ORGANIC GEOCHEMICAL AND ORGANIC PETROGRAPHIC CHARACTERIZATION OF UPPER MEMBER OF TELISA FORMATION OIL SHALES
Administratively, research area is located in Pangkalan and surrounding areas, Kuantan Singingi Regency, Riau Province. Geologically, research area is located in Central Sumatra Basin. Shale samples amount used in this research are eleven and taken by outcrop drilling which is conducted in Upper...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/34360 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Administratively, research area is located in Pangkalan and surrounding areas, Kuantan
Singingi Regency, Riau Province. Geologically, research area is located in Central Sumatra
Basin. Shale samples amount used in this research are eleven and taken by outcrop drilling
which is conducted in Upper Member of Telisa Formation. Based on drilling data, shale oil
layers in research area consist of four layers, they are A Layer, B Layer, C Layer, and D
Layer.
Analyses of organic geochemistry and organic petrography were conducted to eleven
samples of Upper Member of Telisa Formation to determine characteristic of quantity,
maturity, and quality of organic matter. Analyses of organic geochemistry and organic
petrography which were conducted consist of Rock-Eval pyrolysis, vitrinite reflectance
analysis, and organic matter composition analysis. Based on analysis results, oil shales in A
and B Layers have good to excellent quantity category, immature stage of maturity, and
belong to type I and II, meanwhile oil shales in C and D Layers have poor quantity category,
immature stage of maturity, and belong to type III. Based on maceral composition data, it is
known that A and B Layers composition is dominated by alginite maceral, meanwhile C and
D Layers compositon is dominated by vitrinite maceral. Oil shales characteristic that had
been determined is compared with retort data result in research area. Comparison result
shows that amount of oil from retorting has linear positive relationship with value of alginite
percentage, TOC, S1, S2, S3 and HI, meanwhile amount of oil from retorting has linear
negative relationship with value of mineral percentage and OI. Based on maceral
composition data and core data, depositional environment of A and B Layers is interpreted
in freshwater lacustrine, while depositional environment of C and D Layers is interpreted in
estuary. Based on retort data and calculation of production cost, it could be concluded that
oil shales in Upper Member of Telisa Formation in research area when the study is conducted
is not economically produced. |
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