scholarly journals Characterization of petrophysical parameters of the Lower Triassic deposits in a prospective location for Enhanced Geothermal System (central Poland)

2013 ◽  
Vol 57 (4) ◽  
Author(s):  
Anna SOWIŻDŻAŁ ◽  
Bartosz PAPIERNIK ◽  
Grzegorz MACHOWSKI ◽  
Marek HAJTO
Keyword(s):  
Lower Triassic ◽  
Geothermal System ◽  
Enhanced Geothermal System ◽  
Petrophysical Parameters ◽  
Central Poland

scholarly journals Analyses of permeability and porosity of sedimentary rocks in terms of unconventional geothermal resource explorations in Poland

Geologos ◽  
2016 ◽  
Vol 22 (2) ◽  
pp. 149-163 ◽  
Author(s):  
Anna Sowiżdżał ◽  
Roman Semyrka
Keyword(s):  
Pore Diameter ◽  
Sedimentary Rocks ◽  
Lower Triassic ◽  
Effective Porosity ◽  
Geothermal System ◽  
Enhanced Geothermal System ◽  
Average Pore ◽  
Skeletal Density ◽  
Geothermal Potential ◽  
Resource Exploration

Abstract Petrophysical investigations are fundamental to natural resource exploration. In order to recognise the geothermal potential of sedimentary rocks in central Poland, 259 samples were collected from prospective deep-lying geothermal reservoirs. Parameters measured include bulk density, skeletal density, effective porosity, permeability, average pore diameter and specific surface. Results indicate that at great depths (mostly > 3,000 m below surface) sedimentary rocks show low values of porosity (mainly less than 5%) and permeability (only sporadically in excess of 1 md). These values call for a petrothermal use of reservoirs, for which an Enhanced Geothermal System (EGS) was developed. Reservoirs suited for the EGS are Carboniferous and Lower Triassic sandstones in the central part of Poland (Mogilno-Łódź Trough region and a small part of the Kujawy Swell and Fore-Sudetic regions). In addition, Carboniferous limestones in this area are potentially prospective.

scholarly journals Performance of Hybrid Single Well Enhanced Geothermal System and Solar Energy for Buildings Heating

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2473
Author(s):  
Yujiang He ◽  
Xianbiao Bu
Keyword(s):  
Solar Energy ◽  
Service Life ◽  
Heating System ◽  
Hydrothermal Systems ◽  
Geothermal System ◽  
Heat Output ◽  
Enhanced Geothermal System ◽  
Geothermal Heat ◽  
Hybrid Heating ◽  
Single Well

The energy reserves in hot dry rock and hydrothermal systems are abundant in China, however, the developed resources are far below the potential estimates due to immature technology of enhanced geothermal system (EGS) and scattered resources of hydrothermal systems. To circumvent these problems and reduce the thermal resistance of rocks, here a shallow depth enhanced geothermal system (SDEGS) is proposed, which can be implemented by fracturing the hydrothermal system. We find that, the service life for SDEGS is 14 years with heat output of 4521.1 kW. To extend service life, the hybrid SDEGS and solar energy heating system is proposed with 10,000 m2 solar collectors installed to store heat into geothermal reservoir. The service life of the hybrid heating system is 35 years with geothermal heat output of 4653.78 kW. The novelty of the present work is that the hybrid heating system can solve the unstable and discontinuous problems of solar energy without building additional back-up sources or seasonal storage equipment, and the geothermal thermal output can be adjusted easily to meet the demand of building thermal loads varying with outside temperature.

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