Thermal conductivity and diffusivity of fine-grained sedimentary rocks

Labus, Małgorzata; Labus, Krzysztof

doi:10.1007/s10973-018-7090-5

Cited by 74 publications

(23 citation statements)

References 19 publications

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“…x10 -6 m 2 s -1 . There are no published data on measured thermal diffusivities of the MMG, but these values are comparable to those reported by Labus and Labus (2018) on fine grained sedimentary rocks. The specific heats by mass range from 563 -1426 J K -1 kg -1 and the specific heats by volume range from 1.48 -3.19 MJ m -3 K -1 .…”

Section: Results Of the Gtb Core Analysessupporting

confidence: 59%

The thermal properties of the Mercia Mudstone Group

Parkes

Busby

Kemp

et al. 2020

QJEGH

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The Mercia Mudstone Group (MMG) crops out extensively across England and Wales and its thermal properties are required for the design of infrastructure such as ground source heating and cooling schemes and electrical cable conduits. Data from the literature and new data from a borehole core have been compiled to generate an updated range of thermal conductivities related to rock type and the lithostratigraphy. These indicate a total range in saturated vertical thermal conductivity of 1.67–3.24 W m−1 K−1, comprising 1.67–2.81 W m−1 K−1 for mudstones, 2.12–2.41 W m−1 K−1 for siltstones and 2.3–3.24 W m−1 K−1 for sandstones. These data are all from measurements on samples and there will be uncertainty when considering the thermal properties of the rock mass owing to micro- and macrostructural features. Geometric mean modelling of thermal conductivity based on mineralogy has overestimated the thermal conductivity. Correction factors for the modelled thermal conductivities have been calculated to allow a first estimate of MMG thermal conductivities when only mineralogical data are available. Measured thermal diffusivities from the borehole core were in the range of 0.63–3.07 × 10−6 m2 s−1 and are the first measured thermal diffusivities to be reported for the MMG.

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Section: Results Of the Gtb Core Analysessupporting

confidence: 59%

The thermal properties of the Mercia Mudstone Group

Parkes

Busby

Kemp

et al. 2020

QJEGH

View full text Add to dashboard Cite

show abstract

“…In the context of oil recovery, sand (unconsolidated) [1,2] and sandstone (consolidated) [4] reservoirs, which store large reserves of heavy and extra-heavy oil, have been exploited by using hot water injection. In these cases, the Peclet number can be determined using order-of-magnitude estimates as follows: the average thermal conductivity k m is, in both cases, in the order of 1 W/m K in a wide range of temperatures [20,21], meaning that the heat transfer from the water to the porous matrix is very efficient. The volumetric heat capacity of water (ρc) f is in the order of 1 MJ/(m 3 K) [22]).…”

Section: Analytical Modelmentioning

confidence: 99%

Temperature proﬁles due to continuous hot water injection into homogeneous ﬂuid-saturated porous media through a line source

Medina¹,

Higuera

Pliego

et al. 2021

Rev. Mex. Fís.

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We report a theoretical study to determine the temperature proﬁles due to the continuous andconstant injection of hot water through a line source, into a homogeneous ﬂuid-saturated porous medium which has had initially a constant temperature T∞. In our treatment we have taken in to account the simultaneous injection of constant ﬂuxes of volume ﬂuid, q, and of heat, φ. By using a far-ﬁeld description, we found similarity solutions for the dimensionless temperature depending on the Peclet number, P e, as the single parameter of the problem.

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“…Moreover, geothermal exploration has contributed to the understanding of subsurface temperature distribution in sedimentary basins [54][55][56]. In addition, thermal properties of different reservoir rocks, i.e., thermal conductivity, volumetric heat capacity, and thermal diffusivity, have been measured and described in, e.g., [57][58][59][60][61][62][63][64].…”

Section: Temperature Distribution and Geothermal Contextmentioning

confidence: 99%

Modeling, simulation, and optimization of geothermal energy production from hot sedimentary aquifers

et al. 2020

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Geothermal district heating development has been gaining momentum in Europe with numerous deep geothermal installations and projects currently under development. With the increasing density of geothermal wells, questions related to the optimal and sustainable reservoir exploitation become more and more important. A quantitative understanding of the complex thermo-hydraulic interaction between tightly deployed geothermal wells in heterogeneous temperature and permeability fields is key for a maximum sustainable use of geothermal resources. Motivated by the geological settings of the Upper Jurassic aquifer in the Greater Munich region, we develop a computational model based on finite element analysis and gradient-free optimization to simulate groundwater flow and heat transport in hot sedimentary aquifers, and numerically investigate the optimal positioning and spacing of multi-well systems. Based on our numerical simulations, net energy production from deep geothermal reservoirs in sedimentary basins by smart geothermal multi-well arrangements provides significant amounts of energy to meet heat demand in highly urbanized regions. Our results show that taking into account heterogeneous permeability structures and a variable reservoir temperature may drastically affect the results in the optimal configuration. We demonstrate that the proposed numerical framework is able to efficiently handle generic geometrical and geological configurations, and can be thus flexibly used in the context of multi-variable optimization problems. Hence, this numerical framework can be used to assess the extractable geothermal energy from heterogeneous deep geothermal reservoirs by the optimized deployment of smart multi-well systems. Keywords Porous and fractured geothermal reservoir modeling • Geothermal multi-well configurations • Finite element method • Thermo-hydraulic coupling • Optimization • Open-source software PACS 65M60 • 76S05 • 86-08 • 86A20 Publisher's note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Thermal conductivity and diffusivity of fine-grained sedimentary rocks

Cited by 74 publications

References 19 publications

The thermal properties of the Mercia Mudstone Group

The thermal properties of the Mercia Mudstone Group

Temperature proﬁles due to continuous hot water injection into homogeneous ﬂuid-saturated porous media through a line source

Modeling, simulation, and optimization of geothermal energy production from hot sedimentary aquifers

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