The thermal state and geothermal energy accumulation mechanism in the Xiong’an New Area, China

Heiyu Lake zone of Daqing is located in the southwest hollow borderland of Heiyu Lake and on the arching transitional zone of Daqing placanticline. Based on the geological background of Heiyu Lake, this paper analyzes the landform, the regional geological structure, the formation lithology and the irruptive rock and other metallogenic conditions in detail. The indispensable geological conditions for forming geothermal field in layers were summed up. Combining with the development characteristics and geophysical data of formation, the bore hole site of geothermal well and target stratum were ascertained. The four major elements of forming geothermal resources in this region were confirmed by carrying out geothermal drilling.

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A WebGIS portal for exploration of deep geothermal energy based on geological and geophysical data

Geological Survey of Denmark and Greenland Bulletin ◽

10.34194/geusb.v35.4633 ◽

2016 ◽

Vol 35 ◽

pp. 23-26 ◽

Cited By ~ 2

Author(s):

Henrik Vosgerau ◽

Anders Mathiesen ◽

Morten Sparre Andersen ◽

Lars Ole Boldreel ◽

Morten Leth Hjuler ◽

...

Keyword(s):

Geothermal Energy ◽

District Heating ◽

Geophysical Data ◽

Heat Extraction ◽

Depth Interval ◽

Field Energy ◽

Geothermal Resources ◽

Geothermal Reservoirs ◽

Geological Conditions ◽

Deep Geothermal Energy

The Danish subsurface contains deep geothermal resources which may contribute for hundreds of years to the mixed Danish energy supply (Mathiesen et al. 2009). At present only a limited fraction of these resources are utilised in three existing geothermal power plants in Thisted, Margretheholm and Sønderborg (Fig. 1) where warm formation water is pumped to the surface from a production well and, after heat extraction, returned to the subsurface in injection wells (Fig. 2). Deep geothermal energy has the advantage of being a sustainable and environmentally friendly energy source which is furthermore independent of climate and seasonal variations, in contrast to wind and solar energy. The implementation of deep geothermal energy for district heating replacing conventional energy sources, especially coal and oil, may thus lead to a considerable reduction in the emission of greenhouse gases. There are therefore good reasons to include geothermal energy as a central component in Denmark’s future supply of energy for district heating. Furthermore, heat-demanding industries may consider the possibility to integrate geothermal energy and energy storage in their production process. In order to facilitate the use of geothermal energy, a broad majority in the Danish parliament has granted financial support for initiatives within the geothermal field (Energy policy agreement of March 22, 2012). The present paper deals with one of the outcomes of this agreement, namely a WebGIS portal with an overview of existing and interpreted geological and geophysical data. This will be relevant for all stakeholders in the exploration of deep geothermal resources in the Danish subsurface. The portal focuses on geothermal reservoirs within the 800–3000 m depth interval and provides an overview of the amount and quality of existing geodata, the geological composition of the subsurface, and interpreted thematic products such as geological maps of potential geothermal reservoirs. A comprehensive map from the portal showing onshore and nearoffshore locations where the geological conditions are potentially suitable for extraction of deep geothermal energy in Denmark is shown in Fig. 1. Many of the thematic maps are outcomes of the project The geothermal energy potential in Denmark – reservoir properties, temperature distribution and models for utilization under the programme Sustainable Energy and Environment funded by the Danish Agency for Science, Technology and Innovation.

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Temperature Distribution and Heat Flow Density Estimation in Geothermal Areas of Absheron Peninsula

International Journal of Terrestrial Heat Flow and Applications ◽

10.31214/ijthfa.v3i1.44 ◽

2020 ◽

Vol 3 (1) ◽

pp. 26-31

Author(s):

Aygun Vahid Mammadova

Keyword(s):

Heat Flow ◽

Geothermal Energy ◽

Geothermal Gradient ◽

Geothermal Field ◽

Flow Density ◽

Geothermal Resources ◽

Deep Wells ◽

Recoverable Resources ◽

Middle Pliocene

Geothermal field of the Pliocene complex in the Absheron peninsula, Azerbaijan have been examined on the basis of temperature distributions in over 50 deep wells. Data analysis include variations in geothermal gradient and distribution of heat flow within complexes of Absheron formation of upper Pliocene in age. Geothermal gradients are in the range of 17 to 25oC/km. The heat flow values are found to fall in the range of 50 to 80mW/m2. Estimates have been made of geothermal energy resources up to depths of 6000 meters. The main productive strata are of middle Pliocene in age. The results have allowed identification of geothermal resources with temperature above the 20°C and at depths less than 110-180 meters. Assessments of in-situ and recoverable resources have been made for 21 sites. Model simulations point to perspectives for widespread utilization of geothermal energy in the Absheron peninsula.

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Aspects of the Chronology, Structure and Thermal History of the Kawerau Geothermal Field

10.26686/wgtn.17005909.v1 ◽

2021 ◽

Author(s):

◽

Sarah Dawn Milicich

Keyword(s):

New Zealand ◽

Hydrothermal Alteration ◽

Electrical Power ◽

Geothermal Field ◽

Geothermal System ◽

Hydrothermal Conditions ◽

Geothermal Resources ◽

Textural Characteristic ◽

Structural Framework ◽

Geological Conditions

<p>The development and management of high-temperature geothermal resources for electrical power generation requires accurate knowledge of the local geological conditions, particularly where they impact on the hydrology of the resource. This study is an integrated programme of work designed to develop new perspectives on the geological and structural framework of the Kawerau geothermal resource as a sound basis for field management. Although the geological approaches and techniques utilised in this study have previously been used, their application to an integrated study of a geothermal system in New Zealand has not been previously undertaken. Correlating volcanic and sedimentary stratigraphy in geothermal areas in New Zealand can be challenging due to similarities in lithology and the destruction of distinctive chemical, mineralogical and textural characteristic by hydrothermal alteration. A means to overcoming these issues is to utilise dating to correlate the stratigraphy. Zircons are resistant to the effects of typical hydrothermal conditions and were dated using SIMS techniques (SHRIMP-RG) to retrieve U–Pb ages on zircons. These age data were then used to correlate units across the field, in part aided by correlations to material that had previously been dated from fresh rock by ⁴⁰Ar/³⁹Ar techniques, and used to redefine the stratigraphic framework for the area. [...] Although previously inferred to be a long–lived system, the modern Kawerau Geothermal Field is a Holocene entity reflecting the rejuvenation of magmatic heat flux associated with Putauaki volcano superimposed on an area of multiple reactivated fault structures, sporadic magmatism and variable rates of subsidence. This study documents past patterns of fluid flow, temperatures and chemistry, and inferred permeability within the field. Using textural relationships in selected samples, the relative timing and patterns of hydrothermal alteration, and fluid flows can be established. These textural relationships are then calibrated against fluid inclusion palaeotemperature measurements and isotope data and related to temperatures and compositions of past fluids. Short–lived heat sources beneath the field resulted from local magma intrusions, and are responsible for the 0.36 Ma and 0.138 Ma rhyolites and Holocene eruptive activity of Putauaki andesite–dacite volcano. The Putauaki activity is inferred to be responsible for the thermal and alteration characteristics of the modern system.</p>

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Application of Technology of the Internet of Things on the Monitoring of Geothermal Field

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.860-863.563 ◽

2013 ◽

Vol 860-863 ◽

pp. 563-567

Author(s):

Yuan Yu ◽

Yuan Lin Zou

Keyword(s):

Internet Of Things ◽

Heat Exchangers ◽

Underground Water ◽

Geothermal Field ◽

Geothermal Resources ◽

Exchange Area ◽

Geological Conditions ◽

True Time ◽

The Internet Of Things ◽

Rock And Soil

The technology of internet of things (IOT) can be utilizated to realize the monitoring the variation of geothermal field effectively and accurately in true time. Monitoring data shows that the influence range of underground heat exchangers is less than 3 m in certain hydro-geological conditions, and has no heat breakthrough in center hole of the whole area. The imbalance of heat collection and extraction don’t cause the temperature rise in geothermal field in summer and winter. Figures show that the regional shallow geothermal resources supply the heat-exchange area by the means of heat convection of underground water and heat transfer of rock and soil.

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Utilizing Geothermal Resources Below 150 C (300 F)

Journal of Energy Resources Technology ◽

10.1115/1.3446901 ◽

1979 ◽

Vol 101 (2) ◽

pp. 124-127 ◽

Cited By ~ 4

Author(s):

J. F. Kunze

Keyword(s):

High Temperature ◽

Geothermal Energy ◽

Geothermal Field ◽

Geothermal Resources ◽

Geothermal Waters ◽

The Us ◽

Higher Temperature ◽

Lower Temperature

Except for the steam-dominated geothermal field at Geysers, Calif., the use of geothermal energy in the US has been minimal. We have been so preoccupied with searching for the high temperature resources (above 350 F), for generating electricity, that we have largely ignored the greatest potential for geothermal energy, that at temperatures below 150 C (300 F). These waters are much more abundant than the higher temperature ones, and, therefore, represent 10 or more times as much useable energy than the total of the energy in all the high temperature waters. The problems have, in part, been technological—how to economically convert these lower temperature geothermal waters to useful energy—and in part institutional. This paper describes the last five year’s program, largely centered at the Idaho National Engineering Laboratory, to make it more practical and economical to harness the lower temperature geothermal resources.

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Aspects of the Chronology, Structure and Thermal History of the Kawerau Geothermal Field

10.26686/wgtn.17005909 ◽

2021 ◽

Author(s):

◽

Sarah Dawn Milicich

Keyword(s):

New Zealand ◽

Hydrothermal Alteration ◽

Electrical Power ◽

Geothermal Field ◽

Geothermal System ◽

Hydrothermal Conditions ◽

Geothermal Resources ◽

Textural Characteristic ◽

Structural Framework ◽

Geological Conditions

<p>The development and management of high-temperature geothermal resources for electrical power generation requires accurate knowledge of the local geological conditions, particularly where they impact on the hydrology of the resource. This study is an integrated programme of work designed to develop new perspectives on the geological and structural framework of the Kawerau geothermal resource as a sound basis for field management. Although the geological approaches and techniques utilised in this study have previously been used, their application to an integrated study of a geothermal system in New Zealand has not been previously undertaken. Correlating volcanic and sedimentary stratigraphy in geothermal areas in New Zealand can be challenging due to similarities in lithology and the destruction of distinctive chemical, mineralogical and textural characteristic by hydrothermal alteration. A means to overcoming these issues is to utilise dating to correlate the stratigraphy. Zircons are resistant to the effects of typical hydrothermal conditions and were dated using SIMS techniques (SHRIMP-RG) to retrieve U–Pb ages on zircons. These age data were then used to correlate units across the field, in part aided by correlations to material that had previously been dated from fresh rock by ⁴⁰Ar/³⁹Ar techniques, and used to redefine the stratigraphic framework for the area. [...] Although previously inferred to be a long–lived system, the modern Kawerau Geothermal Field is a Holocene entity reflecting the rejuvenation of magmatic heat flux associated with Putauaki volcano superimposed on an area of multiple reactivated fault structures, sporadic magmatism and variable rates of subsidence. This study documents past patterns of fluid flow, temperatures and chemistry, and inferred permeability within the field. Using textural relationships in selected samples, the relative timing and patterns of hydrothermal alteration, and fluid flows can be established. These textural relationships are then calibrated against fluid inclusion palaeotemperature measurements and isotope data and related to temperatures and compositions of past fluids. Short–lived heat sources beneath the field resulted from local magma intrusions, and are responsible for the 0.36 Ma and 0.138 Ma rhyolites and Holocene eruptive activity of Putauaki andesite–dacite volcano. The Putauaki activity is inferred to be responsible for the thermal and alteration characteristics of the modern system.</p>

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Complex development of underground large-water and geothermal resources reserves: carbon-geothermal energy-technology complexes

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2018-12-59-150-156 ◽

2018 ◽

Vol 12 (59) ◽

pp. 150-156

Author(s):

R.I. Pashkevich ◽

◽

V.A. Iodis ◽

Keyword(s):

Geothermal Energy ◽

Energy Technology ◽

Geothermal Resources ◽

Complex Development ◽

Large Water

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Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

Applied Sciences ◽

10.3390/app11062691 ◽

2021 ◽

Vol 11 (6) ◽

pp. 2691

Author(s):

Nataša Ćuković Ignjatović ◽

Ana Vranješ ◽

Dušan Ignjatović ◽

Dejan Milenić ◽

Olivera Krunić

Keyword(s):

Geothermal Energy ◽

Architectural Design ◽

Pannonian Basin ◽

Thermal Power ◽

Chemical Compositions ◽

Energy Potential ◽

Southeastern Part ◽

Geothermal Resources ◽

Heating And Cooling ◽

Different Temperatures

The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come from different types of reservoirs having different temperatures and chemical compositions. At the first site, a geothermal spring with a temperature of 20.5 °C is considered for heat pump utilization, while at the second site, a geothermal well with a temperature of 54 °C is suitable for direct use. The calculated thermal power, which can be obtained from geothermal energy is in the range of 300 to 950 kW. The development concept was proposed with an architectural design to enable sustainable energy efficient development of wellness and spa/medical facilities that can be supported by local authorities. The resulting energy heating needs for different scenarios were 16–105 kW, which can be met in full by the use of geothermal energy.

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