Controls on fluviolacustrine reservoir distribution and architecture in passive salt-diapir provinces: Insights from outcrop analogs

Matthews, Wendy J.; Hampson, Gary J.; Trudgill, Bruce D.; Underhill, John R.

doi:10.1306/05310706123

Cited by 53 publications

(118 citation statements)

References 37 publications

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“…The Late Permian Zechstein salt controlled strongly the deposition by forming salt withdrawal mini basins due to a combination of localised loading and structural extension (Smith et al, 1993;Bishop, 1996;Matthews et al, 2007) within an overall rift controlled basin. The Smith Bank sediments represent the bulk and basal part of the pod infill, whereas the overlying Skagerrak is found as intra-pod sediments in the upper parts of the pods and as inter-pod sediments between the pods.…”

Section: Triassic Skagerrak Formation Stratigraphymentioning

confidence: 99%

Exceptional reservoir quality in HPHT reservoir settings: Examples from the Skagerrak Formation of the Heron Cluster, North Sea, UK

Stricker

Jones

Sathar

et al. 2016

Marine and Petroleum Geology

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(2016) 'Exceptional reservoir quality in HPHT reservoir settings : examples from the Skagerrak Formation of the Heron Cluster, UK, North Sea.', Marine and petroleum geology., 77 . pp. 198-215. Further information on publisher's website: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. cementation and has had little to no effect on porosity preservation. The formation of welldeveloped authigenic chlorite (>70% surface coating) and, to a lesser extent illite clay coats with burial had a positive effect on porosity preservation even though permeability was marginally reduced in the illite-rich sandstones. A schematic porosity and quartz cement evolution model has been developed which allows for pre-drill prediction of reservoir quality in the Heron Cluster and provide valuable insights for other complex high-pressure hightemperature reservoirs.

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Section: Triassic Skagerrak Formation Stratigraphymentioning

confidence: 99%

Exceptional reservoir quality in HPHT reservoir settings: Examples from the Skagerrak Formation of the Heron Cluster, North Sea, UK

Stricker

Jones

Sathar

et al. 2016

Marine and Petroleum Geology

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“…The Skagerrak sediments accumulated in a series of fault-and salt-controlled mini-basins, or pods, within the overall rift basin (Smith et al 1993;Matthews et al 2007). The thick Zechstein salt, of late Permian age, strongly influenced sedimentation by forming withdrawal basins due to a combination of localized loading and structural extension (Smith et al 1993;Bishop 1996;Matthews et al 2007).…”

Section: Triassic Skagerrak Stratigraphymentioning

confidence: 99%

Enhanced porosity preservation by pore fluid overpressure and chlorite grain coatings in the Triassic Skagerrak, Central Graben, North Sea, UK

Stricker¹,

Jones²

2016

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Current understanding of porosity preservation in deeply buried sandstone reservoirs tends to be focused on how diagenetic grain coatings of clay minerals and microquartz can inhibit macroquartz cementation. However, the importance of overpressure developed during initial (shallow) burial in maintaining high primary porosity during subsequent burial has generally not been appreciated. Where pore fluid pressures are high, and the vertical effective stress is low, the shallow arrest of compaction can allow preservation of high porosity and permeability at depths normally considered uneconomic. The deeply buried fluvial sandstone reservoirs of the Triassic Skagerrak Formation in the Central Graben, North Sea, show anomalously high porosities at depths greater than 3500 metres below sea floor (mbsf). Pore pressures can exceed 80 MPa in the upper part of the Skagerrak Formation at depths of 4000-5000 mbsf, where temperatures are above 1408C. The Skagerrak reservoirs commonly have high primary porosities of up to 35%, little macroquartz cement and variable amounts of diagenetic chlorite grain coats. This research sheds light on the complex controls on reservoir quality in the fluvial sandstones of the Skagerrak Formation by identifying the role of shallow overpressure in arresting mechanical compaction and the importance of chlorite detrital grain coatings in inhibiting macroquartz cement overgrowth as temperature increases during progressive burial.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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“…The Triassic sediments accumulated in a series of salt walled mini-basins, or pods, within the overall rift controlled basin (Matthews et al, 2007;Smith et al, 1993). The thick Permian Zechstein salt in the Late Permian exerted a significant control on sedimentation in the Late Permian by forming salt withdrawal minibasins as a result of a combination of salt dissolution, sediment loading, regional evacuation and structural extension (e.g.…”

Section: Skagerrak Stratigraphymentioning

confidence: 99%

“…The thick Permian Zechstein salt in the Late Permian exerted a significant control on sedimentation in the Late Permian by forming salt withdrawal minibasins as a result of a combination of salt dissolution, sediment loading, regional evacuation and structural extension (e.g. (Bishop, 1996;Matthews et al, 2007;McKie, 2014;Smith et al, 1993). The Smith Bank Formation,6 representing the basal part of the pod fills, was deposited in lacustrine and playa settings (Stricker et al, 2016a).…”

Section: Skagerrak Stratigraphymentioning

confidence: 99%

The role played by carbonate cementation in controlling reservoir quality of the Triassic Skagerrak Formation, Norway

Cui

Jones

Saville

et al. 2017

Marine and Petroleum Geology

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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Controls on fluviolacustrine reservoir distribution and architecture in passive salt-diapir provinces: Insights from outcrop analogs

Cited by 53 publications

References 37 publications

Exceptional reservoir quality in HPHT reservoir settings: Examples from the Skagerrak Formation of the Heron Cluster, North Sea, UK

Exceptional reservoir quality in HPHT reservoir settings: Examples from the Skagerrak Formation of the Heron Cluster, North Sea, UK

Enhanced porosity preservation by pore fluid overpressure and chlorite grain coatings in the Triassic Skagerrak, Central Graben, North Sea, UK

The role played by carbonate cementation in controlling reservoir quality of the Triassic Skagerrak Formation, Norway

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