3-D predrill overpressure prediction using prestack depth-migrated seismic velocity in a field of southwestern Malay Basin

详细信息    查看全文

• 作者：Iftikhar Ahmed Satti ; Deva Ghosh ; Wan Ismail Wan Yusoff
• 关键词：Overpressure ; Interval velocity ; Anisotropy ; Depth migration ; Prediction
• 刊名：Arabian Journal of Geosciences
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：8
• 期：9
• 页码：7387-7398
• 全文大小：6,464 KB
• 参考文献：Bowers G (1995) Pore pressure estimation from velocity data: accounting for overpressure mechanisms besides undercompaction. SPE Drill Complet 10(2):89-5CrossRef
  Bowers GL (2002) Detecting high overpressure. Lead Edge 21(2):174-77CrossRef
  Chopra S, Huffman AR (2006) Velocity determination for pore-pressure prediction. Lead Edge 25(12):1502-515CrossRef
  Deming D, Cranganu C, Lee Y (2002) Self-sealing in sedimentary basins. J Geophys Res 107(B12):2329CrossRef
  Dutta N (2002) Deepwater geohazard prediction using prestack inversion of large offset P-wave data and rock model. Lead Edge 21(2):193-98CrossRef
  Eaton B (1972) The effect of overburden stress on geopressure prediction from well logs. J Pet Technol 24(8):929-34CrossRef
  Ebdale P, Redfern J (1997) Malaysia open area data review. (Unpublished): 230
  Gardner G, Gardner L, Gregory A (1974) Formation velocity and density-the diagnostic basics for stratigraphic traps. Geophysics 39(6):770-80CrossRef
  Ghosh D, Halim MFA, Brewer M, Viratno B, Darman N (2010) Geophysical issues and challenges in Malay and adjacent basins from an E & P perspective. Lead Edge 29(4):436-49CrossRef
  Hoesni MJ (2004) Origins of overpressure in the Malay Basin and its influence on petroleum systems. University of Durham
  Hoesni MJ, Swarbrick R, Goulty N (2003) Origin of overpressure in the Malay Basin. 2003 AAPG International Conference & Exhibition Technical Program
  Koch P, Aznan A, Mcallister N (1994) EPIC pressure analysis portfolio. Unpublished, Esso Production Malaysia. Inc
  O’Connor S, Swarbrick R, Hoesni J, Lahann R (2012) Deep pore pressure prediction in challenging areas, Malay Basin, Se Asia
  Pennebaker E (1968) Seismic data indicate depth, magnitude of abnormal pressure. World Oil 166(7):73-8
  Satti IA, Ghosh D, Yusoff WIW (2013) Heat flow analysis in a high pore pressure field of South-western Malay Basin. International Oil and Gas Symposium and Exhibition
  Satti IA, Ghosh DP, Hoesni MJ, Yusoff WIW (2014) Analysis of overpressure mechanisms in a field of southwestern Malay Basin. Offshore Technology Conference-Asia, Offshore Technology Conference
  Sayers CM, den Boer LD, Nagy ZR, Hooyman PJ (2006) Well-constrained seismic estimation of pore pressure with uncertainty. Lead Edge 25(12):1524-526CrossRef
  Shariff BKM, Leslie W (1995) Occurrence, origin and implications of overpressure in the Malay and Penyu basins, offshore Malaysia. Bull Geol Soc Malaysia 37:191-04
  Swarbrick RE (2001) Challenges of porosity based pore pressure prediction. 63rd EAGE Conference & Exhibition
  Terzaghi K, Peck RB (1948) Soil Mechanics in Engineering Practice, John Wiley & Sons Inc, New York
  Tingay MR, Hillis RR, Swarbrick RE, Morley CK, Damit AR (2009) Origin of overpressure and pore-pressure prediction in the Baram province, Brunei. AAPG Bull 93(1):51-4CrossRef
  Tjia HD, Liew KK (1996) Changes in tectonic stress field in northern SundaShelf basins, In: Hall R, Blundell DJ (eds) Tectonic evolution of Southeast Asia, Geological Society, London, Special Publication 291-06
  Yusoff WIW (2011) Heat flow anomaly associated with overpressures and reservoir compartments in the Central Malay Basin, Malaysia. AAPG/SPE/SEG HEDBERG CONFERENCE
  
• 作者单位：Iftikhar Ahmed Satti (1)
  Deva Ghosh (1)
  Wan Ismail Wan Yusoff (1)
  
  1. Department of Geosciences, Universiti Teknologi PETRONAS, Perak, Malaysia
  
• 刊物类别：Earth and Environmental Science
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-7538

文摘

Quantitative predrill pore pressure prediction is very important for reducing the drilling hazards. In many Tertiary basins, generation of overpressure is mainly by compaction disequilibrium due to high deposition rate and low permeability in shale. In the Malay Basin, high geothermal gradient (i.e., 40-0 °C/km) and high heat flow also play an important role in generating overpressure at shallow depth. This study describes the utilization of 3-D prestack depth-migrated seismic interval velocity for predrill pore pressure prediction in a field of southwestern Malay Basin. The quality of 3-D prestack depth-migrated seismic interval velocity was enhanced by calibration with check-shot data. Modified Gardner’s equation was used to generate the 3-D density cube from the interval velocity. The Eaton and Bowers methods were used to compute and predict pore pressure values from the seismic velocity. The Eaton method with standard exponent for seismic velocity gave good prediction in the shallower zone where overpressure is caused by undercompaction mechanism, whereas underpredicted the high pore pressure at the greater depth where fluid expansion is the cause of overpressure. However, the overpressures were predicted quite well by applying correction on the Eaton method for fluid expansion mechanism. Keywords Overpressure Interval velocity Anisotropy Depth migration Prediction