Tertiary deep-marine reservoirs of the North Sea region: an introduction

McKie, Tom; Rose, P. T. S.; Hartley, Adrian J.; Jones, David; Armstrong, T. L.

doi:10.1144/sp403.12

Cited by 17 publications

(9 citation statements)

References 95 publications

(100 reference statements)

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“…Galy et al, 2007;Saller et al, 2008;Hodgson, 2009;Gwiazda et al, 2015) , and buried systems form reservoirs for groundwater and hydrocarbons, as well as economic accumulations of minerals (e.g. Pettingill, 1998;Ruffell et al, 1998;Weimer et al, 2000;McKie et al, 2015). Consequently, understanding the distribution of depositional facies and their porosity and permeability is key to understanding the distribution and stability of subsurface fluids and minerals (Lien et al, 2006;Porten et al, 2016;Southern et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Spatial variability in depositional reservoir quality of deep-water channel-fill and lobe deposits

Bell

Kane

Pontén

et al. 2018

Marine and Petroleum Geology

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Section: Introductionmentioning

confidence: 99%

Spatial variability in depositional reservoir quality of deep-water channel-fill and lobe deposits

Bell

Kane

Pontén

et al. 2018

Marine and Petroleum Geology

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“…In previous studies, unconfined deposits and terminal lobes or terminal splays have been described for the terminal sector of terminal fluvial‐fan systems (e.g. Fisher et al ., ; McKie et al ., ; Lowe & Arnott, ). However, neither their internal anatomy nor their relations with other elements has previously been studied in detail.…”

Section: Discussionmentioning

confidence: 99%

“…C), it appears that they most likely record an upward increase in the energy of the flows. This, together with the upward increase in lobe‐element thickness, can be interpreted as evidence of terminal lobe progradation (Weissmann et al ., ; McKie et al ., ).…”

Section: Architectural Elementsmentioning

confidence: 97%

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Anatomy and facies distribution of terminal lobes in ephemeral fluvial successions: Jurassic Tordillo Formation, Neuquén Basin, Argentina

et al. 2020

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In terminal fluvial‐fan systems, characteristic proximal to distal variations in sedimentary architectures are recognized to arise from progressive downstream loss of water discharge related to both infiltration and evaporation. This work aims to elucidate downstream trends in facies and architecture across the medial and distal zones of terminal‐fan systems, which record transitions from deposits of channel elements to lobe‐like and sheet‐like elements. This is achieved via a detailed characterization of ancient ephemeral fluvial deposits of the well‐exposed Kimmeridgian Tordillo Formation (Neuquén Basin, Argentina). The fine sand‐prone and silt‐prone succession associated with the medial to distal sectors of the system has been studied to understand relationships between depositional processes and resulting architectures. Facies and architectural‐element analyses, and quantification of resulting sedimentological data at multiple scales, have been undertaken to characterize sedimentary facies, facies transitions, bed types, architectural elements and larger‐scale architectural styles. Eight bed types with distinct internal facies transitions are defined and interpreted in terms of different types of flood events. Channelized and non‐channelized architectural elements are defined based on their constituent bed types and their external geometry. The most common elements are terminal lobes, which are composite bodies within which largely unconfined sandy deposits are stacked in a compensational manner; a hierarchical arrangement of internal components is recognized. Proximal feeder‐channel avulsion events likely controlled the evolution of terminal‐lobe elements and their spatiotemporal shifts. Stratigraphic relations between architectural elements record system‐wide trends, whereby a proximal sector dominated by channel elements passes downstream via a gradational transition to a medial sector dominated by sandy terminal‐lobe elements, which in turn passes further downstream to a distal sector dominated by silty terminal lobe‐margin and fringing deposits. This work enhances current understanding of the stratigraphic record of terminal fluvial systems at multiple scales, and provides insight that can be applied to predict the facies and architectural complexity of terminal fluvial successions.

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“…However, the presence of thick Upper Cretaceous chalk and the low impedance contrasts between Cromer Knoll shales and sandstones renders seismic imaging of any relatively thin (typically less than 30 m) Lower Cretaceous sandstone reservoir problematic. To do so requires good quality 3D seismic data combined with an understanding of the likely depositional systems to be encountered (Crittenden et al 1998;Law et al 2000;McKie et al 2015). With such data available, sedimentary systems such as deep marine fans may be traceable on time slice amplitude maps (e.g.…”

Section: Potential Methods For Further Detailed Reservoir Interpretationmentioning

confidence: 99%

Lower Cretaceous reservoir development in the North Sea Central Graben, and potential analogue settings in the Southern Permian Basin and South Viking Graben

Zwaan

2018

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Much of the future hydrocarbon exploration potential in the North Sea lies in locating stratigraphic traps and discrete reservoir intervals. This study assesses the potential for Lower Cretaceous reservoirs, with particular focus on the Norwegian Central Graben and proposed methods to identify future prospects over a wider area. Seismic interpretation and well data reveal the structure and sedimentology of the study area. Although the region was isolated from a large hinterland in the Early Cretaceous, potential local sediment sources, sediment transport routes and areas with possible reservoir development are identified. The greater Mandal High area, where Lower Cretaceous shoreface deposits and submarine fan systems are postulated, is suggested for primary focus. Similar deposits may have developed around the other exposed highs in the region, although several were drowned towards the end of the Early Cretaceous. Detailed seismic and stratigraphic analysis will be necessary to identify individual reservoir units. Since similar settings may have occurred in the adjacent South Viking Graben and Southern Permian Basin regions during the Early Cretaceous, further reservoir assessment is recommended for the North Sea in general.

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Tertiary deep-marine reservoirs of the North Sea region: an introduction

Cited by 17 publications

References 95 publications

Spatial variability in depositional reservoir quality of deep-water channel-fill and lobe deposits

Spatial variability in depositional reservoir quality of deep-water channel-fill and lobe deposits

Anatomy and facies distribution of terminal lobes in ephemeral fluvial successions: Jurassic Tordillo Formation, Neuquén Basin, Argentina

Lower Cretaceous reservoir development in the North Sea Central Graben, and potential analogue settings in the Southern Permian Basin and South Viking Graben

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