Preliminary results of petroleum source rock evaluation of Mongolian Mesozoic oil shales
Keywords:
Jurassic oil shale, Mesozoic source rock, Rock-EvalAbstract
Jurassic and Cretaceous oil shale samples, collected from northern and central Mongolian basins, have been analyzed to determine their petroleum source rock potential. The contents of total organic carbon (TOC) and total sulfur, and source rock screening data were obtained by Rock-Eval pyrolysis. Cretaceous oil shales contain up to 17.4 wt.% TOC and Hydrogen Index (HI) values range from 638-957 mg HC/g TOC. Jurassic oil shale samples have similar TOC contents, ranging from 10.7 to 17.3 wt.%. HI values of Jurassic Tsagaan-Ovoo oil shale vary between 270-313 mg HC/g TOC. Average Tmax values of Cretaceous and Jurassic samples are 4370C and 4230C, respectively. This observed data indicates that both Jurassic and Cretaceous oil shales are excellent source rock. Cretaceous oil shales contain type I kerogen (highly oil prone), while Jurassic Tsagaan-Ovoo oil shale has mixed type II/III kerogen (mixed oil and gas prone). Based on Tmax and Production Index values, both Jurassic and Cretaceous oil shales are immature. Overall, the result of this study contributes organic geochemistry database of Mongolian oil shale and encourages source rock potential of both Jurassic and Cretaceous oil shale.
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Bat-Erdene, D. 2009. Mongolian oil shale basins and deposits. In: Byamba, J. (Ed.), Fossil Fuel - Mongolian Geology and Mineral Resources: Memorial volumes to 70th year anniversary for Mongolian Geological Survey, Vol. 5, pp.178–271. [in Mongolian]
Bat-Erdene and Jargal, 1994. Mongolian oil shale and its potential. Ministry of Energy and Mining, ‘Mongol Gazriin tos tovchoo’, Open file report. Ulaanbaatar [in Mongolian].
Behar, F., Beaumont, V., de Penteado, H.L., 2001. Rock-Eval 6 technology: Performances and developments. Oil and Gas Science and Technology 56, 111-134.
Berner, R., Raiswell, R., 1983, Burial of organic carbon and pyrite sulfur in sediments over Phanerozoic time: a new theory. Geochimica et Cosmochimica Acta 47, 855-862.
Diessel,1992 Diessel, C.F.K., 1992. Coal-bearing Depositional Systems. Springer-Verlag, Berlin, pp.571–581.
Erdenetsogt and Jargal, 2014. Erdenetsogt, B., Jargal, L., 2014. Fossil fuels hosted in Mesozoic sequences of Mongolia. Proceeding of 2nd International Symposium of IGCP Project 608, pp.135-138.
Erdenetsogt et al., 2009 Erdenetsogt, B., Lee, I., Bat-Erdene. D, Jargal, L., 2009. Mongolian coal-bearing basins: Geological settings, coal characteristics, distribution, and resources. International Journal of Coal Geology 80, 87-104.
Espitalie, J., 1986. Use of Tmax as a maturation index for different types of organic matter: Comparison with vitrinite reflectance. In: Burrus, J. (Ed.), Thermal Modelling in Sedimentary Basins. Technip, Paris, pp.475-496.
Graham et al., 2001. Graham, S.A., Hendrix, M.S., Johnson, C.L., Badamgarav,D., Badarch, G., Amory, J., Porter,M., Barsbold, R., Webb, L.E., Hacker, B.R., 2001. Sedimentary record and tectonic implications of Mesozoic rifting in Southeast Mongolia. Geological Society of America Bulletin 113, 1560–1579.
Hendrix et al., 1996, Hendrix, M.S., Beck, M.A., Badarch, G., Graham, S.A., 2001. Triassic synorogenic sedimentation in southern Mongolia; early effects of intracontinental deformation. In: Hendrix, M.S., Davis, G.A. (Eds.), Paleozoic and Mesozoic Tectonic Evolution of Central Asia — From Continental Assembly to Intracontinental Deformation: Geological Society of America Memoir, vol. 194, pp. 389–412.
Hasegawa, H., Ando, H., Ohta, T., Hasegawa, T., Yamamoto, M., Hasebe, N., Murata, T., Shinya, H., Li, G., Ichinnorov, N., Erdenetsogt, B., Heimhofer, U., 2014. Reconstruction of terrestrial paleo-hydrological change during the mid-Cretaceous “Supergreenhouse” period: Insights from the lacustrine records (Shinekhudag Fm.) of southeast Mongolia. Proceeding of 2nd International Symposium of IGCP Project 608, pp.77-78.
Johnson et al., (2003). Johnson, C.L., Greene, T.J., Zinniker, D.A., Moldowan, J.M., Hendrix, M.S., Carroll, A.R.,
Geochemical characteristics and correlation of oil and nonmarine source rocks from Mongolia. AAPG Bulletin 87, 817–846.
Johnson, 2004 Johnson, C.L., 2004. Polyphase evolution of the East Gobi basin: sedimentary and structural records of Mesozoic–Cenozoic intraplate deformation in Mongolia. Basin Research 16, 79–99.
Klemme, H.D., 1994. Petroleum systems of the World involving Upper Jurassic source rocks. In: Magoon,L.B., Dow, W.G. (Eds.), The Petroleum System - From Source to Trap: AAPG Memoir, Vol. 60, pp.51-72.
Lafargue, E., Marquis, F., Pillot, D., 1998.Rock-Eval 6 applications in hydrocarbon exploration, production and soil contamination studies. Oil and gas science and technology 53, 421-437
Langford, F.F., Blanc-Valleron, M.M., 1990. Interpreting Rock-Eval pyrolysis data using graphs of Pyrolizable hydrocarbons vs. Total organic carbon. AAPG Bulletin 74, 799-804.
Lamb et al., 2008, Lamb, M.A., Badarch, G., Navratil, T., Poier, R., 2008. Structural and geochronologic data from the Shin Jinst area, eastern Gobi Altai, Mongolia: Implications for Phanerozoic intracontinental deformation in Asia. Tectonophysics 451, 312–330.
Li, G., Ando, H., Hasegawa, H., Yamamoto, M., Hasegawa, T., Ohta, T., Hasebe, N., Ichinnorov , N., 2014. Confirmation of a Middle Jurassic age for the Eedemt Formation in Dundgobi Province, southeast Mongolia: constraints from the discovery of new spinicaudatans (clam shrimps), Alcheringa 38, 305-316.
McCarthy, K., Rojas, K., Niemann, M., Palmowski, D., Peters, K., Stankiewicz, A., 2011. Basic Petroleum Geochemistry for Source Rock Evaluation. Oilfield Review, 23, 32–43.
Peters, K.E., 1986. Guidelines for evaluating petroleum source rocks using programmed pyrolysis. AAPG Bull., 70, 329
Peters, K.E., Cassa, M.R., 1994. Applied source rock geochemistry. In: Magoon,L.B., Dow, W.G. (Eds.), The Petroleum System - From Source to Trap: AAPG Memoir, Vol. 60, pp.93–120.
Pentilla, 1994 Pentilla, W.C., 1993. The recoverable oil and gas resources of Mongolia. Journal of Petroleum Geology 17, 89–98.
Sykes, R. and Snowdon, L.R. (2002) Guidelines for Assessing the Petroleum Potential of Coaly Source Rocks Using Rock-Eval Pyrolysis. Organic Geochemistry 33, 1441-1455.
Tissot, B. P., B. Durand, J. Espitalie, and A. Combaz, 1974. Influence of the nature and diagenesis of organic matter in formation of petroleum. AAPG Bulletin 58, 499-506.
Tissot, B. P., and D. H. Welte, 1984. Petroleum formation and occurrence. New York, Springer-Verlag, pp.699.
Sladen, C., Traynor, J.J., 2000. Lakes during the evolution of Mongolia. In: Gierlowski-Kordesch, E.H. and Kelts, K.P. (Eds.), Lake basin through space and time: AAPG Studies in Geology 46, pp. 35-57.
Watson, M.P., Hayward, A.B., Parkinson, D.N., Zhang, Z.M., 1987. Plate tectonic history, basin development and petroleum source rock deposition onshore China. Marine and Petroleum Geology 4, 205–225.
Yamamoto, M., Bat-Erdene, D., Ulziihutag, P., Enomoto, M., Kajiwara, Y., Takeda, N., Suzuki, Y., Watanabe, Y., Nakajima, T., 1993. Preliminary report on geochemistry of Lower Cretaceous Dsunbayan oil shales, eastern Mongolia. Geological Survey of Japan Bulletin 44, 685–691.
Yamamoto, M., Bat-Erdene, D., Ulziihutag, P., Watanabe, Y., Imai, N., Kajiwara, Y., Takeda, N., Nakajima, T., 1998. Organic geochemistry and palynology of Lower cretaceous Zuunbayan oil shales, Mongolia. Geological Survey of Japan Bulletin 49, 257–274.
Zorin, Yu.A., 1999. Geodynamics of the western part of the Mongolia–Okhotsk collisional belt, Trans-Baikal region (Russia) and Mongolia. Tectonophysics 306, 33–56.
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