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All Journal Geological Engineering E-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)
Asep Kurnia Permana
Center for Geological Survey
Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science

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MIKROFASIES DAN DIAGENESIS BATUGAMPING BERDASARKAN DATA PETROGRAFI PADA FORMASI NAKFUNU DI DAERAH TIMOR TENGAH SELATAN Maryanto, Sigit; Permana, Asep Kurnia
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 3 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Microfacies and diagenesis of limestones from the Nakfunu Formation have been studied to tracing the depositional mechanism and post depositional geological histories of the rocks. Limestone samples randomly taken from the field on the Cretaceous rock formation, for petrographic analysis. Petrogrtaphic analysis of the fourty two limestone samples showing that the type of the limestones are packstone, wackestone, and mudstone. The depositional environments of this formation are include basin margin, open sea shelf near the lower slope, and deep sea basin with slow sedimentation. The limestones have affected by various kinds of diagenetic proccesses post-sedimentation. The diagenetic procceses recorded under the polarization microscope as: cementation, replacement, silicification, recrystallization, dolomitization, compaction, fracturing, and dissolution.Keywords: Cretaceous, limestone, petrography, microfacies, diagenesis.
CLEAT CHARACTERISTICS IN TERTIARY COAL OF THE MUARAENIM FORMATION, BANGKO AREA, SOUTH SUMATERA BASIN: Implications for Coalbed Gas Potential Permana, Asep Kurnia; Panggabean, Hermes
Jurnal Geologi dan Sumberdaya Mineral Vol 21, No 5 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The sub-bituminous coal seams of the Muaraenim Formation commonly overlie claystone, sandstone or shaly siltstone. Coal seams are mostly dull to bright banded lithotype, well developed of cleat system, maceral composition dominated by vitrinite with rare inertinite and minor liptinite and mineral matter. In order to determine cleat systems and a possible relationship with the development of coalbed gas potential within the coal seams, detailed observation on coal seams characteristics, determination and measurement on cleat pattern and orientation, as well an insitu gas in place content measurement (Q1) within the coal measures were performed. Field measurement from outcrops demonstrate well-developed cleat within the coal seams, with high in spacing (∑ 8.93 cm) and moderate in density (0.1512/cm - 0.21/cm) and cleat aperture (1 - 3 mm). SEM analysis provides microcleat characteristics with a rare to medium density. Micro focus observation and examination on microcleat, face microcleats appears to be most prominent compared to butt microcleats. Microcleats also found mostly in open aperture. Gas content of the coal seam indicates a low to moderate methane content, with overall calculation of gas in place from six coal seams around 15.297,73 scf. Moderate level of mineral matter content in coal, as well as an excessive rare of clay minerals infill in microcleat may influence on increasing methane adsorption capacity. Moderate to high density and well continuity of cleat and microcleat could affect enhancing permeability, and plays important role in methane migration and production. Indeed, the coal characteristics and cleat systems of the Muaraenim Formation maybe favorable for coalbed gas potential.Keyword: Coalbed gas, Cleat systems, Muaraenim Formation
Model Fasies Batuan Karbonat Formasi Wainukendi di Cekungan Biak-Yapen, Papua Permana, Asep Kurnia; Shima, Joshua; Maryanto, Sigit; Wahyudiono, Joko
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 2 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (923.166 KB) | DOI: 10.33332/jgsm.geologi.20.2.101-110

Abstract

This paper provides the carbonate rocks facies model of the Wainukendi Formation. Several outcrops are well exposed in the Southern part of the Supiori Island. The main data are taken from 28 outcrops and 25 measured sections. Thirty seven rocks samples from the Korido dan Warvey Sections were collected and have been petrographic examination for microfacies analysis. Finally, the analysis find that the Wainukendi Formation basically composed by bioclastic carbonate platform and reef margin platform. Microfacies analysis indicate that these carbonate platforms consist of 4 facies zone, deep shelf (FZ2), toe of slope (FZ3), slope (FZ4), and platform margin (FZ5). Keywords: Facies, stratigraphy, Wainukendi Formation, Biak-Yapen Basin.
Review of Geological Framework and Hydrocarbon Potential of the Banyumas Basin Permana, Asep Kurnia; R. Setiawan; Marjiyono; G.M. Lucki Junursyah; Hidayat; D. Yurnaldi; E.Y.Patriani; A. Setiawan
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 4 (2024): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v25i4.872

Abstract

The presence of numerous oil and gas seeps along the Pamanukan-Cilacap Fault Zone of the Banyumas Basin. This indicate that the Banyumas Basin is an active petroleum system. However, oil and gas exploration in this area is complicated by extensive volcanic rocks from Paleogene to Recent Times. Thick volcanic covers are responsible for the poor seismic data quality and making subsurface imaging is difficult. Therefore, there is prospective sedimentary sequence beneath the volcanic rock as potential hydrocarbon resources in this basin. This review will focus on geochemical and geophysical approach. Geochemical analysis was used to reveal petroleum generation underneath the volcanic cover. The combined geophysical methods, i.e. gravity, magnetotelluric and passive seismic tomography were applied to image subsurface sedimentary thickness and geology structure in this area. Biomarker analysis of oil seeps from study area indicates that the oil generation in the Banyumas Basin was derived from Late Cretaceous to Eocene sedimentary rocks which deposited in fluvial to deltaic environment. The gravity data delineation analysis shows two sedimentary sub basins, Majenang Sub Basin and Citanduy Sub Basin, a relatively northwest to southeast trends, correlates with the regional structural trend. These sub basins were also well determined from magnetotelluric data. The passive seismic tomography method enhancing the sub surface image. The Vp, Vs and Vp/Vs ratios can identify the sedimentary layer under the volcanic rocks, as well as geological structure feature within the basin. The flower structure and anticline structure are well imaged and could be the potential structural trap in the Banyumas Basin. Thus, this new insight provides opportunities for further petroleum exploration in this area. Keyword: Geochemistry, Banyumas Basin, passive seismic tomography, hydrocarbon potential  
Co-Authors A. Setiawan A.H Prastian, A.H Andi Heri Prastian Aries Kusworo D. Yurnaldi E.Y.Patriani Fahrudin Fahrudin G.M. Lucki Junursyah Hadi Nugroho Hermes Panggabean Hidayat Joko Wahyudiono Joshua Shima Koesnama Koesnama, Koesnama Marjiyono R. Setiawan Sigit Maryanto Syaiful Bachri