Process-based Modelling of Sediment Distribution in Fluvial Crevasse Splays

Sandén, A.B.; Boerboom, H.T.W.; Donselaar, M.E.; Storms, J.E.A.; Toorenenburg, K.A. van; Vegt, Helena van der; Weltje, Gert Jan

doi:10.3997/2214-4609.201600929

Cited by 2 publications

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“…Over the last decade, a combination of field data, high-resolution satellite imagery, and conceptual and numerical modelling has been used to document the flood hydrology and channel-floodplain morphodynamics approaching the terminus of the Río Colorado, and assess the sedimentological implications (e.g. Donselaar et al, 2013Donselaar et al, , 2022Li et al, 2014Li et al, , 2018Li et al, , 2019Li et al, , 2020aSandén, 2016;van Toorenenburg et al, 2018). Similar to the lower reaches of many other ephemeral dryland rivers, there is a significant downstream decrease in the crosssectional area of the river from ~80 m 2 to <5 m 2 and its associated sediment transport capacity (Donselaar et al, 2013(Donselaar et al, , 2022.…”

Section: Study Area and Previous Work On The Splays Of The Lower Río ...mentioning

confidence: 99%

Crevasse splay morphodynamics near a non-vegetated, ephemeral river terminus: Insights from process-based modelling

Vegt

Storms

et al. 2023

Journal of Hydrology

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Section: Study Area and Previous Work On The Splays Of The Lower Río ...mentioning

confidence: 99%

Crevasse splay morphodynamics near a non-vegetated, ephemeral river terminus: Insights from process-based modelling

Vegt

Storms

et al. 2023

Journal of Hydrology

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Combining process-based models and multiple-point geostatistics for improved reservoir modelling

Mullins

Vegt

Howell

2021

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The construction of subsurface reservoir models is typically aided by the use of outcrops and modern analogue systems. We show how process- based models of depositional systems help develop and substantiate reservoir architectural concepts. Process-based models can simulate assumptions relating to the physical processes influencing sedimentary deposition, accumulation and erosion on the resultant 3D sediment distribution. In this manner, a complete suite of analogue geometries can be produced by implementing different sets of boundary conditions based on hypotheses of depositional controls. Simulations are therefore not driven by a desired/ defined outcome in the depositional patterns, but their application to date in reservoir modelling workflows has been limited because they cannot be conditioned to data such as well logs or seismic information.In this study a reservoir modelling methodology is presented that addresses this problem using a two-step approach: process-based models producing 3D sediment distributions, which are subsequently used to generate training images for multi-point geostatistics.The approach has been tested on a dataset derived from a well-exposed outcrop from central Utah. The Ferron Sandstone Member includes a shallow marine deltaic interval that has been digitally mapped using a high resolution Unmanned Aerial Vehicle (UAV) survey in 3D to produce a virtual outcrop (VO). The VO was used as the basis to build a semi-deterministic outcrop reference model against which to compare the results of the combined process/Multiple Point Statistics (MPS) geostatistical realizations. Models were compared statically and dynamically by flow simulation.When used with a dense well dataset, the MPS realizations struggle to account for high levels of non-stationarity inherent in the depositional system that are captured in the process-based training image. When trends are extracted from the outcrop analogue and used to condition the simulation, the geologically realistic geometries and spatial relationships from the process-based models are directly imparted onto the modelling domain, whilst simultaneously allowing the facies models to be conditioned to subsurface data.When sense-checked against preserved analogues, this approach reproduces more realistic architectures than traditional, more stochastic techniques.

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Process-based Modelling of Sediment Distribution in Fluvial Crevasse Splays

Cited by 2 publications

References 0 publications

Crevasse splay morphodynamics near a non-vegetated, ephemeral river terminus: Insights from process-based modelling

Crevasse splay morphodynamics near a non-vegetated, ephemeral river terminus: Insights from process-based modelling

Combining process-based models and multiple-point geostatistics for improved reservoir modelling

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