KARAKTERISTIK OIL SHALE DI KAWASAN BUKIT SUSAH, RIAU
Oil shale, as an alternative energy resource, is recognized in the Eocene - Oligocene Kelesa Formation, located in the
Bukit Susah area, within the Central Sumatera Basin, of the back-arc type. An almost complete rock sequence of the
86.8 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 Â within Â 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
Burley, S. D., Kantorowicz, J.D., and Waugh, B., 1987. Clastic Diagenesis. Dalam : Edward, A.B., dan Foster, N.H.(Ed), Reservoir II Sandstone. American Association of Petroleum Geology. Treatise of Petroleum Geology Reprint Series: 408-455.
Clarke, M.C.G., 1982, Notes on a Geological traverse from Padang to Medan, Sumatra. Unpublished Report, NSFP Rep. Ser. 4, 4/83. Directorate of Mineral Resources, Bandung, Indonesia.
Demaison, G.J., and Moore, G.T, 1980. Anoxic environment and source oil genesis. Organic Geochemistry 2: 9-
Heryanto, R. dan Hermiyanto, H., 2006, Potensi Batuan Sumber (Source Rock) Hidrokarbon di
Pegunungan Tigapuluh, Sumatera Tengah. Jurnal Geologi Indonesia 1( 1): 37-48.
Leythaeuser, D and Welte, D.H., 1980. Relation between distribution of heavy n-paraffins and coalification in
Carboniferous coal from the Saar District, Germany. Pergamon, Oxford: 429 - 442.
Schmidt, V. and McDonald, D.A., 1979. The rocks of secondary in the course of sandstone diagenesis. Society of Economic Paleontology, Mineralogy, Special Publication 26: 175-207.
Susanto, E., Suwarna, N. dan Hermiyanto, H., 2004. Penelitian Fosil Fuel dan Paleontologi, Kajian Oil shale, di Sumatera Bagian Tengah. Laporan Internal, Pusat Penelitian dan Pengembangan Geologi, Bandung.
Suwarna, N., Budhitrisna, T., Santosa, S., dan Mangga, S.A., 1994. Peta Geologi Lembar Rengat skala
:250.000. Pusat Penelitian dan Pengembangan Geologi, Bandung.
Authors who publish articles inÂ Jurnal Geologi dan Sumberdaya Mineral (JGSM.Geologi) agree to the following terms:
- Authors retain copyright of the article and grant the journal right of first publication with the work simultaneously licensed under aÂ CC-BY-NC or The Creative Commons Attributionâ€“ShareAlike License.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access)