Hierarchical parameterization and compression-based object modelling of high net: gross but poorly amalgamated deep-water lobe deposits

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Title: Hierarchical parameterization and compression-based object modelling of high net: gross but poorly amalgamated deep-water lobe deposits
Authors: Manzocchi, TomZhang, LeifuHaughton, Peter D. W.Pontén, A.
Permanent link: http://hdl.handle.net/10197/11558
Date: 27-Jan-2020
Online since: 2020-09-10T08:58:05Z
Abstract: Deepwater lobe deposits are arranged hierarchically and can be characterized by high net:gross ratios but poor sand connectivity due to thin but laterally extensive shale layers. This heterogeneity makes them difficult to represent in standard full-field object-based models, since the sands in an object-based model are not stacked compensationally and become connected at a low net:gross ratio. The compression algorithm allows generation of low connectivity object-based models at high net:gross ratios, by including the net: gross and amalgamation ratios as independent input parameters. Object-based modelling constrained by the compression algorithm has been included in a recursive workflow, permitting generation of realistic models of hierarchical lobe deposits. Representative dimensional and stacking parameters collected at four different hierarchical levels have been used to constrain a 250 m thick, 14 km2 model that includes hierarchical elements ranging from 20 cm thick sand beds to 30+ m thick lobe complexes. Sand beds and the fine-grained units are represented explicitly in the model, and the characteristic facies associations often used to parameterize lobe deposits are emergent from the modelling process. The model is subsequently resampled without loss of accuracy for flow simulation, and results show clearly the influence of the hierarchical heterogeneity on drainage and sweep efficiency during a water-flood simulation.
Funding Details: University College Dublin
metadata.dc.description.othersponsorship: PIPCO RSG Ltd.
FIFT II joint industry project
China Scholarship Council
Type of material: Journal Article
Publisher: Geological Society of London
Journal: Petroleum Geoscience
Volume: 26
Issue: 4
Copyright (published version): 2020 the Authors
Keywords: Bedding sedimentsPlanar bedding structuresRoss FormationSandSedimentary structuresSediments
DOI: 10.1144/petgeo2018-078
Language: en
Status of Item: Peer reviewed
ISSN: 1354-0793
Appears in Collections:Earth Sciences Research Collection
ICRAG Research Collection

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