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All Journal Geological Engineering E-Journal IJOG : Indonesian Journal on Geoscience Indonesian Journal on Geoscience Indonesian Journal on Geoscience
Andi Heri Prastian
Program Studi Teknik Geologi Universitas Diponegoro, Semarang
Earth & Planetary Sciences Engineering

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ANALISIS FASIES BATUAN PERM-TRIAS DAN PROSPEKSI BATUAN INDUK DAN RESERVOIR DI CEKUNGAN TIMOR, NUSA TENGGARA TIMUR Prastian, Andi Heri
Geological Engineering E-Journal Vol 6, No 1 (2014): Volume 6, Nomor 1, Tahun 2014
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5159.752 KB)

Abstract

Timor Basin is one of the basin in the Eastern Indonesia wich could has a greatest hydrocarbon potential, however the geological conditions are poorly understood due to the complexity of geological condition, lack of geological and geophysical data, and overwhelming of many different geological concept. This research were conducted in the Kekneno Area, Nenas, South Central Timor, East Nusa Tenggara.The purpose of this study is to arrange a complete sequence of lithostratigraphy, analysis of depositional environment facies, macropaleontological, petrographic and organic petrology analysis. It could compare the relationship between rocks deposited in specific depositional environment with potential as a reservoir and source rock.The method of this study is done by geological field observation by measuring stratigraphic section in some geological traverses to taking the stratigraphy data in detail, and laboratory analysis as petrographic analysis, paleontology, and organic petrology.The result of the facies analysis show that Permian aged rocks deposited on the Middle Fan and Lower to Upper Slope Facies. The Triassic rocks deposited on the Outer Fan, Outer Shelf to Upper Slope, Middle Fan and Inner Fan Facies. From analysis of organic petrology, rock as a potential source rock is black shale of Niof Formation deposited on Outer Fan Facies, with high Vitrinite Maceral composition (87.1%) were included in the Gas Prone Potential category (>95%). Sandstones of Babulu and Cribas Formation from petrographic anaysis indicate poorer levels percentage of porosity is very small (<5%) were included in the classification of bad, so both of the formations are not good potential as a reservoir.
Characteristics of the Triassic Source Rocks of the Aitutu Formation in the (West) Timor Basin Permana, Asep Kurnia; Kusworo, Aries; Prastian, Andi Heri
Indonesian Journal on Geoscience Vol 1, No 3 (2014)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3653.822 KB) | DOI: 10.17014/ijog.v1i3.192

Abstract

DOI:10.17014/ijog.v1i3.192The Triassic rocks of the (West) Timor Basin have been identified that was mainly deposited in the  marine environment. The fine grained clastics and carbonate  rocks of this Triassic marine  facies are considered to be the most promising source rocks potential in this basin. In this paper we present geochemical and petrographic data from outcrop samples of the Triassic carbonate Aitutu Formation, due to emphasized the organic maturation, kerogen type of the organic matter and the origin of the organic matter.  A representative of selected sample were subjected to the Rock-Eval Pyrolisis, vitrinite reflectance and thermal alteration index, bitumen extraction, were analyzed on the GC-MS. The samples were collected from marine deposit of the Triassic Sequence. The TOC values of the analyzed sample range between rich and rich organic richness (0.51% - 9.16%, wt.%, TOC), which consists mainly of type II and III kerogen and the organic matter consider to be predominantly oil/gas prone and gas prone potential. The thermal maturity assessed from Tmax, TAI, and vitrinite reflectance shows an immature to early peak mature stage of the organic matter. The GC-MS analyses of the biomarkers indicate mainly the organic matter derived from mixed source rocks facies containing alga debris and higher plant terrestrial origin.
Characteristics of the Triassic Source Rocks of the Aitutu Formation in the (West) Timor Basin Permana, Asep Kurnia; Kusworo, Aries; Prastian, Andi Heri
Indonesian Journal on Geoscience Vol 1, No 3 (2014)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3653.822 KB) | DOI: 10.17014/ijog.1.3.165-174

Abstract

DOI:10.17014/ijog.v1i3.192The Triassic rocks of the (West) Timor Basin have been identified that was mainly deposited in the  marine environment. The fine grained clastics and carbonate  rocks of this Triassic marine  facies are considered to be the most promising source rocks potential in this basin. In this paper we present geochemical and petrographic data from outcrop samples of the Triassic carbonate Aitutu Formation, due to emphasized the organic maturation, kerogen type of the organic matter and the origin of the organic matter.  A representative of selected sample were subjected to the Rock-Eval Pyrolisis, vitrinite reflectance and thermal alteration index, bitumen extraction, were analyzed on the GC-MS. The samples were collected from marine deposit of the Triassic Sequence. The TOC values of the analyzed sample range between rich and rich organic richness (0.51% - 9.16%, wt.%, TOC), which consists mainly of type II and III kerogen and the organic matter consider to be predominantly oil/gas prone and gas prone potential. The thermal maturity assessed from Tmax, TAI, and vitrinite reflectance shows an immature to early peak mature stage of the organic matter. The GC-MS analyses of the biomarkers indicate mainly the organic matter derived from mixed source rocks facies containing alga debris and higher plant terrestrial origin.
Characteristics of the Triassic Source Rocks of the Aitutu Formation in the (West) Timor Basin Permana, Asep Kurnia; Kusworo, Aries; Prastian, Andi Heri
Indonesian Journal on Geoscience Vol 1, No 3 (2014)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.1.3.165-174

Abstract

DOI:10.17014/ijog.v1i3.192The Triassic rocks of the (West) Timor Basin have been identified that was mainly deposited in the  marine environment. The fine grained clastics and carbonate  rocks of this Triassic marine  facies are considered to be the most promising source rocks potential in this basin. In this paper we present geochemical and petrographic data from outcrop samples of the Triassic carbonate Aitutu Formation, due to emphasized the organic maturation, kerogen type of the organic matter and the origin of the organic matter.  A representative of selected sample were subjected to the Rock-Eval Pyrolisis, vitrinite reflectance and thermal alteration index, bitumen extraction, were analyzed on the GC-MS. The samples were collected from marine deposit of the Triassic Sequence. The TOC values of the analyzed sample range between rich and rich organic richness (0.51% - 9.16%, wt.%, TOC), which consists mainly of type II and III kerogen and the organic matter consider to be predominantly oil/gas prone and gas prone potential. The thermal maturity assessed from Tmax, TAI, and vitrinite reflectance shows an immature to early peak mature stage of the organic matter. The GC-MS analyses of the biomarkers indicate mainly the organic matter derived from mixed source rocks facies containing alga debris and higher plant terrestrial origin.
Co-Authors Aries Kusworo Asep Kurnia Permana Kusworo, Aries Permana, Asep Kurnia