Turbidite channel reservoirs—Key elements in facies prediction and effective development

Mayall, Mike; Jones, E.V.; Casey, Mick

doi:10.1016/j.marpetgeo.2006.08.001

Cited by 369 publications

(310 citation statements)

References 62 publications

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“…The presence of coarsegrained deposits at the base of sandstone beds probably represents lag deposits indicative of sediment bypass and throughgoing turbidity currents. The horizontal and vertical stacking of sandstone beds strongly suggests lateral migration of sandy channel belts in a deep-marine environment (e.g., Beaboef, 2004, Mayall et al, 2006Wynn et al, 2007). The outcrops do not allow for plan view of the sandstone geometries, but the associations have a strong resemblance to sinuous channel systems (e.g., Janocko et al, 2013;Li et al, 2016) (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The active channel will be dominated by conglomerates, while sandy material will be deposited along channel margins both as clean sandstone beds and, as a result of channel 'overflow' , also as matrix between the clast material. Flow velocities will vary within a sinuous channel system, and flow separation will result in the development of lateral accretion surfaces and bar forms at channel bends (e.g., Posamentier & Kolla, 2003;Mayall et al, 2006;Janocko et al, 2013). Flows may erode the matrix-rich deposits in fast-flowing parts of the channel and deposit its material where the flow slows down at the next channel bend.…”

Section: Discussionmentioning

confidence: 99%

“…The increased focus on deep-marine deposits and processes was largely driven by the oil industry and the identification of these deposits as exploration targets. Our understanding of deep-water depositional systems has since advanced significantly mainly due to the advent of high-quality 3D seismic data from continental margins worldwide (Posamentier & Kolla, 2003;Mayall et al, 2006;Janocko et al, 2013;Gong et al, 2015).…”

Section: Earlier Research On Turbidite Systemsmentioning

confidence: 99%

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Turbidite and conglomerate successions in an Ordovician back-arc basin, Mid-Norwegian Caledonides: a result of long-term staging followed by catastrophic release of sediments

Henriksen¹,

Roberts²,

Pedersen³

2018

NJG

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The Ordovician metasedimentary rocks in the Caledonian nappes in Mid Norway were deposited in a back-arc setting, following ophiolite obduction, uplift and erosion, related to continental uplift and changing directions of subduction during this period. Deep-water conditions were established in the basin and this accommodated a thick succession of variously coarse-grained, conglomeratic and argillaceous sediments. The conglomerates typically display the well-rounded clast material of variable igneous, volcanic, sedimentary and carbonate origin and alternate between being clast-supported and matrix-supported with interbedded sandstone beds. The rounded clasts suggest significant reworking and long-term storage of sediments in the source area before transport into the deeper part of the basin. The basal surface of conglomerates always shows an erosive contact with underlying shales or coarsening-upward sandstone successions. The basal surfaces probably represent sedimentary fairways, where several conglomerate units separated by erosional contacts are stacked on top of each other. The conglomerate successions likely result from episodic release of large quantities of sediments. Between each burst of release, sediments accumulated in alluvial fans, fan deltas and fluvial delta systems along the basin shoreline and carbonate reefs established on the outer shelf. Laterally accreting channel sandstone beds were probably important in setting up sedimentary fairways for the succeeding conglomerates. In the inferred deepest part of the basin, smaller channellised features and thin-bedded turbidites seem to dominate. Channel features and hummocky cross-stratification in shelf to upper slope sandstone beds are alternatively interpreted to result from unidirectional flows and constitute an integral part of the turbidite system. By including all the observed facies within the turbidite system we invoke a depositional model which does not require a eustacy-driven sequence-stratigraphic model for explanation. We rather suggest a tectonic model involving an elevated source area, either volcanic or continental, where erosional products are stored and reworked in the alluvial accommodation zone. These sediments are built up to a threshold level and flushed to the sea by a sudden availability of large amounts of water. The actual cause of this sudden availability of water remains uncertain, but the consequent mixture of water and sediments resulted in a super-concentrated high-energy density current. Turbidite and conglomerate successions in an Ordovician back-arc basin, Mid-Norwegian Caledonides: a result of long-term staging followed by catastrophic release of sediments IntroductionThe Caledonides of central Norway are especially well known for their fragmented ophiolite assemblages and, in some areas, the overlying, richly fossiliferous, Ordovician to inferred Early Silurian, low-grade metasedimentary rocks (Bergström, 1979(Bergström, , 1997Bruton & Bockelie, 1980;Ryan et al., 1980;Neuman & Bruton, 1989;Neuman et al., 1997). The...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Earlier Research On Turbidite Systemsmentioning

confidence: 99%

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Turbidite and conglomerate successions in an Ordovician back-arc basin, Mid-Norwegian Caledonides: a result of long-term staging followed by catastrophic release of sediments

Henriksen¹,

Roberts²,

Pedersen³

2018

NJG

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“…Discontinuities in submarine channel morphology and stratigraphy, such as incisions of different scales, knickpoints, and terraces, are commonly interpreted as the result of external forcing (e.g., Posamentier and Kolla, 2003;Mayall et al, 2006). We suggest that the autogenic processes of channel bend growth and cutoff formation can lead to numerous morphologic and stratigraphic discontinuities, without changes in sea level or climate, and without structural deformation or major avulsions.…”

Section: Discussionmentioning

confidence: 84%

Development of cutoff-related knickpoints during early evolution of submarine channels

Sylvester¹,

Covault²

2017

Preprint

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Submarine channels are often thought of as having relatively simple geometries, with significant alongchannel morphologic and stratigraphic continuity. Using high-resolution seismic reflection data from offshore Angola and a kinematic model of channel evolution, we present evidence that channels on the seafloor can develop slope variability as a result of meander cutoff events. When cutoffs develop, the shortened flow paths produce locally steep gradients, thus initiating knickpoints. Waves of knickpoint retreat and the related channel incision explain the occurrence of terraces and associated remnant channel deposits above the youngest channel thalweg. The simple processes of meander cutoff followed by knickpoint retreat are intrinsic to submarine channels and result in significant morphologic variability, erosion, and stratigraphic complexity, without any external forcing. These insights highlight the early evolution of submarine channels, a phase with a record that is commonly fragmented or completely absent as a result of subsequent erosion, and allow a better understanding of the autogenic controls on deep-marine stratigraphy.

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“…5), as in other submarine canyon systems worldwide, which indicates a complex history of canyon cut-and-fill development, including erosion, infilling, migration and merging (Mayall et al 2006;McHargue et al 2011;He et al 2012). The formation history of these buried channels is very long, with some of them even predating the 16.5 Ma sequence boundary (Fig.…”

Section: Sedimentary Structuresmentioning

confidence: 88%

Morphotectonics and evolutionary controls on the Pearl River Canyon system, South China Sea

Ding

Li³

et al. 2013

Mar Geophys Res

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The Pearl River Canyon system is a typical canyon system on the northern continental slope of the South China Sea, which has significant implications for hydrocarbon exploration. Through swath bathymetry in the canyon area combined with different types of seismic data, we have studied the morphotectonics and controlling factors of the canyon by analyzing its morphology and sedimentary structure, as well as the main features of the continental slope around the canyon. Results show that the Pearl River Canyon can be separated into three segments with different orientations. The upper reach is NW-oriented with a shallowly incised course, whereas the middle and lower reaches, that are located mainly in the Baiyun Sag, have a broad U-shape and have experienced consistent deposition. Seventeen deeply-cut canyons have developed in the slope north of the Baiyun Sag, playing an important role in the sedimentary processes of the middle and lower reaches of the Pearl River Canyon. These canyons display both asymmetrical V-and U-shapes along their lengths. Numerous buried channels can be identified below the modern canyons with unidirectionally migrating stacking patterns, suggesting that the canyons have experienced a cyclic evolution with several cut and fill phases of varying magnitude. These long established canyons, rather than the upper reach of the Pearl River Canyon, are the main conduits for the transport of terrigenous materials to the lower slope and abyssal basin during lowstand stage, and have contributed to the formation of vertically stacked deep-water fans in the middle reach. Canyon morphology is interpreted as a result of erosive sediment flows. The Pearl River Canyon and the 17 canyons in the slope area north of the Baiyun Sag probably have developed since the Miocene. Cenozoic tectonics, sea level change and sediment supply jointly control the morphology and sedimentary structure. The middle and lower reaches of the Pearl River Canyon developed on the paleo-terrain of the Baiyun Sag, which has been a persistently rapid depositional environment, receiving most of the materials transported via the canyons.

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Turbidite channel reservoirs—Key elements in facies prediction and effective development

Cited by 369 publications

References 62 publications

Turbidite and conglomerate successions in an Ordovician back-arc basin, Mid-Norwegian Caledonides: a result of long-term staging followed by catastrophic release of sediments

Turbidite and conglomerate successions in an Ordovician back-arc basin, Mid-Norwegian Caledonides: a result of long-term staging followed by catastrophic release of sediments

Development of cutoff-related knickpoints during early evolution of submarine channels

Morphotectonics and evolutionary controls on the Pearl River Canyon system, South China Sea

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