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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Muhammad Heri Hermiyanto, Muhammad Heri
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Education Energy Engineering Environmental Science

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KARAKTERISTIK OIL SHALE DI KAWASAN BUKIT SUSAH, RIAU Hermiyanto, Muhammad Heri; Panggabean, Hermes
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 1 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Oil shale, as an alternative energy resource, is recognized in the Eocene - Oligocene Kelesa Formation, located in theBukit Susah area, within the Central Sumatera Basin, of the back-arc type. An almost complete rock sequence of the86.8 m thick part of oil shale-bearing formation, found in the Puti Kayu River, comprises an association of shale with carbonaceous siltstone, sandstone, conglomeratic sandstone, and conglomerate. The thickness of shale bed is approximately 27.90 meter. Oil shale in the study area is potential as an oil-gas prone source rock, within good to excellent category, containing Kerogen Types I and II.. The dominant maceral group is exinite, composed of alginite (0.4- 0.6 %), resinite (0.4 - 2.0 %), sporinite (0.4 - 0.8 %), suberinite (0.4 - 2 %), cutinite (0.6 - 1.4 %), and exsudatinite (0.2 - 0.6 %); whilst the minor one is vitrinite ranging from 0.6 - 7.6 %. The average value of vitrinite reflectance varies from 0.27 to 0.43 %. Thermal maturity level of the oil shale, in general, is situated  within  the immature category, although it tends to be close to the immature - mature boundary line, beyond oil birth line. Clay minerals consist of smectite-illite assosiation, with illite and kaolinite. The shale has undergone a diagenetic process within an early diagenetic level. A palynological study shows that the age of the oil shale in Bukit Susah is Middle to Late Eocene. Keywords: oil shale, alternative energy, Eocene-Oligocene , Bukit Susah, oil-gas prone
COALBED METHANE POTENTIAL AND COAL CHARACTERISTICS IN MUARA LAKITAN AREA, SOUTH SUMATRA Hermiyanto, Muhammad Heri; Setiawan, R.
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 3 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

A research on Coal Bed Methane (CBM) of the Muaraenim Formation has been conducted in the Muara Lakitan area. Megascopically, the coal lithotype varies from dull to bright banded, with black – brownish black and brownish to black streaks, brittle – friable, dull-greasy luster, even-uneven, dirty on fingers, with resin patch and striation, dirt bands (clay/mud layers), pyrite striation, and pore structures. The coal quality, gained from geochemical analysis, indicates that its ash content ranges between 1.22% and 2.47%, total sulphur content is from 0.15% to 0.3 %, and the volatile matter of 38.02% - 40.81%. The coal is dominated by vitrinite (73.6 – 85.8 %), with minor amount of exinite (1.4 – 4.0 %), inertinite (4.2 – 21 % ) and mineral matter (2.4 – 8.2 %). Vitrinite reflectance, varies from 0.44% to 0.45 %, tends to indicate a sub-bituminous to high volatile bituminous-A coal rank. Kaolinite clays are the most prominent mineral matter within all coal samples analyzed, although the clay textures show irregular shapes. Iron oxides are also present in several samples. Microcleats found within the coals are mostly open, and are rarely filled by clay minerals. Based on Barbara/Winter diagram, the methane gas content in the studied area ranges from 0.57 m3/t – 1.70 m3/t = 20.44 scf/t – 60.96 scf/t. The total reserve of gas within six coal seams in the studied area is 15.524,28 scf.Keywords : Coal Bed Methane (CBM), Muaraenim Formation, Muara Lakitan
Co-Authors Hermes Panggabean R. Setiawan