Mechanisms Controlling the Clustering of Fluvial Channels and the Compensational Stacking of Cluster Belts

Hofmann, Michaël; Wroblewski, Anton; Boyd, Ron

doi:10.2110/jsr.2011.54

Cited by 41 publications

(17 citation statements)

References 53 publications

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“…Channel clustering identified in river-based studies is equivalent to the high density regions identified in Figure 7c, with channel organisation on both environments being predominantly controlled by non-random processes. Considering that channel clusters are good indicators of the predominant sand fairways on sub-aerial settings (Hofmann et al, 2011), identifying the slope regions with higher channel density also allows an estimation of the lateral extent of the main clusters and consequently of the areas with higher probabilities for the occurrence of sand. This gains particular relevance for the assessment of compartmentalisation of stratigraphic units with distinct reservoir-prone channel clusters, with the larger spacing between them implying the higher risk of lower lateral connectivity.…”

Section: Controls On Channel Clustering On Submarine Environmentsmentioning

confidence: 99%

“…This poses a key advantage for the characterization of submarine systems that exhibit complex erosional patterns and unclear boundaries between distinct stratigraphic units, which can be clearly identified using the proposed method. The quantification of channel morphological and spatial data is relevant to understand the organization of both submarine or sub-aerial channel systems and their controlling factors (Hajek et al, 2010;Hofmann et al, 2011;Straub et al, 2009). Thus, the method presented aims to allow a 3D statistical analysis of specific intervals of submarine slopes and to predict channel density and distribution patterns, which can help in a) the assessment of sedimentary facies distribution and consequently in b) modelling the spatial location of reservoir-prone intervals and c) risk analysis prior to drilling.…”

Section: Introductionmentioning

confidence: 99%

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A submarine channel confluence classification for topographically confined slopes

Gamboa

Alves

Cartwright

2012

Marine and Petroleum Geology

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Section: Controls On Channel Clustering On Submarine Environmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A submarine channel confluence classification for topographically confined slopes

Gamboa

Alves

Cartwright

2012

Marine and Petroleum Geology

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“…Channel‐belt stacking patterns describe how channelized deposits are spatially located relative to one another (Allen, ; Clark & Pickering, ; Straub et al ., ; Hoffman et al ., ; Colombera et al ., ; Flood & Hampson, ). Two methods used to describe stacking patterns in fluvial systems are: (i) clustering; and (ii) compensational stacking.…”

Section: Introductionmentioning

confidence: 98%

The influence of lateral topographic confinement on fluvial channel‐belt clustering, compensation and connectivity – lower Wasatch Formation and Dakota Sandstone, Utah, USA

2017

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Fluvial channel‐belt clustering has recently been documented using quantitative metrics for systems dominated by autogenic controls. It has long been recognized that allogenic forcing (tectonic and eustatic controls) can lead to confinement of fluvial systems, resulting in clustering of channel belts. To date, no study has quantitatively documented the differences in channel‐belt clustering, compensational stacking of channel belts and interchannel‐belt connectivity in unconfined and confined systems. This study quantitatively compares world‐class outcrops of an unconfined fluvial system (Palaeocene lower Wasatch Formation) with outcrops of a confined fluvial system (Cretaceous Dakota Sandstone). Two new methods have been developed to quantitatively document channel‐belt clustering and intrachannel‐belt connectivity. These new methods, and other previously developed methods, are used to document an increase in channel‐belt clustering and intrachannel‐belt connectivity downdip in both systems. Additionally, it was found that channel belts within the unconfined system stack more compensationally than those in the confined system. These new methods and empirical relationships can be used for predicting intrachannel‐belt connectivity, and accurately modelling unconfined and confined fluvial systems in the subsurface.

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“…This tendency can be seen in avulsions, which often occur following the aggradation of a channel bottom to an elevation equivalent or greater than the bordering floodplain, at which time channels become prone to avulse during flood events [Mohrig et al, 2000]. Compensational stacking has been used to describe the large-scale architecture of deepwater and fluvial deposits, and, in particular, delta packages [Olariu and Bhattacharya, 2006;Hofmann et al, 2011;Hajek et al, 2012], wherein periodic channel or lobe avulsions occur, reorganizing the sediment transport field along local topographic lows.…”

Section: Introductionmentioning

confidence: 99%

Influence of water and sediment supply on the long‐term evolution of alluvial fans and deltas: Statistical characterization of basin‐filling sedimentation patterns

Straub

Wang

2013

JGR Earth Surface

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[1] The temporal and spatial variability of sedimentation, resulting from sediment storage and release and the lateral mobility of sediment transporting flows, imparts fundamental patterns into the stratigraphic record. Recent studies show that paleoenvironmental (allogenic) signals preserved in stratigraphy may be contaminated by internally generated (autogenic) sedimentation patterns; however, it is unclear how the magnitude of autogenic dynamics is related to allogenic forcings. Utilizing statistical methods, we quantify basin-filling trends in three laboratory experiments where input water and sediment flux were varied. We use the compensation index and compensation time scale to estimate the strength of compensation, defined here as the tendency to fill topographic lows faster than would result from random deposit stacking, and to estimate the time scales over which autogenic processes operate. In the experiments, topography of channelized deltas formed by noncohesive sediment was monitored in a basin experiencing temporally and spatially uniform relative subsidence. Each experiment resulted in construction of a stratigraphic package in excess of 25 channel depths thick. We find that compensation strength in the experiments is not influenced by absolute magnitudes of water and sediment flux but does increase as a function of the ratio of water to sediment flux. A compensation time scale, defined as the maximum depth of a system's channels divided by the long-term deposition rate, accurately defines the maximum time scale at which autogenic dynamics occur in all experiments. When applied to field-scale systems, we predict that autogenic dynamics occur out to time scales between 5 and 150 kyr.Citation: Straub, K. M., and Y. Wang (2013), Influence of water and sediment supply on the long-term evolution of alluvial fans and deltas: Statistical characterization of basin-filling sedimentation patterns,

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Mechanisms Controlling the Clustering of Fluvial Channels and the Compensational Stacking of Cluster Belts

Cited by 41 publications

References 53 publications

A submarine channel confluence classification for topographically confined slopes

A submarine channel confluence classification for topographically confined slopes

The influence of lateral topographic confinement on fluvial channel‐belt clustering, compensation and connectivity – lower Wasatch Formation and Dakota Sandstone, Utah, USA

Influence of water and sediment supply on the long‐term evolution of alluvial fans and deltas: Statistical characterization of basin‐filling sedimentation patterns

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