HOW FAR THE ROCK TYPE AND LIMESTONE FACIES ARE INTERRELATED: A CASE STUDY IN OILFIELD, BANGGAI BASIN, CENTRAL SULAWESI
| Main Authors: | Muhammad, Fachry, Benyamin, Benyamin, Herdiansyah, Firman, Widyasari, Andhika |
|---|---|
| Format: | Proceeding PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
Departemen Teknik Geologi
, 2019
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/275725/1/A027UNE.pdf https://repository.ugm.ac.id/275725/ |
Daftar Isi:
- Located in the Central Sulawesi, this study about relation between rock type and limestonefacies can be known using qualitative and quantitative analysis. Qualitative analysis consist offacies analysis and quantitative analysis consist of quantify petrophysical property toperforming rock grouping based on Flow Zone Indicator. Qualitative analysis shows that thelithology dominantly consists of limestone. Then based on facies analysis shows there arethree reef system that are back reef lagoon, core reef and fore reef. Reef system thatarranged by lithofacies consists of wackstone with very good vuggy, packstone, grainstoneand mudstone. In the quantitative analysis based on petrophysical value there are consistfour rock type, wackstone with very good vuggy is dominated with rock type 1 which hasvalue of FZI > 1.32 micrometers, permeability 11.05 - 2233.98 md and porosity 16% - 42%.The packstone is dominated with rock type 2 which has value of FZI 1.31 - 0.66 micrometer,permeability 2.08 - 38.17 md, porosity 13% - 29%. The grainstone is dominated with rock type3 which has value of FZI 0.65 - 0.38 micrometers, permeability 0.1 - 8.89 md, porosity 8% -24% and the mudstone is dominated with rock type 4 has a value of FZI < 0.37 micrometer,permeability 0.01 - 0.16 md, porosity 6% - 12%. The relation between rock type and reef system facies is unrelated, but the rock type with lithofacies has a bit related which consistsof wackstone with very good vuggy has an excellent rock type, packstone has a good rocktype, grainstone has a fair rock type and mudstone has a poor rock type, there are due to thepresence of diagenetic control in carbonate rocks.