80505 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The Akimeugah Basin is located in Bird’s Body of Papua, but this basin does not have an oil and gas production field. In this basin, oil and gas seepage was found which was reported during the seismic survey. And the drilled wells also show the presence of hydrocarbons and traces of hydrocarbons, namely in wells KM-1 and KR-1. It indicates the existence of a petroleum system at work in this basin. Another factor that makes this basin interesting is that in the western part of Papua New Guinea, precisely in Papua New Guinea, the basin in the Papuan bird's body with almost the same geological structure has found a lot of oil and natural gas and has been produced. There was no accumulation of hydrocarbons in the KM-1 and KR-1 wells, indicating that there are elements and processes in the petroleum system that are not good.
The methodology used in this study is to evaluate the existing petroleum system in the research area. The evaluation of the petroleum system includes the evaluation of source rock, reservoir, caprock, trap, and migration. The purpose of this evaluation is to evaluate a petroleum system that is not working properly. So that it can be seen the cause of the absence of accumulation in the KM-1 and KR-1 wells.
Based on the evaluation of the source rock, the Miocene (type III), Cretaceous (type II/III), and Jurassic (type II/III) intervals are potential source rocks (TOC>1). The maturity window for the expulsion of hydrocarbons is 2447.5 m, the estimated hydrocarbon generation is 280.33 x 1010 bbl for oil and 15,714 tcf for gas. Potential reservoir intervals are Miocene interval, Cretaceous interval, and Silurian-Devonian interval. The potential cap rocks are in the Miocene, Cretaceous, and Jurassic intervals. Hydrocarbon migration is estimated during the Miocene – Pleistocene until now. The traps formed are pinnacle reef (stratigraphy) and basement drape (structure). The cause of the failure in the Miocene interval is that the source rock is classified as early mature so that the hydrocarbons that experience expulsion and migration are still quite low. In the Jurassic interval caused by ineffective hydrocarbon traps. While the Silur-Devon interval is caused by poor reservoir quality (tight). |
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