Pre-drill pore pressure prediction using seismic interval velocity and wireline log: Case studies for some wells in Cuu Long and Song Hong basins

  • Nguyen Van Hoang PetroVietnam Exploration Production Corporation
  • Pham Quy Ngoc Vietnam Petroleum Institute
  • Nguyen Minh Quy Vietnam Petroleum Institute
  • Doan Huy Hien Vietnam Petroleum Institute
Keywords: Abnormal pressure, Eaton method, Cuu Long basin, Song Hong basin

Abstract

Pore pressure can be obtained from seismic interval velocity by the velocity to pore pressure transform technique. In this paper, the authors present the Eaton experimental method to calculate pore pressure for some wellbores in the Cuu Long and Song Hong basins, where complex processes of subsidence, burial, geological transformation, and geothermal activity took place, causing abnormal pressure zones.
The obtained results show that the pore pressures calculated from the seismic interval velocity data are closely correlated with the values measured by well logging methods and the density of the drilling fluids. Therefore, using seismic interval velocities to calculate pore pressure values, identify and predict abnormal zones by the Eaton method can be effectively applied in frontier areas to improve safety, reduce risks while drilling.

References

Ben A. Eaton, “The equation for geopressure prediction from well logs”, Fall Meeting of the Society of Petroleum Engineers of AIME, Dallas, Texas, 28 September - 1 October 1975. DOI: 10.2118/5544-MS.

L.Bowers, “Pore pressure estimation from velocity data: Accounting for overpressure machnisms besides undercompaction”, SPE Drilling & Completion, Vol. 10, No. 2, pp. 89 - 95, 1995. DOI: 10.2118/27488-PA.

PVEP, “Block 09/2 Cuu Long basin, Ca Ngu Vang field geopressure study”, Technical report, 2008.

W.H. Fertl, R.F. Chapman, and R.F. Hotz, Studies in abnormal pressure. Elsevier, 1994.

M. King Hubbert and William W. Rubey, “Role of fluid pressure in mechanics of overthrust faulting”, Geological Society of America Bulletin, Vol. 70, No. 2, pp. 115 - 166, 1959. DOI: 10.1130/0016-7606(1959)70[115:ROFPIM]2.0.CO;2.

Tuy Le Giang, “A study on geopressure for a site in the eastern part of Block 15-2/01 Cuu Long basin, Vietnam”, Master Thesis, Asian Institute of Technology, Thailand, 2012.

Alan R. Huffman, “The future of pressure prediction using geophysical methods”, Pressure regimes in sedimentary basins and their prediction. AAPG Memoir, 2002.

C.M. Sayers, G.M. Johnson, and G. Denyer, “Predrill pore pressure prediction using seismic data”, Geophysics, Vol. 67, No. 4, pp. 1286 - 1292, 2002. DOI: 10.1190/1.1500391.

Patrizia Cibin, Luigi Pizzaferri, and Mauro Della Martera, “Seismic velocities for pore prediction. Some cases histories”, Proceedings of the 7th International Conference and Exposition on Petroleum Geophysics, 14 - 16 January 2008.

Satinder Chopra and Alan Huffman, “Velocity determination for pore pressure prediction”, CSEG Recorder, 2006.

G.H.F. Gardner, L.W. Gardner, and A.R. Gregory, “Formation velocity and density - The diagnostic basics for stratigraphic traps”, Geophysics, Vol. 39, No. 6, pp. 770 - 780, 1974. DOI: 10.1190/1.1440465.

Dave Hawker, Abnormal formation pressure analysis. Datalog, 2001.

Lê Vũ Quân, Nguyễn Minh Quý, Nguyễn Văn Đô, và Nguyễn Văn Khương, “Các phức tạp địa chất ảnh hưởng đến công tác khoan ở bể Nam Côn Sơn”, Tạp chí Dầu khí, Số 5, trang 31 - 36, 2012.

Nguyễn Đương Trung, Trần Như Huy và Nguyễn Quốc Quân, “Dự báo chất lượng đá chứa tầng Miocene trung của một số cấu tạo phía Bắc Bể sông Hồng”, Tạp chí Dầu khí, Số 4, trang 12 -16, 2013.

Published
2022-09-14
How to Cite
Nguyen , V. H., Pham, Q. N., Nguyen , M. Q., & Doan , H. H. (2022). Pre-drill pore pressure prediction using seismic interval velocity and wireline log: Case studies for some wells in Cuu Long and Song Hong basins. Petrovietnam Journal, 8, 05 - 12. https://doi.org/10.47800/PVJ.2022.08-01
Section
Articles

Most read articles by the same author(s)