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Glenelg Field

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Journal Article

A field guide to the Glenelg-Attadale Inlier, NW Scotland, with emphasis on the Precambrian high-pressure metamorphic history and subsequent retrogression

Craig Storey
Published: 01 April 2008
Scottish Journal of Geology (2008) 44 (1): 17–34.
DOI: https://doi.org/10.1144/sjg44010017
..., Palaeoproterozoic and Mesoproterozoic, and also within a range of lithologies, and is a useful natural laboratory. Fig. 1. Generalized geological map of the Glenelg-Attadale Inlier with locations of excursions 1 to 5 marked. This field guide includes localities that will give insight into a broad...
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View PDF for article title, A <span class="search-highlight">field</span> guide to the <span class="search-highlight">Glenelg</span>-Attadale Inlier, NW Scotland, with emphasis on the Precambrian high-pressure metamorphic history and subsequent retrogression
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Image
Figure 1. Location of Glenelg Field along terminal Missisauga shelf-edge trend, offshore Nova Scotia. Thick gray line indicates where shelf edge is clearly imaged in seismic data; hachured zone indicates where it is inferred based on well-log and core data. Along western rim of subbasin (Figs. 2A, 2B), O Marker shelf edge is ∼10 km north of terminal Missisauga shelf edge

Figure 1. Location of Glenelg Field along terminal Missisauga shelf-edge tr...

Published: 01 April 2006
Figure 1. Location of Glenelg Field along terminal Missisauga shelf-edge trend, offshore Nova Scotia. Thick gray line indicates where shelf edge is clearly imaged in seismic data; hachured zone indicates where it is inferred based on well-log and core data. Along western rim of subbasin ( Figs. 2A
Image
Interpreted strike-oblique(?) stratigraphic cross-section, Glenelg Field. Lithostratigraphic picks are from MacLean and Wade (1993), except for Glenelg H-38. Biostratigraphic picks for the Glenelg J-48 well are from Ascoli (1990). Cored intervals are indicated by black bars.

Interpreted strike-oblique(?) stratigraphic cross-section, Glenelg Field. L...

Published: 01 September 2005
Fig. 11. Interpreted strike-oblique(?) stratigraphic cross-section, Glenelg Field. Lithostratigraphic picks are from MacLean and Wade (1993) , except for Glenelg H-38. Biostratigraphic picks for the Glenelg J-48 well are from Ascoli (1990) . Cored intervals are indicated by black bars.
Journal Article

Tidal signatures in a shelf-margin delta

Don I. Cummings, R. William C. Arnott, Bruce S. Hart
Journal: Geology
Published: 01 April 2006
Geology (2006) 34 (4): 249–252.
DOI: https://doi.org/10.1130/G22078.1
...Figure 1. Location of Glenelg Field along terminal Missisauga shelf-edge trend, offshore Nova Scotia. Thick gray line indicates where shelf edge is clearly imaged in seismic data; hachured zone indicates where it is inferred based on well-log and core data. Along western rim of subbasin ( Figs. 2A...
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Image
Schematic burial history curves for Thebaud and Glenelg fields showing preferred interpretation of entrapment temperatures of fluid inclusions. Dashed lines show isotherms for an Early Cretaceous geothermal gradient of 40°C/km with a sea-floor temperature of 30°C and a modern geothermal gradient of 30°C/km with a sea-floor temperature of 5°C (cf. Figure 7); the postulated thermal event discussed in the text would have modified these isotherms. Black arrows show inferred burial history of sandstones with quartz and carbonate cements; numbers are the mean estimated entrapment temperature; mean salinity is color coded. V = age of volcanism in the Orpheus graben and southwest Grand Banks. For stage names, see Figure 1B.

Schematic burial history curves for Thebaud and Glenelg fields showing pref...

Published: 01 June 2012
Figure 10 Schematic burial history curves for Thebaud and Glenelg fields showing preferred interpretation of entrapment temperatures of fluid inclusions. Dashed lines show isotherms for an Early Cretaceous geothermal gradient of 40°C/km with a sea-floor temperature of 30°C and a modern geothermal
Journal Article

Early Cretaceous sediment failure in the southwestern Sable Subbasin, offshore Nova Scotia

David J. W. Piper, Georgia Pe-Piper, Stephen C. Ingram
Journal: AAPG Bulletin
Published: 01 July 2004
AAPG Bulletin (2004) 88 (7): 991–1006.
DOI: https://doi.org/10.1306/01290403120
...David J. W. Piper; Georgia Pe-Piper; Stephen C. Ingram Abstract Conventional cores from Lower Cretaceous outer-shelf and upper-slope prodelta facies in the Alma and Glenelg fields of the Scotian Basin show a wide range of synsedimentary deformation. Storm-dominated prodelta sandstone and mudstone...
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View PDF for article title, Early Cretaceous sediment failure in the southwestern Sable Subbasin, offshore Nova Scotia
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Selected facies from the Upper Member of the Missisauga Formation in the Glenelg Field: (a) tidal rhythmites (Facies 2 – interpretation: prodelta mud-stone; Glenelg E-58A, core 7, box 3); (b to e) various features of Facies 8 (tidally-influenced fluvial deposits), including (b) mudstone intraclasts (Facies 8, Glenelg N-49, 3651.0 m MD), (c) thick double mudstone drapes (Facies 8, Glenelg N-49, 3653.55 m MD), (d) a Diplocraterion burrow (Facies 8, Glenelg N-49, 3632.50 m MD), and (e) a sharp-based, upward-fining motif (Facies 8, Glenelg N-49, 3652.5–3644.0 m MD).

Selected facies from the Upper Member of the Missisauga Formation in the Gl...

Published: 01 September 2005
Fig. 12. Selected facies from the Upper Member of the Missisauga Formation in the Glenelg Field: (a) tidal rhythmites (Facies 2 – interpretation: prodelta mud-stone; Glenelg E-58A, core 7, box 3); (b to e) various features of Facies 8 (tidally-influenced fluvial deposits), including (b) mudstone
Image
Depositional model for the Upper Member of the Missisauga Formation, Glenelg Field: (a) pre-existing embayment at shelf margin; (b) initial deltaic sedimentation is strongly tide-influenced; (c) further relative sea-level fall causes incision of delta plain; (d) estuarine sedimentation in incised valley during initial transgression is strongly tide-influenced; (e) valley fills, waves start to control estuarine geomorphology, and transgressive wave ravinement occurs; (f) all subsequent deltas are storm-wave dominated (main Glenelg reservoirs are storm-dominated delta-front sandstones (Facies 5)).

Depositional model for the Upper Member of the Missisauga Formation, Glenel...

Published: 01 September 2005
Fig. 13. Depositional model for the Upper Member of the Missisauga Formation, Glenelg Field: (a) pre-existing embayment at shelf margin; (b) initial deltaic sedimentation is strongly tide-influenced; (c) further relative sea-level fall causes incision of delta plain; (d) estuarine sedimentation
Image
Map of Scotian Basin (A) showing location of wells studied. Shale-out of O-marker is based on Wade and MacLean (1990). Insets of Alma field (B) and Glenelg field (B) show location of individual wells in relation to faults at the top of the Missisauga Formation and the inferred gas-water contacts (in gray) (modified after Canada-Nova Scotia Offshore Petroleum Board, 2000).

Map of Scotian Basin (A) showing location of wells studied. Shale-out of O-...

Published: 01 July 2004
Figure 1 Map of Scotian Basin (A) showing location of wells studied. Shale-out of O-marker is based on Wade and MacLean (1990) . Insets of Alma field (B) and Glenelg field (B) show location of individual wells in relation to faults at the top of the Missisauga Formation and the inferred gas
Image
Interpreted oblique-dip seismic cross-sections, Sable Subbasin. See Figure 1 for cross-section locations. A–A′ images the structure of the Venture Field; B–B′ the Glenelg Field; C–C′ the Alma Field; and D–D′ the low-accommodation edge of the subbasin west of Alma. Note that large-scale (&gt;several-hundred-metre relief) accretionary clinoform reflections are associated with the hydrocarbon-bearing intervals in each field, except for Glenelg (B–B′), where low signal-to-noise ratio hinders the resolution of stratigraphy at depth. Seismic lines used are PRX-GSI-83-1042 (A–A′), GSI-GSI-S98-217A and PRX-GSI-83-926 (B–B′), PRX-GSI-83-846C (C–C′), and GSI-GSI-PA99-110 (D–D′). Paper copies of all seismic lines are publicly available through the Canada-Nova Scotia Offshore Petroleum Board.

Interpreted oblique-dip seismic cross-sections, Sable Subbasin. See Figure ...

Published: 01 September 2005
Fig. 3. Interpreted oblique-dip seismic cross-sections, Sable Subbasin. See Figure 1 for cross-section locations. A–A′ images the structure of the Venture Field; B–B′ the Glenelg Field; C–C′ the Alma Field; and D–D′ the low-accommodation edge of the subbasin west of Alma. Note that large-scale
Image
Interpreted oblique-dip seismic cross-sections, Sable Subbasin. See Figure 1 for cross-section locations. A–A′ images the structure of the Venture Field; B–B′ the Glenelg Field; C–C′ the Alma Field; and D–D′ the low-accommodation edge of the subbasin west of Alma. Note that large-scale (&gt;several-hundred-metre relief) accretionary clinoform reflections are associated with the hydrocarbon-bearing intervals in each field, except for Glenelg (B–B′), where low signal-to-noise ratio hinders the resolution of stratigraphy at depth. Seismic lines used are PRX-GSI-83-1042 (A–A′), GSI-GSI-S98-217A and PRX-GSI-83-926 (B–B′), PRX-GSI-83-846C (C–C′), and GSI-GSI-PA99-110 (D–D′). Paper copies of all seismic lines are publicly available through the Canada-Nova Scotia Offshore Petroleum Board.

Interpreted oblique-dip seismic cross-sections, Sable Subbasin. See Figure ...

Published: 01 September 2005
Fig. 3. Interpreted oblique-dip seismic cross-sections, Sable Subbasin. See Figure 1 for cross-section locations. A–A′ images the structure of the Venture Field; B–B′ the Glenelg Field; C–C′ the Alma Field; and D–D′ the low-accommodation edge of the subbasin west of Alma. Note that large-scale
Image
Authigenesis of titania in the context of the inferred diagenetic sequence of minerals in sandstones from the Glenelg field. Base diagram is simplified from Karim et al. (2010) to emphasize the setting of titania, using the diagenetic regimes of Morad et al. (2000), and inferred terrestrial alteration of detrital supply from Pe-Piper et al. (2005).

Authigenesis of titania in the context of the inferred diagenetic sequence ...

Published: 01 October 2011
F ig. 12.— Authigenesis of titania in the context of the inferred diagenetic sequence of minerals in sandstones from the Glenelg field. Base diagram is simplified from Karim et al. (2010) to emphasize the setting of titania, using the diagenetic regimes of Morad et al. (2000) , and inferred
Image
Figure 3. Tidal rhythmites from thick upward-coarsening prodelta–delta-front succession, Glenelg Field. Note stratigraphic position of thick upward-coarsening succession between mudstone-rich slope deposits and sandstone-rich shelf margin to outer-shelf deltaic deposits. Channel-form unit that truncates thick upward-coarsening succession is interpreted to be fluvially eroded, transgressively infilled incised-valley deposit (Cummings and Arnott, 2005). Small black flecks visible near top of core sample are disseminated sand-sized terrestrial organic debris. Note lack of bioturbation, which is typical of rhythmically laminated intervals. Similar rhythmite intervals occur sporadically in upward-coarsening succession at Glenelg E-58, and constitute most of top 10 m of upward-coarsening succession below incised valley at Glenelg N-49. Cored intervals are indicated by black bars. WRS—wave ravinement surface; SB—fluvially incised sequence boundary. Fine-grained nature of thick upward-coarsening succession relative to storm-dominated deltaic deposits higher in Missisauga Formation (i.e., main hydrocarbon reservoirs) might suggest that bedload convergence, a common phenomenon in modern tide-dominated estuaries (and by inference possibly also in tide-dominated deltas; see Dalrymple et al., 2003), occurred in topset of strongly tide-influenced shelf-margin delta, and consequently limited sand export to prodelta–delta-front clinoform. Fm—formation; Mb—member

Figure 3. Tidal rhythmites from thick upward-coarsening prodelta–delta-fron...

Published: 01 April 2006
Figure 3. Tidal rhythmites from thick upward-coarsening prodelta–delta-front succession, Glenelg Field. Note stratigraphic position of thick upward-coarsening succession between mudstone-rich slope deposits and sandstone-rich shelf margin to outer-shelf deltaic deposits. Channel-form unit
Image
Relationship of degree of quartz dissolution and barite and sphalerite cementation to sandstone facies and connectivity in the Glenelg field. Correlation diagram, systems tracts and facies from Karim et al. (2010). HST = highstand systems tract; LST = lowstand systems tract; RST = regressive systems tract; SB = erosive sequence boundary; WRS = wave ravinement surface. Facies (red numbers) after Gould et al. (2012): 0 = mudstone to sandstone prodeltaic turbidites; 2 = shelf sandstone and mudstone; 3 = poorly sorted transgressive muddy sandstones; 4 = fluvial and estuarine channel sandstones; 9 = sandy river-mouth turbidites.

Relationship of degree of quartz dissolution and barite and sphalerite ceme...

Published: 01 July 2015
Figure 17 Relationship of degree of quartz dissolution and barite and sphalerite cementation to sandstone facies and connectivity in the Glenelg field. Correlation diagram, systems tracts and facies from Karim et al. ( 2010 ). HST = highstand systems tract; LST = lowstand systems tract; RST
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(A) Location map showing the principal features of the Scotian Basin in the Early Cretaceous. The base map and basin isopachs are from Williams and Grant (1998). The limit of shelf-margin deltas is from Cummings et al. (2006b), Deptuck et al. (2009) and this study. The edge of the Upper Jurassic Abenaki bank is from Wade and MacLean (1990). Large gray arrows denote input points of principal rivers (from Pe-Piper et al., 2008). Al = Alma field; An = Annapolis G-24 well; G = Glenelg field; P = Peskowesk A-99 well; V = Venture field. (B) Cross section of the Scotian Basin from the Geological Survey of Canada deep seismic lines 86-5b and 89-1 (modified from Wade et al., 1995) also showing paleogeographic interpretation for the Early Cretaceous. K/T = top Cretaceous; top Miss. = top Missisauga Formation (top Barremian); top J = top Jurassic.

(A) Location map showing the principal features of the Scotian Basin in the...

Published: 01 January 2010
of the Upper Jurassic Abenaki bank is from Wade and MacLean (1990) . Large gray arrows denote input points of principal rivers (from Pe-Piper et al., 2008 ). Al = Alma field; An = Annapolis G-24 well; G = Glenelg field; P = Peskowesk A-99 well; V = Venture field. (B) Cross section of the Scotian Basin from
Journal Article

A comparative study of the Venture and Glenelg gas fields offshore Nova Scotia: implications for gas migration dynamics

M.A. Williamson, B.S. Mudford, C. Smyth
Published: 01 June 1991
Bulletin of Canadian Petroleum Geology (1991) 39 (2): 228.
DOI: https://doi.org/10.35767/gscpgbull.39.2.228
...M.A. Williamson; B.S. Mudford; C. Smyth A comparative study of the Venture and Glenelg gas fields yields some insight into their respective gas migration history. Gas accumulations at Venture are geopressured and are associated with rollover into major east-west faults. These faults do not extend...
View PDF for article title, A comparative study of the Venture and <span class="search-highlight">Glenelg</span> gas <span class="search-highlight">fields</span> offshore Nova Scotia: implications for gas migration dynamics
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Field photographs of lithologies of Glenelg gneiss and Morar Group. (a) Agmatitic texture in Western Glenelg gneiss, showing relic magma mixing of original felsic and mafic rocks. Glenelg village. Hammer 40 cm long. BGS Photo P707935. (b) Marble with calc-silicate nodules; Eastern Glenelg gneiss. North of Gleann Beag. BGS Photo P779470. (c) Layered mafic and felsic eclogite, folded; Eastern Glenelg gneiss. BGS Photo P779489. (d) Coarse psammite with trough cross-bedding, truncated by planar-bedded psammite, right-way-up. Barrisdale Psammite, Morar Group, central Knoydart (Mam Li). BGS Photo P779591. (e) Unconformity of thinly bedded psammite and semipelite (Morar Group) above intermediate gneiss (Western Glenelg gneiss), preserving angular relationship between bedding and gneissose fabric. Slisneach, NW Knoydart. BGS Photo P779573. (f) Coarse psammite with quartzo-feldspathic segregations and sigma-clast of deformed pegmatite. Migmatitic Morar Group, just east of Eastern Glenelg gneiss; NW of Beinn a’ Chuirn. BGS Photo P779499.

Field photographs of lithologies of Glenelg gneiss and Morar Group. ( a ) A...

Published: 21 November 2017
Fig. 5. Field photographs of lithologies of Glenelg gneiss and Morar Group. ( a ) Agmatitic texture in Western Glenelg gneiss, showing relic magma mixing of original felsic and mafic rocks. Glenelg village. Hammer 40 cm long. BGS Photo P707935. ( b ) Marble with calc-silicate nodules; Eastern
Image
A) Location map showing location of the study area, the Glenelg gas field, and basin isopachs for the Scotian Basin (from Williams and Grant 1998). B) Correlation of the upper Missisauga Formation in the Glenelg gas field (modified from Cummings and Arnott 2005 and Karim et al. 2010), showing location of studied conventional cores, presence of diagenetic titania, and location of titania illustrated in Figures 3 and 6. SB  =  sequence boundary; WRS  =  wave ravinement surface.

A) Location map showing location of the study area, the Glenelg gas field,...

Published: 01 October 2011
F ig. 1.— A) Location map showing location of the study area, the Glenelg gas field, and basin isopachs for the Scotian Basin (from Williams and Grant 1998 ). B) Correlation of the upper Missisauga Formation in the Glenelg gas field (modified from Cummings and Arnott 2005 and Karim et al
Journal Article

Growth-faulted shelf-margin deltas: a new (but old) play type, offshore Nova Scotia

Don I. Cummings, R. William C. Arnott
Published: 01 September 2005
Bulletin of Canadian Petroleum Geology (2005) 53 (3): 211–236.
DOI: https://doi.org/10.2113/53.3.211
...Fig. 11. Interpreted strike-oblique(?) stratigraphic cross-section, Glenelg Field. Lithostratigraphic picks are from MacLean and Wade (1993) , except for Glenelg H-38. Biostratigraphic picks for the Glenelg J-48 well are from Ascoli (1990) . Cored intervals are indicated by black bars. ...
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Book Chapter

The Elgin, Franklin, Glenelg and West Franklin fields, Blocks 22/30b, 22/30c, 29/4d, 29/5b and 29/5c, UK North Sea

Author(s)
A. D. Irving, K. F. Raphael, P. M. Rennison, R. Lewis, C. D. Cruickshank, R. A. Rengifo
Book: United Kingdom Oil and Gas Fields: 50th Anniversary Commemorative Volume
Series: Geological Society, London, Memoirs
Publisher: Geological Society of London
Published: 30 October 2020
DOI: 10.1144/M52-2018-47
EISBN: 9781786205070
... connected to a central process, utilities and quarters (PUQ) facility above the Elgin Field. Fig. 1. Location map of the Elgin, Franklin, Glenelg and West Franklin fields. This paper describes the petroleum geology of the Elgin and Franklin fields after more than a decade and a half...
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Abstract
View PDF for content titled, The Elgin, Franklin, <span class="search-highlight">Glenelg</span> and West Franklin <span class="search-highlight">fields</span>, Blocks 22&#x2F;30b, 22&#x2F;30c, 29&#x2F;4d, 29&#x2F;5b and 29&#x2F;5c, UK North Sea
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Abstract The Elgin, Franklin, Glenelg and West Franklin fields lie approximately 240 km (150 miles) east of Aberdeen in Blocks 22/30b, 22/30c, 29/4d, 29/5b and 29/5c of the UK Central Graben. Franklin was discovered in 1985, Elgin in 1991, Glenelg in 1999 and West Franklin in 2003. Elgin is a complex faulted anticline comprising four panels, while the others are simpler, tilted fault block structures. The main reservoir is the Upper Jurassic Fulmar Formation shoreface sandstone, although the Middle Jurassic Pentland and Triassic Skagerrak formations have also been produced on Franklin. Initial pressure was c. 1100 bar (16 000 psi), with a reservoir temperature of around 190°C (375°F). Production wells are drilled from four wellhead platforms; all connected to a central process, utilities and quarters facility above Elgin. Gas and condensate production started in 2001 from six wells on each of Elgin and Franklin, with the plateau being extended by satellite and infill wells. The project remains the world's largest high-pressure–high-temperature development, requiring continued innovations in geoscience, drilling, completion and operations. Cumulative production at end 2017 is 886 Mboe, with estimated ultimate recovery around 1300 Mboe.