Articles

Geothermal exploration in a sedimentary basin: new continuous temperature data and physical rock properties from northern Oman

The lateral and vertical temperature distribution in Oman is so far only poorly understood, particularly in the area between Muscat and the Batinah coast, which is the area of this study and which is composed ...

Authors: Felina Schütz, Gerd Winterleitner and Ernst Huenges

Doped bentonitic grouts for implementing performances of low-enthalpy geothermal systems

Mechanical (flexural and uniaxial compressive strengths) and physical (thermal conductivity) properties of two new bentonitic grouts doped with 5 and 10% of graphite powder are discussed in this work and evalu...

Authors: Marco Viccaro

Geologic framework of the Fang Hot Springs area with emphasis on structure, hydrology, and geothermal development, Chiang Mai Province, northern Thailand

Geologic mapping, a magnetotelluric survey, well data, and earlier reports are integrated to guide further development of the Fang geothermal system. The Fang Hot Springs originally flowed ~ 20 l s⁻¹ of 90–99 °C ...

Authors: Spencer H. Wood, Pichet Kaewsomwang and Fongsaward Suvagonda Singharajwarapan

Matrix permeability of reservoir rocks, Ngatamariki geothermal field, Taupo Volcanic Zone, New Zealand

The Taupo Volcanic Zone (TVZ) hosts 23 geothermal fields, seven of which are currently utilised for power generation. Ngatamariki geothermal field (NGF) is one of the latest geothermal power generation develop...

Authors: J. L. Cant, P. A. Siratovich, J. W. Cole, M. C. Villeneuve and B. M. Kennedy

A numerical investigation of combined heat storage and extraction in deep geothermal reservoirs

Heat storage capabilities of deep sedimentary geothermal reservoirs are evaluated through numerical model simulations. We combine storage with heat extraction in a doublet well system when storage phases are r...

Authors: Márton Major, Søren Erbs Poulsen and Niels Balling

Effect of an 860-m thick, cold, freshwater aquifer on geothermal potential along the axis of the eastern Snake River Plain, Idaho

A 1912-m exploration corehole was drilled along the axis of the eastern Snake River Plain, Idaho. Two temperature logs run on the corehole display an obvious inflection point at about 960 m. Such behavior is i...

Authors: Thomas E. Lachmar, Thomas G. Freeman, Christopher J. Sant, Jeffrey R. Walker, Joseph F. Batir, John W. Shervais, James P. Evans, Dennis L. Nielson and David D. Blackwell

Analysis of geothermal energy as an alternative source for electricity in Colombia

Geothermal energy is the energy that is stored inside the earth and which may be used by man either directly (with no transformation) or to generate electricity by means of a geothermal power plant. This artic...

Authors: Samuel S. Salazar, Yecid Muñoz and Adalberto Ospino

Microstructural and petrophysical properties of the Permo-Triassic sandstones (Buntsandstein) from the Soultz-sous-Forêts geothermal site (France)

Geothermal projects in the Upper Rhine Graben aim to harness thermal anomalies that have arisen due to hydrothermal circulation within the granitic basement and the overlying Permo-Triassic sedimentary units. ...

Authors: Michael J. Heap, Alexandra R. L. Kushnir, H. Albert Gilg, Fabian B. Wadsworth, Thierry Reuschlé and Patrick Baud

The element-release mechanisms of two pyrite-bearing siliciclastic rocks from the North German Basin at temperatures up to 90 °C under oxic and anoxic conditions

Leaching tests with synthetic brines (25 g/L NaCl) between 25 °C and 90 °C were performed under oxic and anoxic conditions over 7 days on two pyrite-bearing siliciclastic rocks from the Lower Jurassic Hettangi...

Authors: Daniel Richard Müller and Simona Regenspurg

Predictability of properties of a fractured geothermal reservoir: the opportunities and limitations of an outcrop analogue study

Minimizing exploration risk in deep geothermics is of great economic importance. Especially, knowledge about temperature and permeability of the reservoir is essential. We test the potential of an outcrop anal...

Authors: Johanna F. Bauer, Michael Krumbholz, Silke Meier and David C. Tanner

Correction to: Flow-through experiments on the interaction of sandstone with Ba-rich fluids at geothermal conditions

After publication of the article (Orywall et al. 2017), it has been brought to our attention that there are a number of errors. The authors have listed them below.

Authors: Pia Orywall, Kirsten Drüppel, Dietmar Kuhn, Thomas Kohl, Michael Zimmermann and Elisabeth Eiche

Numerical analysis for ground temperature variation

This paper aims to predict ground temperature variation with depth for time variant ambient air temperature and solar radiation data for Jamshedpur, India. Finite difference method has been used to discretise ...

Authors: Raviranjan Kumar Singh and Ram Vinoy Sharma

The new Geothermal Energy: Science, Society, and Technology

Authors: Olaf Kolditz, Luis Carlos Gutiérrez-Negrín, Ernst Huenges, Leslie Jakobs, Thomas Kohl and Inga Moeck

Flow-through experiments on the interaction of sandstone with Ba-rich fluids at geothermal conditions

It is commonly known that heat extraction and decompression can lead to mineral precipitation and reservoir clogging in geothermal systems. In the Upper Rhine Graben, the precipitating minerals are mainly bari...

Authors: Pia Orywall, Kirsten Drüppel, Dietmar Kuhn, Thomas Kohl, Michael Zimmermann and Elisabeth Eiche

Concepts of modeling surface energy anisotropy in phase-field approaches

To simulate the growth of geological veins, it is necessary to model the crystal shape anisotropy. Two different models, classical and natural models, which incorporate the surface energy anisotropy into the obje...

Authors: Oleg Tschukin, Alexander Silberzahn, Michael Selzer, Prince G. K. Amos, Daniel Schneider and Britta Nestler

Workshop “Geothermal fluids in saline systems”

Earth’s crust offers a vast resource of heat that can be used and converted into energy both for electricity and heating/cooling purposes. The utilization of this geothermal energy can make an important contri...

Authors: Simona Regenspurg and Thorsten Schäfer

Performance of geothermal power plants (single, dual, and binary) to compensate for LHC-CERN power consumption: comparative study

The aim of this study is to compare between single flash, dual flash, and binary power plants in terms of the power generated, their performance, and the related cost. The results from the comparison are used ...

Authors: M. El Haj Assad, E. Bani-Hani and M. Khalil

Utilizing supercritical geothermal systems: a review of past ventures and ongoing research activities

Supercritical geothermal systems are very high-temperature geothermal systems that are located at depths near or below the brittle–ductile transition zone in the crust where the reservoir fluid is assumed to b...

Authors: Thomas Reinsch, Patrick Dobson, Hiroshi Asanuma, Ernst Huenges, Flavio Poletto and Bernard Sanjuan

Computational modeling of calcite cementation in saline limestone aquifers: a phase-field study

The present article investigates the effect of initial grain size on the overall growth kinetics during calcite cementation from supersaturated geothermal fluid whilst tracking the grain boundary behavior of t...

Authors: Nishant Prajapati, Michael Selzer and Britta Nestler

Development of an updated geothermal reservoir conceptual model for NW Sabalan geothermal field, Iran

In this paper, a conceptual model has been developed for NW Sabalan geothermal field using exploration indicators. These indicators include the data and results of subsurface and surface investigations compris...

Authors: Mirmahdi Seyedrahimi-Niaraq, Faramarz Doulati Ardejani, Younes Noorollahi and Soheil Porkhial

Numerical analysis of downhole heat exchanger designed for geothermal energy production

A traditional way of geothermal energy production implies hot brine extraction from the reservoir to a surface facility. This method is economically profitable only for high enthalpy reservoirs associated with...

Authors: I. Akhmadullin and M. Tyagi

Assessment of performance and parameter sensitivity of multicomponent geothermometry applied to a medium enthalpy geothermal system

The determination of reservoir temperatures represents a major task when exploring geothermal systems. Since the uncertainties of classical solute geothermometry are still preventing reliable reservoir tempera...

Authors: Fabian Nitschke, Sebastian Held, Ignacio Villalon, Thomas Neumann and Thomas Kohl

Copper precipitation as consequence of steel corrosion in a flow-through experiment mimicking a geothermal production well

Decreasing production rates and massive precipitation of native copper (Cu(0)) were observed in the production well at the geothermal research facility Groß Schönebeck (Germany). The Cu precipitates filling up...

Authors: Simona Regenspurg, Ives Geigenmüller, Harald Milsch and Michael Kühn

Damage event analysis of vertical ground source heat pump systems in Germany

In recent years, some spectacular cases of damage occurred with vertical ground source heat pump (GSHP) systems in Germany. Broad media coverage attracted enormous public attention, with reports about land sub...

Authors: Paul Fleuchaus and Philipp Blum

How well suited are current thermodynamic models to predict or interpret the composition of (Ba,Sr)SO₄ solid-solutions in geothermal scalings?

In this study, we report results of the analysis of a particularly interesting scaling sample from the geothermal plant in Neustadt-Glewe in northern Germany, which contained 19% Galena (PbS) and 81% of a hete...

Authors: Frank Heberling, Dieter Schild, Detlev Degering and Thorsten Schäfer