Submarine landslide and associated polygonal faults development: a case study from offshore Norway

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    Hanoi University of Mining and Geology, Hanoi, Vietnam

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  • Received: 25th-Aug-2022
  • Revised: 28th-Nov-2022
  • Accepted: 30th-Dec-2022
  • Online: 1st-Feb-2023
Pages: 75 - 82
Views: 3037
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Abstract:

Submarine slide and polygonal faults have been investigated using high-resolution 3D seismic data, over an area of 2,300 km2. The study area is located on the continental slope, offshore Norway. Submarine sliding covers more than half of the study area, and is part of the Storage slide. The slide developed a series of extensional faults at the upper extensional zone which is gradually changed to chaos seismic facies, interpreted as mass transport deposits. There is no clear evidence of compression/contractional zone downslope. Polygonal faults are highly developed in the KS1 and KS2 interval, corresponding to the Lower Miocene age. The fault has small offset of c. 10÷30 ms TWT, spacing ranges between c. 500 m and 1 km. Within this faulted interval, faults tend to develop intensively below the submarine sliding and much less out of that area. Bright amplitude anomalies are observed within the north south – elongated anticline structure. It has been mapped over an area of c. 135 km2 coinciding with the top anticline. Among those, there are two obvious negatives, bright amplitude reflectors which are relatively flat at 2670 ms TWT (flat spot 1) and 2800 ms TWT (flat spot 2). These flat spots are interpreted as hydrocarbon-brine contacts. Flat spot 2 is bounded by the structure contour but there is no evidence for the unconformable with the lithologic reflections from the trap boundary, thus this still needs to be confirmed by well data. Bright amplitude anomalies suggest the existence of hydrocarbon in the trap, in addition, the occurrence of polygonal faults is linked to seal potential covering the underneath petroleum reservoir, proving the great hydrocarbon potential in this area.

How to Cite
Le, A.Ngoc and Bui, N.Thi 2023. Submarine landslide and associated polygonal faults development: a case study from offshore Norway. Journal of Mining and Earth Sciences. 64, 1 (Feb, 2023), 75-82. DOI:https://doi.org/10.46326/JMES.2023.64(1).08.
References

Alexander, L. L. and Handschy, J. W. (1998). Fluid flow in a faulted reservoir system: fault trap analysis for the Block 330 field in Eugene Island, south addition, offshore Louisiana. AAPG bulletin, 82, 387-411.

Bryn, P., Berg, K., Forsberg, C. F., Solheim, A., and Kvalstad, T. J. (2005). Explaining the Storegga slide. Marine and Petroleum Geology, 22(1-2), 11-19.

Berndt, C. (2005). Focused fluid flow in passive continental margins. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 363, 2855-2871.

Bondevik, S., Mangerud, J., Dawson, S., Dawson, A. and Lohne, Ø. (2003). Record‐breaking height for 8000‐year‐old tsunami in the North Atlantic. Eos, Transactions American Geophysical Union, 84, 289-293.

Brekke, H. (2000). The tectonic evolution of the Norwegian Sea continental margin, with emphasis on the Voring and More basins. Special Publication-Geological Society of London, 167, 327-378.

Cartwright, J., Huuse, M. and Aplin, A. (2007). Seal bypass systems. AAPG bulletin, 91, 1141-1166.

Færseth, R. B. and Sætersmoen, B. H. (2008). Geometry of a major slump structure in the Storegga slide region offshore western Norway. Norsk Geologisk Tidsskrift, 88, 1.

Gay, A. and Berndt, C. (2007). Cessation/reactivation of polygonal faulting and effects on fluid flow in the Vøring Basin, Norwegian Margin. Journal of the Geological Society, 164, 129-141.

Gay, A., Padron, C., Meyer, S., Beaufort, D., Oliot, E., Lallemand, S., Marcaillou, B., Philippon, M., Cornée, J.J., Audemard, F. and Lebrun, J.F.  (2021). Elongated giant seabed polygons and underlying polygonal faults as indicators of the creep deformation of Pliocene to recent sediments in the Grenada Basin, Caribbean Sea. Geochemistry, Geophysics, Geosystems, 22(12), p. e2021GC009809.

Haflidason, H., Lien, R., Sejrup, H. P., Forsberg, C. F. and Bryn, P. (2005). The dating and morphometry of the Storegga Slide. Marine and Petroleum Geology, 22, 123-136.

James, D.M.D. (1997). Discussion on a model for the structure and development of fault zones. Journal of the Geological Society-London, 154(2), 366-368.

Jansen, E., Befring, S., Bugge, T., Eidvin, T., Holtedahl, H. and Sejrup, H. P., (1987). Large submarine slides on the Norwegian continental margin: sediments, transport and timing. Marine Geology, 78, 77-107.

Knipe, R., (1997). Juxtaposition and seal diagrams to help analyze fault seals in hydrocarbon reservoirs. AAPG bulletin, 81, 187-195.

Le, A.N. (2021). Characterization and Distribution of Cenozoic Polygonal Fault: Case Studies in West Africa and Vietnam Continental Margins. The Iraqi Geological Journal, 19-28.

Ligtenberg, J. (2005). Detection of fluid migration pathways in seismic data: implications for fault seal analysis. Basin Research, 17, 141-153.

Løseth, H., Wensaas, L., Arntsen, B., Hanken, N.-M., Basire, C. and Graue, K. (2011). 1000 m long gas blow-out pipes. Marine and Petroleum Geology, 28, 1047-1060.

Michum Jr, R. M. (1977). Stratigraphic Interpretation of Seismic Reflection Patterns in Depositional Sequences, Seismic Stratigraphy applications to hydrocarbon exploration. AAPG, Mem., 26, 117-133.

Neagu, R. C., Cartwright, J. and Davies, R. (2010). Measurement of diagenetic compaction strain from quantitative analysis of fault plane dip. Journal of Structural Geology, 32, 641-655.

Vail, P. R., Mitchum, R. M. and Thompson, S. (1977). Seismic stratigraphy and global changes of sea level, part 3: relative changes of sea level from coastal onlap. In C. W. Payton, ed., Seimic stratigraphy applications to hydrocarbon exploration: AAPG Memoir. 26, 216-235.