COMPETING PHENOMENON MODELLING OF TWO PHASE MULTI-FEED ZONE WELL IN ULUMBU GEOTHERMAL FIELD
Optimization of production wells is one of the keys to the successful operation of a geothermal power plant. The ULB-1 was initially a production well, but its production was irregular or cyclic because it has a multi-feed zone. When the wellhead pressure is low, the produced fluid is a single ph...
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| Format: | Theses |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/72823 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Optimization of production wells is one of the keys to the successful operation of a
geothermal power plant. The ULB-1 was initially a production well, but its
production was irregular or cyclic because it has a multi-feed zone. When the
wellhead pressure is low, the produced fluid is a single phase, while at high
wellhead pressure, a two-phase is produced. This study aims to analyze the feed
zone’s area and characteristics and to model the wellbore and the reservoir to
produce the maximum wellhead pressure that produces one vapor phase from the
ULB-1 well. PTS analysis obtained three feed zones at 920 m, 790 m, and 690 m.
Wellbore & reservoir models show a competing phenomenon around the feed zone
area when the ULB-1 well is produced at a different WHP. The results of the
wellbore modeling (top-down) obtained the maximum wellhead pressure to
produce a single phase of steam, which is 4.8 bar with a mass flow rate of 5.73 kg/s
of steam. Studying the coupled model between the wellbore and reservoir is
recommended to get more representative results. |
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