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The discovery of the Fat Sand Play (Solling Formation, Triassic), Northern Dutch offshore – a case of serendipity

Published online by Cambridge University Press:  24 March 2014

J. de Jager
J. de Jager*
Affiliation:
Utrecht University, Faculty of Earth Sciences, PO Box 80021, 3508 TA, Utrecht, the Netherlands. Email: jan.dejager@hotmail.com.
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Abstract

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In 1992, the well L9-7, drilled by the Nederlandse Aardolie Maatschappij (NAM) unexpectedly found a thick previously unknown sandstone interval with excellent reservoir characteristics in the Middle Buntsandstein (Triassic) of the Dutch Northern Offshore: the ‘Fat Sand’. A follow-up well, L9-8, found this reservoir gas-bearing in an accumulation that turned out have recoverable reserves of circa 1 Tcf of gas distributed over several fault compartments. This serendipitous discovery led to a frantic period in NAM's office trying to understand the setting of this local sand development and, most importantly, assess follow-up potential; could this sand be present elsewhere in a trapping configuration? The local depocentre in which the Fat Sand accumulated is considered to be caused by local extension along a strongly listric fault soling out on the top of the Zechstein Salt. This supra-salt fault seems to be caused by early east-west extension in the Dutch northern offshore. The shape of the fault plane was strongly influenced by the presence of the nearby Zechstein Salt, and by early salt flow, which was also triggered by E-W extension.

Keywords

ExplorationNetherlandsTriassicSollingFat Sand
Type
Research Article
Information
Netherlands Journal of Geosciences , Volume 91 , Issue 4 , December 2012 , pp. 609 - 619
Copyright
Copyright © Stichting Netherlands Journal of Geosciences 2013

References

Bachmann, G.H., Geluk, M.C., Warrington, G., Becker-Roman, A., Beutler, G., Hagdorn, H., Hounslow, M.W., Nitsch, E., Röhling, H.-G., Simon, T. & Szulc, A., 2010. Triassic. In: Doornenbal, J.C. & Stevenson, A.G. (eds): Petroleum Geological Atlas of the Southern Permian Basin Area. EAGE Publications b.v. (Houten): 149–173.Google Scholar
De Jager, J., 2007. Geological development. In: Wong, T.E., Batjes, D.A.J. & De Jager, J. (eds): Geology of the Netherlands. Royal Netherlands Academy of Arts and Sciences (KNAW) (Amsterdam): 5–26.Google Scholar
De Jager, J. & Geluk, M.C., 2007. Petroleum geology. In: Wong, T.E., Batjes, D.A.J. & De Jager, J. (eds): Geology of the Netherlands. Royal Netherlands Academy of Arts and Sciences (KNAW) (Amsterdam): 241–264.Google Scholar
Fontaine, J.M., Guastella, G., Jouault, P. & De la Vega, P., 1993. F15-A: a Triassic gas field on the easetrn limit of the Dutch Central Graben. In: Parker, J.R. (ed.): Petroleum Geology of North-West Europe: Proceedings of the 4th Conference. The Geological Society (London): 583–593.Google Scholar
Gast, R.E., Dusar, M., Breitkreuz, C., Gaupp, R., Schneider, J.W., Stemmerik, L., Geluk, M.C., Geißler, M., Kiersnowski, H., Glennie, K.W., Kabel, S. & Jones, N.S., 2010. Rotliegend. In: Doornenbal, J.C. & Stevenson, A.G. (eds): Petroleum Geological Atlas of the Southern Permian Basin Area. EAGE Publications b.v. (Houten): 101–121.Google Scholar
Geluk, M.C., 2005. Stratigraphy and tectonics of Permo-Triassic basins in the Netherlands and surrounding areas. PhD thesis, Utrecht University (Utrecht), 171 pp.Google Scholar
Geluk, M.C., 2007a. Permian. In: Wong, T.E., Batjes, D.A.J. & De Jager, J. (eds): Geology of the Netherlands. Royal Netherlands Academy of Arts and Sciences (KNAW) (Amsterdam): 63–84.Google Scholar
Geluk, M.C., 2007b. Triassic. In: Wong, T.E., Batjes, D.A.J. & De Jager, J. (eds): Geology of the Netherlands. Royal Netherlands Academy of Arts and Sciences (KNAW) (Amsterdam): 85–106.Google Scholar
Geluk, M.C. & Röhling, H.G., 1997. High-resolution sequence stratigraphy of the Lower Triassic Buntsandstein in the Netherlands and northwestern Germany. Geologie en Mijnbouw 76: 227–246.CrossRefGoogle Scholar
Herngreen, G.F.W., Smit, R. & Wong, T.E., 1991. Stratigraphy and tectonics of the Vlieland basin, the Netherlands. In: Spencer, A.M. (ed.): Generation, accumulation and production of Europe's hydrocarbons. Special Publication of the European Association of Petroleum Geoscientists (Berlin): 175–192.Google Scholar
Kombrink, H., Doornenbal, J.C., Duin, E.J.T., Den Dulk, M., Van Gessel, S.F., Ten Veen, J.H. & Witmans, N., 2012. New insights into the geological structure of the Netherlands; results of a detailed mapping project. Netherlands Journal of Geosciences 91–4: 419–446, this issue.CrossRefGoogle Scholar
Van Buggenum, J.M. & Den Hartog Jager, D.G., 2007. Silesian. In: Wong, T.E., Batjes, D.A.J. & De Jager, J. (eds): Geology of the Netherlands. Royal Netherlands Academy of Arts and Sciences (KNAW) (Amsterdam): 43–62.Google Scholar
Van der Zwan, C.J. & Spaak, P., 1992. Lower to Middle Triassic sequence stratigraphy and climatology of the Netherlands, a model. Palaeogeography, Palaeoclimatology, Palaeoecology 91: 277–290.CrossRefGoogle Scholar
Ziegler, P.A., 1990. Tectonic and palaeogeogaphic development of the North Sea Rift system. In: Blundell, D.J. & Gibbs, A.D. (eds): Tectonic Evolution of the North Sea Rifts. Oxford Science Publications (Oxford): 1–36.Google Scholar