Fault seal analysis for VS area, block 16 -1/15, Cuu Long Basin, Viet Nam

  • Affiliations:

    1 PVEP-ITC, Hanoi, Vietnam
    2 Vietsopetro, Baria - Vungtau, Vietnam
    3 East Sea Stars, Hochiminh City, Vietnam

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  • Received: 2nd-Apr-2023
  • Revised: 29th-July-2023
  • Accepted: 17th-Aug-2023
  • Online: 31st-Aug-2023
Pages: 60 - 68
Views: 1002
Downloads: 11
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Fault-bound traps represent an important class of hydrocarbon-bearing structure. Whether a fault can seal hydrocarbons on a geological timescale may be controlled by one or more of three conditions: (1) sealing due to lithological juxtaposition, where reservoir rock is juxtaposed against sealing rock across the fault; (2) sealing by the fault damage zone, which forms a barrier composed of low-permeability clay within the fault zone and (3) the tectonic activity of the fault, as during faulting, hydrocarbon accumulations can be destroyed and leakage along the fault zone. This research employs an indirect method to establish a correlation between pressure and the sealing properties on fault surfaces, such as the SGR (Shale Gouge Ratio), across various formations under the same geological conditions from all fields within the region and around the world. This aids in assessing the sealing potential of the faults. Evaluate the fault seal capacity according to 3D model for the structures in Oligocene D, Oligocene C and Lower Miocene sediments to serve the assessment hydrocarbon potential in VS area and reduce the risk for further exploration - appraisal work in block 16-1/15, Cuu Long basin. Geology, seismic and petrophysical data were used to construct 3D structural frameworks, lithology model and Vclay model. Parameters such as fault throw, Vshale, lithology, bed thickness, burial depth history, fluid density and pressures, ect. are incorporated into fault seal analysis and also estimate the maximum hydrocarbon column height can be held by each fault in study area, therefore helping to assess the hydrocarbon potential in undrilled structures in VS area.

How to Cite
Nguyen, H.Viet, Pham, S.Xuan, Nguyen, T.Minh, Doan, Q.Dinh, Nguyen, T.Van and Lai, L.Quoc 2023. Fault seal analysis for VS area, block 16 -1/15, Cuu Long Basin, Viet Nam (in Vietnamese). Journal of Mining and Earth Sciences. 64, 4 (Aug, 2023), 60-68. DOI:https://doi.org/10.46326/JMES.2023.64(4).07.

Bojesen-Koefoed, J. A., Nytoft, H. P., and Dau, N. T. (2009). Petroleum composition in the Cuu Long basin (Mekong basin) offshore southern Vietnam. Marine and Petroleum Geology, 26(6), 899-908.

Bretan, P., Yeilding, G., Jones, H., (2003). Using calibrated shale gouge ratio to estimate hydrocarbon column heights. AAPG Bullentin 87(3). 397-413.

Dam, M. H., and Quang, C. D. (2015). Sequence stratigraphy and determination of Early Miocene-Oligocene sedimentation environment of block 09-3 in Cuu Long basin based on the characteristic of freshwater dinocyst group and palynofacies analysis. Petro Vietnam(7), 24-32.

Fulljames J. R., Zijerveld L. J. J., Franssen R. C. M. W. (1997). Fault seal processes: systematic analysis of fault seals over geological and production time scales. Norwegian Petroleum Society, Special Publications, (Vol. 7, pp. 51-59). Elsevier.

Lindsay, N. G., Murphy, F. C., Walsh, J. J., and Watterson, J., (1992). Outcrop studies of shale smears on fault surface. The geological modelling of hydrocarbon reservoirs and outcrop analogues, 113-123.

Nguyễn, H. (2007). Địa chất và tài nguyên dầu khí Việt Nam. Nhà xuất bản Khoa học Kỹ thuật.

Schmidt, W. J., Hoang, B. H., Handschy, J. W., Hai, V. T., Cuong, T. X., and Tung, N. T. (2019). Tectonic evolution and regional setting of the Cuu Long Basin, Vietnam. Tectonophysics, 757, 36-57.

Yielding, G., Bretan, P., and Freeman, B., (2010). Fault seal calibration: a brief review. Geological Society, London, Special Publications, 347(1), 243-255.

Yielding, G., (2015). Trapping of buoyant fluids in fault-bound structures. Geological Society, London, Special Publications 421(1). 29-39.