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Study on Organic Identification of Black Shale in Bokor Formation, Kampot Province, Cambodia

Received: 1 August 2022     Accepted: 24 August 2022     Published: 16 September 2022
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Abstract

Organic petrology is the key study to identify the favorable geological condition of black shale as a hydrocarbon source rock. The study aims to identify the organic matter types in the black shale of Bokor Formation, Kampot province. Three outcrop cross-sections (Phnom Khley, Phnom Chakrey, and Phnom Monprey), which extend from the West to the East of Kampot province, were investigated for stratigraphic sequences, sedimentary structures/textures, fossil contents through fieldwork observation. Rock sampling was conducted to performed polish pellet for organic petrology. The result demonstrated that the western part consisted of repeated sequences of thin laminated shale layers interbedded with massive sandstone layers. In the eastern part, the shale layers are continually deposited as a thick bedding with fossils of syringopora, crinoid, and foraminifera, which indicates a low energy flow environment during sediment deposition. Organic petrologic analysis in shale samples revealed that alginate and bituminite were dominantly found shale samples in the Phnom Khley section, whereas macrinite and vitrinite were observed in Phnom Monprey and Phnom Chakrey, respectively. The presence of alginate, bituminite, and macrinite, suggest a potential for hydrocarbon source rock. The maceral types, such as alginite, bituminite, micrinite, and vitrinite, indicate deposition in periodically oxygenated bottom water and a sulfidic marine water environment. Based on the existing macerals and cubic pyrite that presented in the collected samples, those source rocks are suggested as thermally mature petroleum source rock.

Published in International Journal of Oil, Gas and Coal Engineering (Volume 10, Issue 4)
DOI 10.11648/j.ogce.20221004.11
Page(s) 90-96
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2022. Published by Science Publishing Group

Keywords

Organic Identification, Black Shake, Bokor Formation, Cambodia

References
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[2] Er, C., Li, Y., Zhao, J., Wang, R., & Wei, Z. (2016). Characteristics of lacustrine organic-rich shale: A case study of the Chang 7 member, Triassic Yanchang Formation, Ordos Basin, China. Journal of Natural Gas Geoscience, 1-13. doi: dx.doi.org/10.1016/j.jnggs.2016.04.001.
[3] Fishman, N. S., Hackley, P. C., Lowers, H. A., Hill, R. J., Egenhoff, S. O., Eberl, D. D., & Blum, A. E. (2012). The nature of porosity in organic-rich mudstones of the Upper Jurassic Kimmeridge Clay Formation, North Sea, offshore United Kingdom. International Journal of Coal Geology, 32-50. doi: dx.doi.org/10.1016/j.coal.2012.07.012.
[4] FYHN, M. B., LARS, S. A., LARS, O. B., PAUL, H. N., PHAN, F. G., LUONG, T. D., & FREI, T. H. (2010). Palaeocene early Eocene inversion of the Phuquoc Kampot Som Basin: SE Asian deformation associated with the suturing of Luconia. Journal of the Geological Society, 167, 281–295. doi: 10.1144/0016-76492009-039.
[5] Hongdong Wang, M. L. (2019). Intelligent Identification of Maceral Components of Coal Based on Image Segmentation and Classification. applied sciences, 9. doi: doi: 10.3390/app9163245.
[6] Hower, J. C., O'Keefe, J. M., Eble, C. F., Volk, T. J., Richardson, A. R., Satterwhite, A. B., &... & Kostova, I. J. (2011). Notes on the origin of inertinite macerals in coals: Funginite associations with cutinite and suberinite. International Journal of Coal Geology, 85 (1), 186-190.
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[8] Jahan, S., & Uddin, A. (2022). Organic petrography and depositional environments of the upper Eocene Kopili Shale, Bengal Basin, Bangladesh. Journal of Asian Earth Sciences, 17. doi: doi.org/10.1016/j.jaesx.2022.100092.
[9] Jahan, S., Ashraf, U., C, P. J., & E, S. C. (2017). Petroleum source-rock evaluation of upper Eocene Kopili Shale, Bengal Basin, Bangladesh. International Journal of Coal Geology, 71-79. doi: doi.org/10.1016/j.coal.2017.02.002.
[10] Killops, S., & Killops, V. (2005). Introduction to Organic Geochemistry. Victoria, Australia: Blackwell Science.
[11] Liu, B., Schieber, J., & Mastalerz, M. (2017). Combined SEM and reflected light petrography of organic matter in the New Albany Shale (Devonian-Mississippian) in the Illinois Basin: A perspective on organic pore development with thermal maturation. International Journal of Coal Geology, 57-72. doi: doi.org/10.1016/j.coal.2017.11.002.
[12] Mao, C., Yasuhiro, Y., & Matsuoka., T. (2014). A preliminary assessment of geological CO2 storage in Cambodia. International Journal of Greenhouse Gas Control., 19–33. doi: dx.doi.org/10.1016/j.ijggc.2014.08.016.
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[15] Ratha, H., Chanmoly, O., Chandoeun, E., & Pech, S. (2022). Depositional Environment of Black Shale in Bokor Formation, Kampot Province, Cambodia. Smart Technology for Sustainable Economic Growth (p. 4). Phnom Penh: Reasearch and Innovation Center.
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  • APA Style

    Ratha Heng, Sopheap Pech, Sreymean Sio, Chandoeun Eng, Chanmoly Or. (2022). Study on Organic Identification of Black Shale in Bokor Formation, Kampot Province, Cambodia. International Journal of Oil, Gas and Coal Engineering, 10(4), 90-96. https://doi.org/10.11648/j.ogce.20221004.11

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    ACS Style

    Ratha Heng; Sopheap Pech; Sreymean Sio; Chandoeun Eng; Chanmoly Or. Study on Organic Identification of Black Shale in Bokor Formation, Kampot Province, Cambodia. Int. J. Oil Gas Coal Eng. 2022, 10(4), 90-96. doi: 10.11648/j.ogce.20221004.11

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    AMA Style

    Ratha Heng, Sopheap Pech, Sreymean Sio, Chandoeun Eng, Chanmoly Or. Study on Organic Identification of Black Shale in Bokor Formation, Kampot Province, Cambodia. Int J Oil Gas Coal Eng. 2022;10(4):90-96. doi: 10.11648/j.ogce.20221004.11

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  • @article{10.11648/j.ogce.20221004.11,
      author = {Ratha Heng and Sopheap Pech and Sreymean Sio and Chandoeun Eng and Chanmoly Or},
      title = {Study on Organic Identification of Black Shale in Bokor Formation, Kampot Province, Cambodia},
      journal = {International Journal of Oil, Gas and Coal Engineering},
      volume = {10},
      number = {4},
      pages = {90-96},
      doi = {10.11648/j.ogce.20221004.11},
      url = {https://doi.org/10.11648/j.ogce.20221004.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20221004.11},
      abstract = {Organic petrology is the key study to identify the favorable geological condition of black shale as a hydrocarbon source rock. The study aims to identify the organic matter types in the black shale of Bokor Formation, Kampot province. Three outcrop cross-sections (Phnom Khley, Phnom Chakrey, and Phnom Monprey), which extend from the West to the East of Kampot province, were investigated for stratigraphic sequences, sedimentary structures/textures, fossil contents through fieldwork observation. Rock sampling was conducted to performed polish pellet for organic petrology. The result demonstrated that the western part consisted of repeated sequences of thin laminated shale layers interbedded with massive sandstone layers. In the eastern part, the shale layers are continually deposited as a thick bedding with fossils of syringopora, crinoid, and foraminifera, which indicates a low energy flow environment during sediment deposition. Organic petrologic analysis in shale samples revealed that alginate and bituminite were dominantly found shale samples in the Phnom Khley section, whereas macrinite and vitrinite were observed in Phnom Monprey and Phnom Chakrey, respectively. The presence of alginate, bituminite, and macrinite, suggest a potential for hydrocarbon source rock. The maceral types, such as alginite, bituminite, micrinite, and vitrinite, indicate deposition in periodically oxygenated bottom water and a sulfidic marine water environment. Based on the existing macerals and cubic pyrite that presented in the collected samples, those source rocks are suggested as thermally mature petroleum source rock.},
     year = {2022}
    }
    

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  • TY  - JOUR
    T1  - Study on Organic Identification of Black Shale in Bokor Formation, Kampot Province, Cambodia
    AU  - Ratha Heng
    AU  - Sopheap Pech
    AU  - Sreymean Sio
    AU  - Chandoeun Eng
    AU  - Chanmoly Or
    Y1  - 2022/09/16
    PY  - 2022
    N1  - https://doi.org/10.11648/j.ogce.20221004.11
    DO  - 10.11648/j.ogce.20221004.11
    T2  - International Journal of Oil, Gas and Coal Engineering
    JF  - International Journal of Oil, Gas and Coal Engineering
    JO  - International Journal of Oil, Gas and Coal Engineering
    SP  - 90
    EP  - 96
    PB  - Science Publishing Group
    SN  - 2376-7677
    UR  - https://doi.org/10.11648/j.ogce.20221004.11
    AB  - Organic petrology is the key study to identify the favorable geological condition of black shale as a hydrocarbon source rock. The study aims to identify the organic matter types in the black shale of Bokor Formation, Kampot province. Three outcrop cross-sections (Phnom Khley, Phnom Chakrey, and Phnom Monprey), which extend from the West to the East of Kampot province, were investigated for stratigraphic sequences, sedimentary structures/textures, fossil contents through fieldwork observation. Rock sampling was conducted to performed polish pellet for organic petrology. The result demonstrated that the western part consisted of repeated sequences of thin laminated shale layers interbedded with massive sandstone layers. In the eastern part, the shale layers are continually deposited as a thick bedding with fossils of syringopora, crinoid, and foraminifera, which indicates a low energy flow environment during sediment deposition. Organic petrologic analysis in shale samples revealed that alginate and bituminite were dominantly found shale samples in the Phnom Khley section, whereas macrinite and vitrinite were observed in Phnom Monprey and Phnom Chakrey, respectively. The presence of alginate, bituminite, and macrinite, suggest a potential for hydrocarbon source rock. The maceral types, such as alginite, bituminite, micrinite, and vitrinite, indicate deposition in periodically oxygenated bottom water and a sulfidic marine water environment. Based on the existing macerals and cubic pyrite that presented in the collected samples, those source rocks are suggested as thermally mature petroleum source rock.
    VL  - 10
    IS  - 4
    ER  - 

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Author Information
  • Research and Innovation Center, Institute of Technology of Cambodia, Phnom Penh, Cambodia

  • Research and Innovation Center, Institute of Technology of Cambodia, Phnom Penh, Cambodia

  • Research and Innovation Center, Institute of Technology of Cambodia, Phnom Penh, Cambodia

  • Faculty of Geo-resources and Geotechnical Engineering, Institute of Technology of Cambodia, Phnom Penh, Cambodia

  • Research and Innovation Center, Institute of Technology of Cambodia, Phnom Penh, Cambodia

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