Depositional Environment Assessment of the Middle Miocene Sedimentary Rocks in Thien Ung - Mang Cau Structure, Block 04 - 3, Nam Con Son Basin

  • Affiliations:

    1 PetroVietnam University, Ba Ria - Vung Tau, Vietnam
    2 Science Research & Engineering Institute, Ba Ria - Vung Tau, Vietnam
    3 Hanoi University of Science - VNU, Hanoi, Vietnam

  • *Corresponding:
    This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Received: 15th-Sept-2021
  • Revised: 9th-Jan-2022
  • Accepted: 1st-Feb-2022
  • Online: 28th-Feb-2022
Pages: 27 - 39
Views: 3506
Downloads: 2407
Rating: 5.0, Total rating: 239
Yours rating

Abstract:

Sediment depositional environments are one of the important scientific bases in evaluation the reservoir potential of sedimentary rocks. This article focuses on studying this issue for Middle Miocene sediments, Thien Ung - Mang Cau structure, Block 04 - 3, Nam Con Son basin. The article has integrated the methods of well log interpretation, thin section analysis and seismic attribute analysis, combined with the results of paleontological analysis of VPI - Labs to identify depositional environments of Middle Miocene sediments in the case study area. The results of interpreting well log data show that the Middle Miocene sediments were deposited in the following environments: shallow marine, shoreline, mouth bars, delta front, prodelta and lower deltaic plain. These findings are also consistent with the results of petrographic and paleontological analysis. The results of petrographic analysis show that in the study area, there are 2 main groups of sedimentary rocks, which are clastic and carbonate rocks. In the thin sections, the following components were detected: glauconite clay is characterized of marine environment, carbonate fission and siderite ore which are characteristic of deltaic environments. While paleontological samples detected organic materials, such as algae, bitumen; and fossils such as Foraminifera, Da Gai and Oc Gai - typical for shallow marine environments. The results of the seismic attribute analysis for the Middle Miocene carbonate sediments of the structure have clarified that the carbonate is concentrated in the central and eastern uplift area. This distribution tends to fewer in the west. This finding is consistent when the authors compared to well correlation in the area (wells: C - 1X, C - 2X, C - 3X and C - 4X) and also logically with the sedimentary principles.

How to Cite
Pham, N.Bao, Tran, N., Tran, D.Trung and Tran, O.Thi 2022. Depositional Environment Assessment of the Middle Miocene Sedimentary Rocks in Thien Ung - Mang Cau Structure, Block 04 - 3, Nam Con Son Basin (in Vietnamese). Journal of Mining and Earth Sciences. 63, 1 (Feb, 2022), 27-39. DOI:https://doi.org/10.46326/JMES.2022.63(1).03.
References

Radwan, A. E. (2021). Modeling the depositional environment of the sandstone reservoir in the Middle Miocene Sidri Member, Badri Field, Gulf of Suez Basin, Egypt: Integration of gamma-ray log patterns and petrographic characteristics of lithology. Natural Resources Research, 30(1), 431-449.

Cant, D. (1992). Subsurface Facies Analysis. In R. G. Walker (Ed), Facies models. response to sea level changes. St. John’s: Geological Association of Canada, 27-45.

Chow, J. J., Ming-Chung, L., and Fuh, S. C. (2005). Geophysical well log study on the paleoenvironment of the hydrocarbon producing zones in the Erchungchi Formation, Hsinyin, SW Taiwan. TAO: Terrestrial, Atmospheric and Oceanic Sciences, 16(3), 531.

Mai, T. T. (2011). Seismic exploration. Transport Publishing House, Ha Noi. (in Vietnamese)

Nguyen, H. (2005). Geological and oil and gas resources in Vietnam. Chapter 10 - Nam Con Son sedimentary basin and oil and gas potentials. Science and Technology Publishing House. (in Vietnamese)

Serra, O.  (eds.). (1989). Sedimentary Environments from wireline logs. Schlumberger Educational Services.

Pham, B.N. (2019). Research on the evolution of the sedimentary environment and petroleum significance of the middle Miocene sediments in the central area of the Nam Con Son basin. Ph.D. Thesis, Petrovietnam. (in Vietnamese) 

Selley, R. C. (1978). Concepts and methods of subsurface facies analysis. American Associatetion of Petroleum Geologists Contin Educ Course Notes Ser. 9, 82.

Petrovietnam, (2005). Biostratigraphic wells 04.3 - TU - 1X, Nam Con Son basin, the continental shelf of Vietnam. (in Vietnamese) 

Petrovietnam, (2006). Biostratigraphic wells 04.3 - TU - 2X, Nam Con Son basin, the continental shelf of Vietnam. (in Vietnamese) 

Vietsovpetro, (2011). Accuracy of oil and gas reserves of Thien Ung - Mang Cau field at the time of 01.05.2009. (in Vietnamese)