The thermal regime of the Northeastern-German Basin from 2-D inversion

Vosteen, Hans-Dieter; Rath, Volker; Schmidt-Mumm, A.; Clauser, Christoph

doi:10.1016/j.tecto.2004.05.004

Cited by 19 publications

(10 citation statements)

References 18 publications

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“…A broad range of scientific issues was examined, with special emphasis on the analysis of the present day thermal structure (e.g. Scheck, 1997;Bayer et al, 1997;Ondrak et al, 1999;Vosteen et al, 2004;Norden et al, 2008;Noack et al, 2010;Norden et al, 2012;P. Balling et al, 2013;Sippel et al, 2013;Scheck-Wenderoth et al, 2014), thermal maturity studies (e.g.…”

Section: Previous Modelling Studiesmentioning

confidence: 99%

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 2: A case study from the Danish-German border region

Fuchs

Balling

2016

Geothermics

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Highlights 3D steady-state thermal FE model using Feflow  Well-log based parameterization approach  Spatial parameterization of rock thermal conductivity  New heat-flow data  North German Basin (Danish-German border area) ABSTRACT We present a 3D numerical crustal temperature model and analyse the present-day conductive thermal field of the Danish-German border region. The model region covers the northernmost part of the North German Basin, a transition zone between the deep-reaching sedimentary rocks of the Glückstadt Graben (including complex salt structures) and the shallow crystalline basement of the Ringkøbing-Fyn High. The modelling approach is novel as it implements for the first time a comprehensive analysis of well-log data on a regional modelling scale. Those logs were used both to derive the spatial distribution of rock thermal conductivity across the study area, and to calculate heat flow values. New values of terrestrial surface heat flow are reported for eight deep boreholes in the North German Basin ranging from 72 to 84 mW/m² with a mean of 80 ± 5 mW/m². The values are computed from continuous temperature logs, carefully corrected BHT values, drill-stem tests and well-log derived rock thermal properties (thermal conductivity, radiogenic heat production) and were included in the setup of the numerical lower boundary conditions. New surface heat flow is up to 20 mW/m² higher than low values reported in some previous studies for this region. Heat flow from the mantle is 33 to 40 mW/m². The model temperature predictions are validated against 59 temperature observations from 24 wells. The prediction uncertainties between observed and modelled temperatures at deep borehole sites are small (rms = 3.5 °C, ame = 2.1 °C). Pronounced lateral temperature variations are predicted and found to be caused mainly by complex geological structures, including a large amount of salt structures and marked lateral variations in the thickness of basin sediments. The associated variations in rock thermal conductivity generate significant variations in model heat flow and large variations in temperature gradients.With regard to the utilization of geothermal energy, the Rhaetian and the Middle Buntsandstein sandstone reservoirs are found with temperatures within the range of 40-80 °C, suitable for low enthalpy heating purposes, in most of the area and locally also with higher temperatures.Temperatures above 120 °C, of interest for the production of electricity, are observed only in the very southeastern part of the study area.

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Section: Previous Modelling Studiesmentioning

confidence: 99%

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 2: A case study from the Danish-German border region

Fuchs

Balling

2016

Geothermics

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“…The general importance of calibrating numerical models for heat transfer problems is widely known and different techniques has been applied in the past (e.g. Wang, 1989;Shen et al, 1990;Vosteen et al, 2004;Rath et al, 2006). In model runs of the present study, where initial rock TC is calibrated by implementing temperature observations, (constraining method), the FEFLOW Parameter estimation program FePest ® is used.…”

Section: Model Set Up Workflow and Governing Equationsmentioning

confidence: 99%

“…It has also to be considered that, despite of some rare studies (e.g. Vosteen et al, 2004), the majority of heat-transfer studies has not been calibrated to real observations. A quantification of the fit between modelled and measured temperatures is presented only in a few studies.…”

Section: Introductionmentioning

confidence: 99%

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 1: Uncertainty analysis of the thermal-conductivity parameterization

Fuchs

Balling

2016

Geothermics

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“…The thermal regime is of considerable interest with respect to both basin formation and geothermal energy production. Laboratory data can be very useful for thermal regime modelling (Vosteen et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Analysis of thermal parameters of Triassic, Permian and Carboniferous sedimentary rocks in central Poland

Sowiżdżał

Kaczmarczyk

2014

Geological Journal

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The paper shows thermal tests results (thermal conductivity, specific heat) carried out during the research project to recognize the potential of hot dry rocks for heat and electricity production in Poland. Analysis of such parameters of the rock medium has fundamental significance in search of structures for location of enhanced geothermal systems (EGS). Analyses of thermal conductivity as well as specific heat determine the possibility of effective extraction of heat from hot rock formations and its efficient transfer to the land surface. Reservoir rock should be characterized by the lowest possible porosity and permeability, and the highest possible thermal conductivity. In order to recognize reservoir parameters of rocks that form potential reservoirs for EGS, 300 samples of sedimentary rocks were taken from 11 wells located in central Poland. For samples, sizes of which enabled measurement of thermal parameters, tests of thermal conductivity and specific heat were carried out. Independently, measurements of porosity were made. The porosity magnitude determines values of measured thermal parameters. Measurements of thermal conductivity of rocks were made for 24 samples collected from Triassic, Permian and Carboniferous deposits in six wells. Measurements of specific heat on rock samples were made for 20 rock samples. Among sedimentary rocks, principally sandstones and limestones with reservoir parameters favourable for this type of systems are considered to be petrogeothermal reservoirs and are often characterized by favourable thermal parameters for EGS. Copyright © 2014 John Wiley & Sons, Ltd.

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The thermal regime of the Northeastern-German Basin from 2-D inversion

Cited by 19 publications

References 18 publications

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 2: A case study from the Danish-German border region

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 2: A case study from the Danish-German border region

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 1: Uncertainty analysis of the thermal-conductivity parameterization

Analysis of thermal parameters of Triassic, Permian and Carboniferous sedimentary rocks in central Poland

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