Full‐wave long offset seismic imaging and velocity analysis with gravity and well constraints — a case study from NW Corrib, offshore Ireland

Droujinine, Alexander; Buckner, Steve; Cameron, Ross

doi:10.1190/1.2142228

Cited by 2 publications

(2 citation statements)

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“…These problems are most severe in the northern Slyne sub-basin and the western margin of the southern Slyne subbasin. The application of modern processing techniques and use of 3D seismic data have improved data quality in the region somewhat (Dancer and Pillar, 2001;Droujinine et al, 2005;Rohrman, 2007;Hardy et al, 2010), most recently with the acquisition of an ocean-bottom cable survey over the Corrib gas field in 2012 and 2013 (Shannon, 2018). Seismic sections are presented in European polarity (Brown, 2001), where a positive downwards increase in acoustic impedance corresponds to a positive (red) reflection event, and a decrease corresponds to a negative (blue) reflection event.…”

Section: Dataset and Methodologymentioning

confidence: 99%

Tectonostratigraphic evolution of the Slyne Basin

et al. 2022

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Abstract. The Slyne Basin, located offshore NW Ireland, is a narrow and elongated basin composed of a series of interconnected grabens and half-grabens, separated by transfer zones coincident with deep crustal structures formed during the Silurian- to Devonian-aged Caledonian Orogeny. The basin is the product of a complex, polyphase structural evolution stretching from the Permian to the Miocene. Initially, relatively low-strain rifting occurred in the Late Permian and again in the latest Triassic to Middle Jurassic, followed by a third phase of high-strain rifting during the Late Jurassic. These extensional events were punctuated by periods of tectonic quiescence during the Early Triassic and Middle Jurassic. Late Jurassic strain was primarily accommodated by several kilometres of slip on the basin-bounding faults, which formed through the breaching of relay ramps between left-stepping fault segments developed during earlier Permian and Early–Middle Jurassic rift phases. Following the cessation of rifting at the end of the Jurassic, the area experienced kilometre-scale uplift and erosion during the Early Cretaceous and a second, less severe phase of denudation during the Palaeocene. These post-rift events formed distinct regional post-rift unconformities and resulted in a reduced post-rift sedimentary section. The structural evolution of the Slyne Basin was influenced by pre-existing Caledonian structures at a high angle to the basinal trend. The basin illustrates a rarely documented style of fault reactivation in which basin-bounding faults are oblique to the earlier structural trend, but the initial fault segments are parallel to this trend. The result is a reversal of the sense of stepping of the initial fault segments generally associated with basement control on basin-bounding faults.

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Section: Dataset and Methodologymentioning

confidence: 99%

Tectonostratigraphic evolution of the Slyne Basin

et al. 2022

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“…These problems are most severe in the Northern Slyne Sub-basin, and the western margin of the Southern Slyne Sub-basin. The application of modern processing techniques and use of 3D seismic data has improved data quality in the region somewhat (Dancer & Pillar, 2001;Droujinine et al, 2005;Rohrman, 2007;Hardy et al, 2010), most recently with the acquisition of an ocean-bottom cable survey over the Corrib gas field in 2012 and 2013 (Shannon, 2018). Seismic sections are presented in European polarity (Brown, 2001), where a positive downwards increase in acoustic impedance corresponds to a positive (red) reflection event and a decrease corresponds to a negative (blue) reflection (Fugro, 1994a).…”

Section: Dataset and Methodologymentioning

confidence: 99%

Tectonostratigraphic evolution of the Slyne Basin

O’Sullivan

Childs

Saqab

et al. 2022

Preprint

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Abstract. The Slyne Basin, located offshore NW Ireland, is a narrow and elongate basin composed of a series of interconnected grabens and half-grabens, separated by transfer zones coincident with deep Caledonian-aged crustal structures. The basin is the product of a complex, polyphase structural evolution stretching from the Permian to the Miocene. Relatively low-strain episodic rifting occurred in the Late Permian and the latest Triassic to Middle Jurassic, with the main phase of rifting occurring in the Late Jurassic. These extensional events were punctuated by periods of tectonic quiescence during the Early Triassic, and regional uplift and erosion during the late Middle Jurassic. Late Jurassic strain was primarily accommodated by several kilometres of slip on the basin-bounding faults, which formed through the breaching of relay ramps between left-stepping fault segments developed during earlier Permian and Early-Mid Jurassic rift phases. Following the cessation of rifting at the end of the Jurassic, the area experienced kilometre-scale uplift and erosion during the Early Cretaceous and second, less-severe phase of denudation during the Palaeocene. These post-rift events formed a distinct regional post-rift unconformity and resulted in a reduced post-rift sedimentary section. The structural evolution of the Slyne Basin is influenced by pre-existing Caledonian structures at a high angle to the basinal trend. The basin illustrates a rarely documented style of fault reactivation in which basin-bounding faults are oblique to the earlier structural trend, but the initial fault segments are parallel to this trend. The result is a reversal of the sense of stepping of the initial fault segments generally associated with basement control on basin-bounding faults.

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Full‐wave long offset seismic imaging and velocity analysis with gravity and well constraints — a case study from NW Corrib, offshore Ireland

Cited by 2 publications

References 4 publications

Tectonostratigraphic evolution of the Slyne Basin

Tectonostratigraphic evolution of the Slyne Basin

Tectonostratigraphic evolution of the Slyne Basin

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