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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Moh. Heri Hermiyanto Zajuli
Center for Geological Survey, Geological Agency
Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science

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Hydrocarbon Source Rock Potential of the Sinamar Formation, Muara Bungo, Jambi Zajuli, Moh. Heri Hermiyanto; Panggabean, Hermes
Indonesian Journal on Geoscience Vol 1, No 1 (2014)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (690.87 KB) | DOI: 10.17014/ijog.v1i1.175

Abstract

DOI: 10.17014/ijog.v1i1.175The Oligocene Sinamar Formation consists of shale, claystone, mudstone, sandstone, conglomeratic sandstone, and intercalation of coal seams. The objective of study was to identify the hydrocarbon source rock potential of the Sinamar Formation based on geochemichal characteristics. The analyses were focused on fine sediments of the Sinamar Formation comprising shale, claystone, and mudstone. Primary data collected from the Sinamar Formation well and outcrops were analyzed according to TOC, pyrolisis analysis, and gas chromatography - mass spectometry of normal alkanes that include isoprenoids and sterane. The TOC value indicates a very well category. Based on TOC versus Pyrolysis Yields (PY) diagram, the shales of Sinamar Formation are included into oil prone source rock potential with good to excellent categories. Fine sediments of the Sinamar Formation tend to produce oil and gas originated from kerogen types I and III. The shales tend to generate oil than claystone and mudstone and therefore they are included into a potential source rock. 
Hubungan Kelompok Maseral Liptinit dan Vitrinit dengan Tipe Kerogen Batuan Sumber Hidrokarbon pada Serpih Formasi Kelesa Bagian Atas, Kuburan Panjang, Riau Zajuli, Moh. Heri Hermiyanto; Panggabean, Hermes; Hendarmawan, Hendarmawan; Syafri, Ildrem
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

This study focuses on correlation of liptinite and vitrinite maceral to kerogen type of shale from Kelesa Formation in Kuburan Panjang areas, Sumai sub-basin, Central Sumatra Basin. The composition of the organic material consists of vitrinite maceral ranged from 0.2 to 5%, liptinite from 0.6 to 4.7%, the type of minerals in the form of pyrite from 0.2 to 16%, and 0.2 -24.2% of carbonate, as well as clay minerals are the most dominant component ranged between 71.6 -98%. TOC values of the shale range from 1.18% to 7.17%, which indicate ability of the shale as a good source rock. Kerogen type analysis of theshale in the research area tends to indicate I, II and III kerogen types. There is an influence of the liptinite and vitrinite maceral groups abundance to the type of kerogen, where liptinit maceral group tends to produce type I and II kerogen. Key word : Kelesa Formation, Eocene-Oligocene, Central Sumatera Basin, Vitrinite, Liptinite
Rock-Eval Characteristic of Oligosen Fine-grained Sedimentary Rocks from Pamaluan Formation, Gunung Bayan Area, West Kutai Basin, East Kalimantan : Implication for Hydrocarbon Source Rock Potential Zajuli, Moh. Heri Hermiyanto; Wahyudiono, Joko
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 2 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

In this study, we apply organic geochemistry analysis for evaluating source rocks in Gunung Bayan Areas, West Kutai Basin. Subject of this research are Oligocene fine-grained sedimentary rocks of Pamaluan Formation on Gunung Bayan Areas. The Oligosen fine-grained sedimentary rock of Pamaluan Formation consists of shale, siltstone and claystone. The organic geochemistry analysis includes pyrolysis data as total organic carbon(TOC%), generating source potential (S2), production index (PI), oxygen and hydrogen indices(OI, HI) and (Tmax). The results show that the Oligocene source rocks have poor into good quality with type III kerogen and have true capability to generate  gas. The source rocks candidate is  characterized by HI 5 - 115 (mg/g), TOC from 0.19 to 1.78 wt%, S1 from 0.01 to 0.09 (mg/g) and S2 from 0.05 to 1.74 (mg/g) that indicating poor to fair source rocks with type III kerogen and capable of generate  gas. The maturity of the fine-grained sedimentary rocks tend to indicate immature to mature stage. Overall fine-grained sedimentary rocks of Pamaluan Formation has capability to produced gas with poor to fair quality. 
Clay Mineral Characteristics of the Damar Formation in the Southern Part of the Coastal Area of Semarang and Kendal, Central Java Wafid A.N., Muhammad; Zajuli, Moh. Heri Hermiyanto; Suyono, Suyono; W, Hermawan; Irzon, Ronaldo
Jurnal Geologi dan Sumberdaya Mineral Vol. 26 No. 3 (2025): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v26i3.997

Abstract

The study area is located in the southern part of the Coastal area of Semarang and Kendal, Central Java. The fine-grained sedimentary rocks of Damar Formation comprise tuffaceous mudstones, volcanic breccias, sandstones, tuffs and conglomerates; with occasional lava deposits and volcanic materials within alluvial fan deposits. The purpose of this study is to provide data on the characteristics of fine-grained sedimentary rocks of the Damar Formation including physical characteristics, diagenesis processes, and their implications for the history of rock accumulation. Based on Scanning Electron Microscope (SEM) analysis of four claystone samples from the Damar Formation consist of illite (K1-1.5 Al4 (Si7 6.5 Al1-1.5 O20 )(OH)4 , mixed illite (K1-1.5 Al4 (Si7-6.5 Al1-1.5 O20 ) (OH)4 - smectite (1/2Ca)0.7 (Al,Mg,Fe)4 (Si,Al)8 O20 ).nH2 O and kaolinite (Al4 (Si4 O10 )(OH)8 . Other minerals include silica or quartz fractions and feldspar. Kaolinite is the most prominent clay mineral identified in all claystone samples analysed, although the clay textures seem to be irregular shapes of Damar Formation has undergone a diagenetic process within a mesodiagenetic level indicating sediment burial at depths of 2,500–4,000 m by temperature ranging from 80° to 120°C. Keywords: Damar Formation, SEM, diagenesis, clay mineral, illite Abstrak Area studi terletak di bagian selatan pantai Semarang dan Kendal, Jawa Tengah. Sedimen berbutir halus dari Formasi Damar terdiri dari batulumpur tufaan, breksi vulkanik, batupasir, tuf, dan konglomerat, dengan setempat deposit lava dan material volkanik dengan endapan kipas aluvial. Tujuan dari studi ini adalah untuk menyediakan data terkait karakteristik dari batuan sedimen berbutir halus dari formasi Damar termasuk karakter fisik, proses diagenesis, dan implikasinya untuk sejarah akumulasi batuan. Berdasarakan Mikroskop Scanning Elektron (SEM) analisis dari 4 (empat) percontoh batulempung Formasi Damar terdiri dari illit (K1-1.5 Al4 (Si7-6.5 Al1-1.5 O20 ) (OH)4 , campuran illit (K1-1.5 Al4 (Si7-6.5 Al1-1.5 O20 )(OH)4 - smektit (1/2Ca)0.7 (Al,Mg,Fe)4 (Si,Al)8 O20 ).nH2 O dan kaolinit (Al4 (Si4 O10 )(OH)8 . Mineral lainnya adalah silika atau kuarsa berupa fraksi, felspar. Mineral lempung kaolinit merupakan mineral lempung yang paling menonjol dari analisis batu lempung, meskipun tekstur lempungnya berbentuk kurang teratur yang menandakan proses diagenesis pada level mesodiagenesis yang pernah terpendam sampai 2500 – 4000 meter dengan temperatur berkisar 80o – 120o. Kata kunci: Formasi Damar, SEM, diagenesis, mineral lempung, illit  
Co-Authors Hendarmawan Hendarmawan, Hendarmawan Hermes Panggabean Ildrem Syafri Joko Wahyudiono Ronaldo Irzon Suyono Suyono W, Hermawan Wafid A.N., Muhammad