Calibrating fault seal using a hydrocarbon migration model of the Oseberg Syd area, Viking Graben

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Show simple item record Childs, Conrad Sylta, Oyvind Moriya, S. Morewood, Nigel Manzocchi, Tom Walsh, John J. Hermanssen, D. 2011-07-20T14:23:12Z 2011-07-20T14:23:12Z 2008 Elsevier Ltd. en 2009-06
dc.identifier.citation Marine and Petroleum Geology en
dc.identifier.issn 0264-8172
dc.description.abstract It is widely acknowledged that fault rock capillary properties are important in controlling the distribution of hydrocarbons in sedimentary basins, and methods exist for predicting the capillary seal capacity of prospect bounding faults. However, fault seal capacity is rarely incorporated into models of hydrocarbon migration. This paper presents the results of migration modelling of the Oseberg Syd area of the Viking Graben incorporating fault rock capillary properties. Seal capacity is calculated in the model as a function of Shale Gouge Ratio (SGR), i.e. the percentage shale in the sequence moved past a point on a fault. Over 3 000 model realisations were run for different SGR to fault seal capacity relationships and the calculated hydrocarbon distributions were compared with known distributions. Realisations were ranked according to the closeness of fit between model and actual oil-water contacts for 7 traps. The best-fit to all 7 traps was provided by realisations with significant seal capacity at SGR values greater than ca. 0.2; a value which is in agreement with an independently derived fault-by-fault calibration between SGR and seal capacity. The level of fill calculated for an individual trap is extremely sensitive to minor changes in the seal capacity relationship because it is controlled not only by the seal capacities of the faults that bound the trap, but also by the pattern of fill-spill of upstream traps. This sensitivity to minor changes in seal capacity introduces large uncertainties when fault seal capacity relationships are used in a predictive mode and emphasises the requirement for migration modelling in fault seal prospect evaluation. en
dc.description.sponsorship Not applicable en
dc.format.extent 824131 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Elsevier en
dc.rights This is the author’s version of a work that was accepted for publication in Marine and Petroleum Geology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Marine and Petroleum Geology Volume 26, Issue 6, June 2009, Pages 764-774 DOI#:10.1016/j.marpetgeo.2008.05.004. en
dc.subject Fault seal en
dc.subject Hydrocarbon migration en
dc.subject Capillary pressure en
dc.subject Migration modelling en
dc.subject SGR calibration en
dc.subject.lcsh Faults (Geology)--Mathematical models en
dc.subject.lcsh Grabens (Geology)--Norway--Oseberg en
dc.subject.lcsh Hydrocarbon reservoirs en
dc.title Calibrating fault seal using a hydrocarbon migration model of the Oseberg Syd area, Viking Graben en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions en
dc.status Peer reviewed en
dc.identifier.volume 26 en
dc.identifier.issue 6 en
dc.identifier.startpage 764 en
dc.identifier.endpage 774 en
dc.identifier.doi 10.1016/j.marpetgeo.2008.05.004
dc.neeo.contributor Childs|Conrad|aut| en
dc.neeo.contributor Sylta|Oyvind|aut| en
dc.neeo.contributor Moriya|S.|aut| en
dc.neeo.contributor Morewood|Nigel|aut| en
dc.neeo.contributor Manzocchi|Tom|aut| en
dc.neeo.contributor Walsh|John J.|aut| en
dc.neeo.contributor Hermanssen|D.|aut| en

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