Assessment of the resource base for engineered geothermal systems in Great Britain

Busby, Jon; Terrington, R.L.

doi:10.1186/s40517-017-0066-z

Cited by 26 publications

(20 citation statements)

References 23 publications

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“…If the regional heat flow for Glasgow is taken as 60 mW m -2 (Browne et al 1987;Busby et al 2011) then ~46 mW m -2 of heat flow is escaping laterally into the workings below the base of this borehole. As discussed by Westaway & Younger (2013) and Busby & Terrington (2017), if the effect of palaeoclimate is accounted for then the regional surface heat flow for Glasgow may increase to ~80 mW m -2 , implying that ~66 mW m -2 is entering the mine workings at Hallside.…”

Section: Discussionmentioning

confidence: 93%

Digging deeper: The influence of historical mining on Glasgow's subsurface thermal state to inform geothermal research

Watson

Westaway

Burnside

2019

SJG

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Studies of the former northeast England coalfield in Tyneside demonstrated heat flow perturbations in boreholes to be due to the entrainment and lateral dispersion of heat from deeper in the subsurface through flooded mine workings. This work assesses the influence of historic mining on geothermal observations across Greater Glasgow. The regional heat flow for Glasgow is 60 mW m-2 and after correction for palaeoclimate is estimated as ~80 mW m-2. An example of reduced heat flow above mine workings is observed at Hallside (~10 km SE of Glasgow), where the heat flow through a 352 m deep borehole is ~14 mW m-2. Similarly, the heat flow across the 199 m deep GGC01 borehole in the Glasgow Geothermal Energy Research Field Site is ~44 mW m-2. The differences between these values and the expected regional heat flow suggests a significant component of horizontal heat flow into surrounding flooded mine workings. This deduction also

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Section: Discussionmentioning

confidence: 93%

Digging deeper: The influence of historical mining on Glasgow's subsurface thermal state to inform geothermal research

Watson

Westaway

Burnside

2019

SJG

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“…The assessment was done by using the Beardsmore Protocol (Beardsmore et al, 2010). The protocol recommends assessing the EGS potential from 3-10 km depth slice by creating the model of Basement-Sediment Interface and Basement rock (Busby and Terrington, 2017). The calculation then assisted by spatial statistics considering the data distribution and variogram modeling also kriging estimation to the depth target.…”

Section: Methodsmentioning

confidence: 99%

Applied Geostatistics to the Assessment of Enhanced Geothermal System (Egs) in Central Sumatera Basin

Sihotang

Alam

2019

buletin sdg

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Thick sediment (over 2,500 m), fractured basement and high thermal gradient (up to 19.10 C/100 m) of Central Sumatra Basin are suitable factors to have the Enhanced Geothermal System (EGS) potential. A number of 130 wells data were used to evaluate the EGS of the basin. The assessment is divided into the number of estimation within the grid cell (1x1 km) of sediment thickness, heat flow, thermal conductivity and technical potential calculated starting from basement-sediment layer interface. The distribution of heat flow and gradient thermal values correspond to the sediment layer. The autocorrelation test indicates the data is stationary. The variance of data gets bigger after a depth over 5.5 km. According to the Beardsmore protocol, the technical potential value ranged from 0.5 MW up to 4.7 MW at a depth of 3.5 km. In addition, the lowest technical potential is 0.66 MW and the highest is 5.76 MW at a depth of 4.5 km. The ordinary kriging, using the number of lags 10 in variogram modeling, estimated the technical potential distribution is higher to the southwest.

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“…The ISZ, that marks the contact between Avalonian and Laurentian lithospheres in Ireland, also delineates a surface heat flow contrast further afield (Figure ). Aside from a thin band of relatively high heat flow in Northern England, where rates of heat production up to 3.1 μW/m 2 are measured in granites down to 5 km (Busby & Terrington, ), the surface heat flow in Avalonian lithosphere ranges between 55 and 65 mW/m 2 after a paleoclimate correction from Majorowicz and Wybraniec (). This places England and Wales alongside the range of surface heat flow observed within the Leinster terrane in Ireland.…”

Section: Tectonic Implications Beyond Irelandmentioning

confidence: 99%

Probabilistic Surface Heat Flow Estimates Assimilating Paleoclimate History: New Implications for the Thermochemical Structure of Ireland

2018

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Regions where surface temperature has increased since past glaciation events, such as Ireland, underestimate the heat output of the Earth unless paleoclimate corrections are applied. We apply probabilistic techniques to quantify the uncertainty of 22 paleoclimate‐corrected heat flow estimates in Ireland, which assimilate multiple surface temperature histories associated with 130 ka of glacial oscillation in the British Isles. Heat flow values increase by ∼15 mW/m2 after a paleoclimate correction and provide new insights into the thermochemical structure of the lithosphere. The heat flow regime is broadly delineated by the Iapetus Suture Zone that separates Laurentian to the north and Avalonian terranes to the south (mean surface heat flow of 73 ± 14 and 65 ± 14 mW/m2, respectively). The degree to which heat‐producing elements are partitioned into the uppermost crust is described by the differentiation index of a heat flow province. From Bayesian inversion, we determine that radiogenic elements are substantially more differentiated in the uppermost crust of Laurentia (DI=2.8 ± 1.4) than Avalonia (DI=1.5 ± 1.3), despite a moderately enriched lower crust (0.8 ± 0.3 μW/m3). This is facilitated by a thin yet highly radiogenic layer in the uppermost crust of Laurentia (3.9 ± 1.8 μW/m3). Extrapolating these results across the British Isles and Newfoundland suggests that heat‐producing elements have been more successfully reworked into the upper crust to the north of the Iapetus Suture Zone during continental accretion between Laurentia and Avalonia.

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Assessment of the resource base for engineered geothermal systems in Great Britain

Cited by 26 publications

References 23 publications

Digging deeper: The influence of historical mining on Glasgow's subsurface thermal state to inform geothermal research

Digging deeper: The influence of historical mining on Glasgow's subsurface thermal state to inform geothermal research

Applied Geostatistics to the Assessment of Enhanced Geothermal System (Egs) in Central Sumatera Basin

Probabilistic Surface Heat Flow Estimates Assimilating Paleoclimate History: New Implications for the Thermochemical Structure of Ireland

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