Rule-Based Models of Deep-Water Lobes and Their Influence on Connectivity

López-Cabrera, Javier; Manzocchi, Tom; Haughton, Peter D. W.

doi:10.3997/2214-4609.201901676

Cited by 2 publications

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“…Both local and global connectivity can be measured in rule-based models. Different rules governing erosion and aggradation of the depositional elements provide models with a diversity of local connectivity representative of natural systems ( [14], Fig. 3c).…”

Section: Connectivity In Facies Models and Natural Systemsmentioning

confidence: 99%

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Compression-Based Modelling Honouring Facies Connectivity in Diverse Geological Systems

Manzocchi

Walsh

López-Cabrera

et al. 2023

Springer Proceedings in Earth and Environmental Sciences

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In object- or pixel-based modelling, facies connectivity is tied to facies proportion as an inevitable consequence of the modelling process. However, natural geological systems (and rule-based models) have a wider range of connectivity behaviour and therefore are ill-served by simple modelling methods in which connectivity is an unconstrained output property rather than a user-defined input property. The compression-based modelling method decouples facies proportions from facies connectivity in the modelling process and allows models to be generated in which both are defined independently. The two-step method exploits the link between the connectivity and net:gross ratio of the conventional (pixel- or object-based) method applied. In Step 1 a model with the correct connectivity but incorrect facies proportions is generated. Step 2 applies a geometrical transform which scales the model to the correct facies proportions while maintaining the connectivity of the original model. The method is described and illustrated using examples representative of a poorly connected deep-water depositional system and a well-connected fluid-driven vein system.

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Section: Connectivity In Facies Models and Natural Systemsmentioning

confidence: 99%

“…3c) rather than at a critical NTG, since RBMs can remain at low connectivity to very high NTG. The RBMs examined [14,15] had approximately circular bodies, but by analogy with OBM, it is likely that AR C for channelized RBMs will be lower.…”

Section: Connectivity In Facies Models and Natural Systemsmentioning

confidence: 99%

Compression-Based Modelling Honouring Facies Connectivity in Diverse Geological Systems

Manzocchi

Walsh

López-Cabrera

et al. 2023

Springer Proceedings in Earth and Environmental Sciences

View full text Add to dashboard Cite

show abstract

Compression-based Facies Modelling

et al. 2023

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Simple object- or pixel-based facies models use facies proportions as the constraining input parameter to be honored in the output model. The resultant interconnectivity of the facies bodies is an unconstrained output property of the modelling, and if the objects being modelled are geometrically representative in three dimensions, commonly-available methods will produce well-connected facies when the model net:gross ratio exceeds about 30%. Geological processes have more degrees of freedom, and facies in high net:gross natural systems often have much lower connectivity than can be achieved by object-based or common implementations of pixel-based forward modelling. The compression method decouples facies proportion from facies connectivity in the modelling process and allows systems to be generated in which both are defined independently at input. The two-step method first generates a model with the correct connectivity but incorrect facies proportions using a conventional method, and then applies a geometrical transform to scale the model to the correct facies proportions while retaining the connectivity of the original model. The method, and underlying parameters, are described and illustrated using examples representative of low and high connectivity geological systems.

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Rule-Based Models of Deep-Water Lobes and Their Influence on Connectivity

Cited by 2 publications

References 0 publications

Compression-Based Modelling Honouring Facies Connectivity in Diverse Geological Systems

Compression-Based Modelling Honouring Facies Connectivity in Diverse Geological Systems

Compression-based Facies Modelling

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