Fault seal capacity evaluation in block 04-3 of Nam Con Son basin, offshore Vietnam

  • Bui Huy Hoang
  • Nguyen Thanh Lam
  • Phung Van Phong
  • Nguyen Tuan Anh
  • Pham Xuan Son
  • Vu Tuan Anh
  • Nguyen Lam Anh
  • Pham Viet Au
  • Nguyen Van Thang
Keywords: Fault seal analysis, prospect, Shale Gouge Ratio (SGR), Clay Smear Potential (CSP), gas column height, hydrocarbon column height, hydrocarbon density, threshold pressure, spill-point


The purpose of the study is to evaluate the fault seal capacity and hydrocarbon (HC) retention potential of the Miocene -Oligocene fault-bounded structures in Block 04-3, Nam Con Son basin, offshore southern Viet Nam. Seismic and well petrophysical interpretation data are used to build 3D fault model and stratigraphic model within the 6 selected structures. Parameters such as fault throw, bed thickness, Vshale, lithology, burial depth, and fluid density are incorporated into fault seal evaluation. The critical leak points at the Middle Miocene, Lower Miocene and Oligocene intervals on faults bounding the 6 structures are defined. Hydrocarbon column heights supported by the faults can be estimated using the empirical relationship between Shale Gouge Ratio and threshold pressure. The study predicts that the maximum gas column ranges from 136m to 252m in Middle-Lower Miocene reservoirs in the drilled structures and from 119m to 295m in Middle-Lower Miocene and Oligocene reservoirs in the undrilled structures.



L.V.Hien. Structural characteristics and petroleum potential of synrift targets in the Nam Con Son Basin. VPI. 2012.

VSP. G&G, RE and Final well reports. 2002 - 2014.

Brown, Alton. Capillary effects on fault - fill sealing. AAPG Bulletin. doi:10.1306/08010201127. 2003; 87 (3): p. 381 - 395.

Al-Busafi, Bader. Incorporation of fault rock properties into production simulation models.

http://etheses.whiterose.ac.uk/190/. 2005.

Richard M.Jones, and Richard R.Hillis. An integrated, quantitative approach to assessing fault – seal risk. AAPG Bulletin. doi:10.1306/10100201135. 2003; 87 (3): p. 507 - 524.

G.Yielding, B.Freeman and D.T.Needham. Quantitative fault seal prediction. AAPG Bulletin.

doi:10.1306/522B498D - 1727 - 11D7 - 8645000102C1865D. 1997; 81(6): p. 897 - 917.

N.G.Lindsay, F.C.Murphy, J.J.Walsh and J.Watterson. Outcrop studies of shale smears on fault surfaces. The geological modelling of hydrocarbon reservoirs and outcrop analogues. doi:10.1002/9781444303957.ch6. 1992. 15: p. 113 - 123.

J.D.Bouvier, C.H.Kaars-Sijpesteijn, D.F.Kluesner, C.C.Onyejekwe, and R.C.Van Der Pal. Three – Dimensional seismic interpretation and fault sealing investigations, Nun River Field, Nigeria. AAPG Bulletin. 1989; 73(11): p. 1397 - 1414.

Susanne Sperrevik, Paul A Gillespie, Quentin J.Fisher, Trond Halvorsen, and Rob J.Knipe. Empirical

estimation of fault rock properties. Norwegian Petroleum Society Special Publications. doi:10.1016/S0928 - 8937(02)80010 - 8. 2002; 11: p. 109 - 125.

Q.J.Fisher, and R.J.Knipe. Fault sealing processes in siliciclastic sediments. Geological Society, London, Special Publications. 1998. 147 (1): p. 117 - 134.

Bretan, Peter, Graham Yielding, and Helen Jones. Using calibrated shale gouge ratio to estimate hydrocarbon column heights. AAPG Bulletin. doi:10.1306/08010201128. 2003; 87 (3): p. 397 - 413.

PVN. G&G, RE and Final well reports. 1979 - 2001.

How to Cite
Hoang, B. H., Lam, N. T., Phong, P. V., Anh, N. T., Son, P. X., Anh, V. T., Anh, N. L., Au, P. V., & Thang, N. V. (2016). Fault seal capacity evaluation in block 04-3 of Nam Con Son basin, offshore Vietnam. Petrovietnam Journal, 6, 8-14. Retrieved from http://pvj.com.vn/index.php/TCDK/article/view/520

Most read articles by the same author(s)