CARBONATE RESERVOIR CHARACTERIZATION OF BATURAJA FORMATION, PDW FIELD, PALEMBANG SUB-BASIN, SOUTH SUMATRA BASIN
PDW field located in Palembang sub-Basin, South Sumatra Basin, has been proven to produce hydrocarbon, especially gas and condensate from Baturaja Formastion. Further field development needs to be done because of the evidence of five exploration well and it's production only derived from POP (P...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/41547 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | PDW field located in Palembang sub-Basin, South Sumatra Basin, has been proven to produce hydrocarbon, especially gas and condensate from Baturaja Formastion. Further field development needs to be done because of the evidence of five exploration well and it's production only derived from POP (Production On Perforation). By doing detailed analysis offacies deposition, diagenetic process, and rock typing, this analysis is expected to provide better result of carbonate reservoir characterization and potential so the development in PDW filed could be more efficient.
Baturaja Formation in PDW field consist of six lithofacies based on Dunham and Embry & Klovan clasification, (1) Bioclastic rudstone, (2) bioclastic floatstone, (3) Coral Bindstone, (4) Coral Rudstone, (5) Foraminifera bioclastic packstone, and (6) Foraminifera bioclastic wackestone. There are three main facies association in this study which is platform, slope, and basinal. Based on routine core data in PMT-1 well, six PRT (Petrophysical Rock Type) could be described there are (1) PRT 1 - Bioclastic interparticle, moldic, dan vuggy mesopore-macropore, (2) PRT 2 - Moldic dan interparticle micropore-macropore, (3) PRT 3 - Vuggy dan interparticle micropore - macropore, (4) PRT 4 - Rudstone interparticle micropore, (5) PRT 5 - Interparticle micropore, (6) PRT 6 - Bioclastic interparticle micropore. Six identified PRT have certain connection of porosity and permeability with high correlation coefficient. Diagenetic process that control the quality of reservoir is micritization, dissolution, neomorphism, and burial. Dissolution process has increase the reservoir qualitywhich dominantly occur in PRT 1 and PRT 2, while micritization, neomorphism, and burial decrease the reservoir quality mostly occur in PRT 4, PRT 5, and PRT 6.
Reservoir quality is strongly influenced by spatial distribution of PRT. Wells which dominated by PRT 1 and PRT 2 show high production of hydrocarbon, while other wells which PRT 1 and PRT 2 not dominant has low production.
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