Karakteristik Geokimia Organik Batubara Air Laya 61 (AL-61) Formasi Muara Enim, Cekungan Sumatera Selatan.

Anggranty, Thasya (2022) Karakteristik Geokimia Organik Batubara Air Laya 61 (AL-61) Formasi Muara Enim, Cekungan Sumatera Selatan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kajian Geokimia Organik melalui analisis biomarka Batubara Air Laya-61 (AL-61) Formasi Muara Enim, Cekungan Sumatera Selatan telah berhasil dilakukan. Analisis dilakukan dengan metode ekstraksi, fraksinasi, dan identifikasi menggunakan Kromatografi Gas-Spektrometer Massa (KG-SM). Kelimpahan homolog n-alkana dengan pola bimodal, parameter seperti Parameter CPI(1,61), LMW/HMW(0,03), LHCP(0,18), ACL(29,67), Wax Index(0,14), AlkTerr(0,51), TAR(24,00), Paq(0,18) C31/C19(33,96), C17/C29(0,08), C17/C31(0,03), biomarka hidrokarbon aromatik derivat naftalena, derivat fenantrena, serta kelompok aromatik triterpenoid pentasiklik mengindikasikan sampel Batubara AL-61 Formasi Muara Enim berasal dari berbagai sumber. Nilai CPI>1, LHCPI<1, rasio C31αβ22S/(22S + 22R)<1, keberadaan senyawa hopanoid isomer ββ, dan dominasi senyawa tak jenuh menunjukkan tingkat kematangan termal rendah. Senyawa organik pada Batubara AL-61 terendapkan dalam lingkungan oksik yang ditunjukkan rasio Pr/Ph>3 dan Diagram Hunt. Berdasarkan plot pada diagram Hunt, batubara AL-61 termasuk kerogen campuran tipe II/III yang berpotensi menghasilkan gas dan minyak (gas prone dan oil prone). Melalui karakteristik geokimia organik yang telah dilakukan, sampel Batubara AL-61 berpotensi untuk dimanfaatkan sebagai sumber CBM (Coal Bed Methane).
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The study of Organic Geochemistry through biomarker analysis of Air Laya-61 (AL-61) Muara Enim Formation, South Sumatra Basin has been successfully carried out. The analysis was carried out using the method of extraction, fractionation, and the use of Gas Chromatography-Mass Spectrometer (GC-MS). The abundance of homologous n-alkanes with a bimodal pattern, parameters such as Parameters CPI (1,61), LMW/HMW (0,03), LHCP (0,18), ACL(29,67), Wax Index(0,14), AlkTerr(0,51), TAR(24,00), Paq(0,18) C31/C19(33,96), C17/C29(0,08), C17/C31(0,03), biomarkers of aromatic hydrocarbons derived from naphthalene, phenanthrene derivatives, and pentacyclic triterpenoid aromatic groups indicate that the AL-61 Coal sample of the Muara Enim Formation came from various sources. CPI>1, LHCPI<1, ratio C31αβ22S/(22S + 22R)<1, the presence of isomeric hopanoid compounds, and the predominance of unsaturated compounds indicate a low level of thermal maturity. Organic compounds in AL-61 Coal were deposited in an oxic environment indicated by the Pr/Ph>3 ratio and Hunt Diagram. Based on the plot on the Hunt diagram, AL-61 coal is a type II/III mixed kerogen which has the potential to produce gas and oil (gas prone and oil prone). Through the organic geochemical characteristics that have been carried out, the AL-61 Coal sample has the potential to be used as a source of CBM (Coal Bed Methane).

Item Type:	Thesis (Other)
Additional Information:	RSKi 553.2 Ang k-1 2022
Uncontrolled Keywords:	Geokimia organik, Biomarka, Batubara, Muara Enim, KG-SM. Organic geochemistry, Biomarker, Coal, Muara Enim, GC-MS.
Subjects:	T Technology > TP Chemical technology > TP248.3 Biochemical engineering. Bioprocess engineering
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	06 May 2026 02:58
Last Modified:	06 May 2026 02:58
URI:	http://repository.its.ac.id/id/eprint/133001

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