1887
Volume 31, Issue 3
  • ISSN: 1354-0793
  • E-ISSN:

Abstract

The Sequoia Pliocene channel reservoirs within the West Delta Deep Marine (WDDM) concession, located offshore of the Nile Delta, pose significant challenges due to their complex stratigraphy and variable reservoir properties. This study employs an integrated approach, combining seismic data interpretation with comprehensive petrophysical analysis, to characterize these reservoirs and assess their hydrocarbon potential. Seismic data interpretation revealed a complex depositional environment, characterized by an upward-fining sequence of sandstones and mudstones. High seismic amplitudes were associated with gas sands, while lower amplitudes indicated background shale. The seismic stratigraphy indicates that the Sequoia channel system evolved from an initial high-energy erosional phase to a more subdued depositional environment, leading to significant heterogeneity in the reservoir quality. Petrophysical analysis demonstrated that effective porosity values within the reservoir range from 18 to 30%, with water-saturation levels of between 38 and 68%, reflecting the variability in reservoir properties across different zones. The calculated gas initially in place (GIIP) for the Sequoia channel ranges from 724.1 to 4158.71 Bcf, highlighting the substantial hydrocarbon potential within this complex system. This study underscores the importance of integrating seismic and petrophysical data to develop a comprehensive understanding of the Sequoia channel reservoirs. The results provide a robust framework for optimizing field development strategies, which is crucial for maximizing hydrocarbon recovery. The findings also offer valuable insights into the geological complexities of the WDDM concession, serving as a reference for future exploration and production efforts in similar deep-water environments.

© 2025 The Author(s). Published by The Geological Society of London for GSL and EAGE. All rights, including for text and data mining (TDM), artificial intelligence (AI) training, and similar technologies, are reserved. For permissions: https://www.lyellcollection.org/publishing-hub/permissions-policy. Publishing disclaimer: https://www.lyellcollection.org/publishing-hub/publishing-ethics

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2026-02-15

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References

  1. Abd-Allah, A.M., Aal, M.H.A. and Ghandour, A.2012. Structural characteristics and tectonic evolution of the northwestern margin of the Nile Delta, Egypt. Journal of African Earth Sciences, 68, 82–95, doi: 10.1016/j.jafrearsci.2012.02.00610.1016/j.jafrearsci.2012.02.006
     https://doi.org/10.1016/j.jafrearsci.2012.02.006 [Google Scholar]
  2. Abdel Aal, A., El Barkooky, A., Gerrits, M., Meyer, H., Schwander, M. and Zaki, H.2000. Tectonic evolution of the Eastern Mediterranean Basin and its significance for hydrocarbon prospectivity in the ultradeepwater of the Nile Delta. The Leading Edge, 19, 1086–1102, doi: 10.1190/1.143848510.1190/1.1438485
     https://doi.org/10.1190/1.1438485 [Google Scholar]
  3. Abdel Aal, A., El Barkooky, A., Gerrits, M., Meyer, H.J., Schwander, M. and Zaki, H.2001. Tectonic evolution of the eastern Mediterranean Basin and its significance for the hydrocarbon prospectivity of the Nile Delta deepwater area. GeoArabia, 6, 363–384, doi: 10.2113/geoarabia060336310.2113/geoarabia0603363
     https://doi.org/10.2113/geoarabia0603363 [Google Scholar]
  4. Abdel-Fattah, M.I.2014. Petrophysical characteristics of the Messinian Abu Madi Formation in the Baltim East and North fields, offshore Nile Delta, Egypt. Journal of Petroleum Geology, 37, 183–195, doi: 10.1111/jpg.1257710.1111/jpg.12577
     https://doi.org/10.1111/jpg.12577 [Google Scholar]
  5. Abdel-Fattah, M.I. and Slatt, R.M.2013. Sequence stratigraphic controls on reservoir characterization and architecture: case study of the Messinian Abu Madi incised-valley fill, Egypt. Central European Journal of Geosciences, 5, 497–507, doi: 10.2478/s13533-012-0144-510.2478/s13533‑012‑0144‑5
     https://doi.org/10.2478/s13533-012-0144-5 [Google Scholar]
  6. Abdel-Fattah, M.I. and Tawfik, A.Y.2015. 3D geometric modeling of the Abu Madi reservoirs and its implication on the gas development in Baltim area (offshore Nile Delta, Egypt). International Journal of Geophysics, 2015, doi: 10.1155/2015/36914310.1155/2015/369143
     https://doi.org/10.1155/2015/369143 [Google Scholar]
  7. Abdel-Fattah, M.I., Sen, S., Abuzied, S.M., Abioui, M., Radwan, A.E. and Benssaou, M.2022. Facies analysis and petrophysical investigation of the Late Miocene Abu Madi sandstones gas reservoirs from offshore Baltim East field (Nile Delta, Egypt). Marine and Petroleum Geology, 137, doi: 10.1016/j.marpetgeo.2021.10550110.1016/j.marpetgeo.2021.105501
     https://doi.org/10.1016/j.marpetgeo.2021.105501 [Google Scholar]
  8. Abdel-Fattah, M.I., Hamdan, H.A. and Sarhan, M.A.2023. Hydrocarbon potential and reservoir characteristics of incised-valley transgressive sandstones: A case study of the Messinian gas reservoirs (Nile Delta Basin, Egypt). Journal of African Earth Sciences, 207, doi: 10.1016/j.jafrearsci.2023.10507310.1016/j.jafrearsci.2023.105073
     https://doi.org/10.1016/j.jafrearsci.2023.105073 [Google Scholar]
  9. Abdel-Fattah, M., Hanafy, M., Hamdan, H. and Attia, T.2024a. Integrated three dimensional reservoir modeling and tectonic evaluation of the Upper Cretaceous Bahariya Formation in the Burg El Arab area, Egypt: Implications for hydrocarbon exploration and production strategies. Egyptian Journal of Petroleum, 33, 259–268, doi: 10.62593/2090-2468.102610.62593/2090‑2468.1026
     https://doi.org/10.62593/2090-2468.1026 [Google Scholar]
  10. Abdel-Fattah, M.I., Reda, M., Fathy, M., Saadawi, D.A., Alshehri, F. and Ahmed, M.S.2024b. Oil-source correlation and Paleozoic source rock analysis in the Siwa Basin, Western Desert: insights from well-logs, Rock-Eval pyrolysis, and biomarker data. Energy Geoscience, 5, doi: 10.1016/j.engeos.2024.10029810.1016/j.engeos.2024.100298
     https://doi.org/10.1016/j.engeos.2024.100298 [Google Scholar]
  11. Ali, M., Abdelhady, A., Abdelmaksoud, A., Darwish, M. and Essa, M.A.2020a. 3D static modeling and petrographic aspects of the Albian/Cenomanian Reservoir, Komombo Basin, Upper Egypt. Natural Resources Research, 29, 1259–1281, doi: 10.1007/s11053-019-09521-510.1007/s11053‑019‑09521‑5
     https://doi.org/10.1007/s11053-019-09521-5 [Google Scholar]
  12. Ali, M., Abdelmaksoud, A., Essa, M.A., Abdelhady, A. and Darwish, M.2020b. 3D structural, facies and petrophysical modeling of C Member of Six Hills Formation, Komombo Basin, Upper Egypt. Natural Resources Research, 29, 2575–2597, doi: 10.1007/s11053-019-09583-510.1007/s11053‑019‑09583‑5
     https://doi.org/10.1007/s11053-019-09583-5 [Google Scholar]
  13. Ali, M., Ali, M.Y. and Abdelhady, A.2024. Cretaceous petroleum system elements in the Komombo Basin, Egypt. Petroleum Geoscience, 30, doi: 10.1144/petgeo2024-04310.1144/petgeo2024‑043
     https://doi.org/10.1144/petgeo2024-043 [Google Scholar]
  14. Archie, G.E.1942. The electrical resistivity log as an aid in determining some reservoir characteristics. Transactions of the AIME, 146, 54–62.
     [Google Scholar]
  15. Asquith, G., Krygowski, D., Henderson, S. and Hurley, N.2004. Basic relationships of well log interpretation. AAPG Methods in Exploration, 16, doi: 10.1306/Mth16823C110.1306/Mth16823C1
     https://doi.org/10.1306/Mth16823C1 [Google Scholar]
  16. Bakr, A., Reda, M. and Fathy, M.2023. Application of 3D static modelling and reservoir characterisation for optimal field development: a case study from the Kharita Formation, Karam field, Western Desert, Egypt. First Break, 41, 43–51, doi: 10.3997/1365-2397.fb202308910.3997/1365‑2397.fb2023089
     https://doi.org/10.3997/1365-2397.fb2023089 [Google Scholar]
  17. Cross, N.E., Cunningham, A., Cook, R.J., Taha, A., Esmaie, E. and El Swidan, N.2009. Three-dimensional seismic geomorphology of a deep-water slope-channel system: the Sequoia field, offshore west Nile Delta, Egypt. AAPG Bulletin, 93, 1063–1086, doi: 10.1306/0504090810110.1306/05040908101
     https://doi.org/10.1306/05040908101 [Google Scholar]
  18. Dolson, J.C., Boucher, P.J., Siok, J. and Heppard, P.D.2005. Key challenges to realizing full potential in an emerging giant gas province: Nile Delta/Mediterranean offshore, deep water, Egypt. Geological Society, London, Petroleum Geology Conference Series, 6, 607–624, doi: 10.1144/006060710.1144/0060607
     https://doi.org/10.1144/0060607 [Google Scholar]
  19. EGPC1994. Nile Delta North Sinai: Fields, Discoveries and Hydrocarbon Potentialities (A Comprehensive Overview). Egyptian General Petroleum Corporation (EGPC), Cairo.
     [Google Scholar]
  20. El-Qalamoshy, T.R., Abdel-Fattah, M.I., Reda, M., Abdelhafeez, T.H., Azzam, S.S.S. and Mosaad, M.2023. A multi-disciplinary approach for trap identification in the Southern Meleiha area, North Western Desert, Egypt: integrating seismic, well log, and fault seal analysis. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 9, 157, doi: 10.1007/s40948-023-00699-w10.1007/s40948‑023‑00699‑w
     https://doi.org/10.1007/s40948-023-00699-w [Google Scholar]
  21. El Shayeb, H.M., Abdel-Gawad, G.I., Noah, A.Z., Abuelhasan, M.M. and Ataallah, M.A.2020. Sequoia reservoir evaluation through conventional petrophysical analysis in Eastern Mediterranean, Nile Delta, Egypt. NRIAG Journal of Astronomy and Geophysics, 9, 52–62, doi: 10.1080/20909977.2020.171169610.1080/20909977.2020.1711696
     https://doi.org/10.1080/20909977.2020.1711696 [Google Scholar]
  22. Garziglia, S., Migeon, S., Ducassou, E., Loncke, L. and Mascle, J.2008. Mass-transport deposits on the Rosetta province (NW Nile deep-sea turbidite system, Egyptian margin): Characteristics, distribution, and potential causal processes. Marine Geology, 250, 180–198, doi: 10.1016/j.margeo.2008.01.01610.1016/j.margeo.2008.01.016
     https://doi.org/10.1016/j.margeo.2008.01.016 [Google Scholar]
  23. Gawad, E.A., Fathy, M., Reda, M. and Ewida, H.2020. 3D static reservoir modelling, using well logs and seismic data, to re-evaluate the oil potentiality of the Upper Rudeis Formation (Asl Member) in October oil field, Gulf of Suez, Egypt. Annals of the Geological Survey of Egypt, Egypt, the Egyptian Mineral Resources Authority, XXXIIV, 216–237.
     [Google Scholar]
  24. Gawad, E.A., Fathy, M., Reda, M. and Ewida, H.2021a. Petroleum geology: 3D reservoir modelling in the central Gulf of Suez, Egypt, to estimate the hydrocarbon possibility via petrophysical analysis and seismic data interpretation. Geological Journal, 56, 5329–5342, doi: 10.1002/gj.424110.1002/gj.4241
     https://doi.org/10.1002/gj.4241 [Google Scholar]
  25. Gawad, E.A., Fathy, M., Reda, M. and Ewida, H.2021b. Source rock evaluation of the Central Gulf of Suez, Egypt: a 1D basin modelling and petroleum system analysis. Geological Journal, 56, 3850–3867, doi: 10.1002/gj.414010.1002/gj.4140
     https://doi.org/10.1002/gj.4140 [Google Scholar]
  26. Ghoneimi, A., Farag, A.E., Bakry, A. and Nabih, M.2021. A new deeper channel system predicted using seismic attributes in Scarab gas field, West Delta Deep Marine concession, Egypt. Journal of African Earth Sciences, 177, doi: 10.1016/j.jafrearsci.2021.10415510.1016/j.jafrearsci.2021.104155
     https://doi.org/10.1016/j.jafrearsci.2021.104155 [Google Scholar]
  27. Hasan, H., Cheret, T., El Amir, A., Badalini, G. and Snijder, J.2014. West Delta deep marine hydrocarbon maturation. In: 76th EAGE Conference and Exhibition 2014. European Association of Geoscientists and Engineers (EAGE), Houten, The Netherlands, doi: 10.3997/2214-4609.2014112910.3997/2214‑4609.20141129
     https://doi.org/10.3997/2214-4609.20141129 [Google Scholar]
  28. Mamdouh, M., Reda, M., Zein El Din, M.Y. and Abdelhafeez, T.H.2023. 3D petroleum reservoir modelling using seismic and well-log data to assess hydrocarbon potential in Abu Roash (G) Member, Karama Oil Field, North-Western Desert, Egypt. Geological Journal, 59, 313–324, doi: 10.1002/gj.486510.1002/gj.4865
     https://doi.org/10.1002/gj.4865 [Google Scholar]
  29. Mamdouh, M., Reda, M., Raef, A., Zein El Din, M.Y., Abdelhafeez, T.H. and Al-Hashim, M.H.2024. Reservoir quality, lithotype assessment, and geochemical source rock analysis: insights from well logs and pyrolysis data, Karama Field, North-Western Desert, Egypt. Geofluids, 2024, doi: 10.1155/2024/123579210.1155/2024/1235792
     https://doi.org/10.1155/2024/1235792 [Google Scholar]
  30. Mohamed, I.A., Othman, A. and Fathy, M.2020. A new approach to improve reservoir modeling via machine learning. The Leading Edge, 39, 170–175, doi: 10.1190/tle39030170.110.1190/tle39030170.1
     https://doi.org/10.1190/tle39030170.1 [Google Scholar]
  31. Nassar, M., Nijenhuis, I., Abdel Fattah, T. and Ramadan, A.E.2012. Occurrence, character and origin of natural gases in the deepwater Nile Delta, Egypt. Paper SPE-152891-MS presented at theNorth Africa Technical Conference and Exhibition, February 20–22, 2012, Cairo, Egypt, doi: 10.2118/152891-MS10.2118/152891‑MS
     https://doi.org/10.2118/152891-MS [Google Scholar]
  32. Othman, A.A., Bakr, A. and Maher, A.2017. An-integrated seismic approach to de-risk hydrocarbon accumulation for Pliocene deep marine slope channels, offshore West Nile Delta, Egypt. Journal of Applied Geophysics, 147, 42–51, doi: 10.1016/j.jappgeo.2017.10.01010.1016/j.jappgeo.2017.10.010
     https://doi.org/10.1016/j.jappgeo.2017.10.010 [Google Scholar]
  33. Othman, A.A., Metwally, F., Fathy, M. and Said, W.2020. Reservoir characterization utilizing pre-stack inversion and artificial neural network techniques, Offshore Nile Delta, Egypt. First Break, 38, 37–42, doi: 10.3997/1365-2397.fb202008610.3997/1365‑2397.fb2020086
     https://doi.org/10.3997/1365-2397.fb2020086 [Google Scholar]
  34. Othman, A., Ali, A., Fathi, M. and Metwally, F.2021a. Characterizing complex slope channel reservoirs applying extended elastic impedance, Saffron gas field, offshore Nile Delta, Egypt. The Leading Edge, 40, 151a1–151a7, doi: 10.1190/tle40020151a1.110.1190/tle40020151a1.1
     https://doi.org/10.1190/tle40020151a1.1 [Google Scholar]
  35. Othman, A., Fathy, M. and Mohamed, I.A.2021b. Application of Artificial Neural Network in seismic reservoir characterization: a case study from Offshore Nile Delta. Earth Science Informatics, 14, 669–676, doi: 10.1007/s12145-021-00573-x10.1007/s12145‑021‑00573‑x
     https://doi.org/10.1007/s12145-021-00573-x [Google Scholar]
  36. Reda, M., Fathy, M. and Gawad, E.A.2022. Comprehensive 3D reservoir modelling and basin analysis: An insight into petroleum geology to re-evaluate the hydrocarbon possibilities in the Siwa Basin, North-Western Desert, Egypt. Geological Journal, 57, 1600–1616, doi: 10.1002/gj.436210.1002/gj.4362
     https://doi.org/10.1002/gj.4362 [Google Scholar]
  37. Reda, M., Abdel-Fattah, M.I., Fathy, M. and Bakr, A.2024a. Integrated analysis of source rock evaluation and basin modelling in the Abu Gharadig Basin, Western Desert, Egypt: Insights from pyrolysis data, burial history, and trap characteristics. Geological Journal, 59, 1416–1443, doi: 10.1002/gj.493810.1002/gj.4938
     https://doi.org/10.1002/gj.4938 [Google Scholar]
  38. Reda, M., Fathy, M., Mosaad, M., Alshehri, F. and Ahmed, M.S.2024b. 3D static modeling and sequence stratigraphy using well logs and seismic data: an example of Abu Roash G member in Bahga oilfield. Energy Geoscience, 5, doi: 10.1016/j.engeos.2024.10030310.1016/j.engeos.2024.100303
     https://doi.org/10.1016/j.engeos.2024.100303 [Google Scholar]
  39. Reda, M., Mostafa, T., Raef, A., Fathy, M., Alshehri, F. and Ahmed, M.2024c. Hydrocarbon reservoir characterization in the challenging structural setting of southern Gulf of Suez: Synergistic approach of well log analyses and 2D seismic data interpretation. Preprint, 2024, doi: 10.20944/preprints202401.0529.v110.20944/preprints202401.0529.v1
     https://doi.org/10.20944/preprints202401.0529.v1 [Google Scholar]
  40. Rider, M., Goodall, T. and Dodson, T.1999. A pre-development turbidite reservoir evaluation using FMS electrical images. Geological Society, London, Special Publications, 159, 123–137, doi: 10.1144/GSL.SP.1999.159.01.0610.1144/GSL.SP.1999.159.01.06
     https://doi.org/10.1144/GSL.SP.1999.159.01.06 [Google Scholar]
  41. Said, R.1983. Proposed classification of the Quaternary of Egypt. Journal of African Earth Sciences (1983), 1, 41–45, doi: 10.1016/0899-5362(83)90030-110.1016/0899‑5362(83)90030‑1
     https://doi.org/10.1016/0899-5362(83)90030-1 [Google Scholar]
  42. Said, R.1990. The Geology of Egypt. A.A. Balkema, Rotterdam, The Netherlands.
     [Google Scholar]
  43. Samuel, A., Kneller, B., Raslan, S., Sharp, A. and Parsons, C.2003. Prolific deep-marine slope channels of the Nile Delta, Egypt. AAPG Bulletin, 87, 541–560, doi: 10.1306/110502109410.1306/1105021094
     https://doi.org/10.1306/1105021094 [Google Scholar]
  44. Selim, E.S.I.2013. Subsurface structural trends of the offshore Nile Delta area, Egypt: evidence from gravity and magnetic data. Environmental Earth Sciences, 68, 1015–1032, doi: 10.1007/s12665-012-1804-y10.1007/s12665‑012‑1804‑y
     https://doi.org/10.1007/s12665-012-1804-y [Google Scholar]
  45. Selley, R.C.1998. Elements of Petroleum Geology. Gulf Professional Publishing, Houston, TX.
     [Google Scholar]
  46. Shaaban, F., Lutz, R., Littke, R., Bueker, C. and Odisho, K.2006. Source-rock evaluation and basin modelling in NE Egypt (NE Nile delta and Northern Sinai). Journal of Petroleum Geology, 29, 103–124, doi: 10.1111/j.1747-5457.2006.00103.x10.1111/j.1747‑5457.2006.00103.x
     https://doi.org/10.1111/j.1747-5457.2006.00103.x [Google Scholar]
  47. Shehata, A.A., Abdel-Fattah, M.I., Hamdan, H.A. and Sarhan, M.A.2023. Seismic interpretation and sequence stratigraphic analysis of the Bahariya Formation in the South Umbaraka oilfields (Western Desert, Egypt): insights into reservoir distribution, architecture, and evaluation. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 9, 135, doi: 10.1007/s40948-023-00673-610.1007/s40948‑023‑00673‑6
     https://doi.org/10.1007/s40948-023-00673-6 [Google Scholar]
  48. Smith, C.M. (ed.) 1984. Schlumberger Well Evaluation Conference Middle East. Schlumberger Technical Services, Paris.
     [Google Scholar]
  49. Tiab, D. and Donaldson, E.C.2024. Petrophysics: Theory and Practice of Measuring Reservoir Rock and Fluid Transport Properties. Elsevier, Amsterdam.
     [Google Scholar]
  50. Warne, A.G. and Stanley, D.J.1993. Archaeology to refine Holocene subsidence rates along the Nile delta margin, Egypt. Geology, 21, 715–718, doi: 10.1130/0091-7613(1993)021<0715:ATRHSR>2.3.CO;210.1130/0091‑7613(1993)021<0715:ATRHSR>2.3.CO;2
     https://doi.org/10.1130/0091-7613(1993)021<0715:ATRHSR>2.3.CO;2 [Google Scholar]
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Seismic and petrophysical characterization of the Sequoia Pliocene channel reservoirs: insights into hydrocarbon potential in the West Delta Deep Marine, Egypt
Petroleum Geoscience 31, petgeo2024-070 (2025); https://doi.org/10.1144/petgeo2024-070
/content/journals/10.1144/petgeo2024-070
/content/journals/10.1144/petgeo2024-070
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