Wyniki wyszukiwania - BazTech

1

Influence of fracture-matrix interaction on thermal front movement in fractured reservoir

Siemek J., Stopa J.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2015

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Vol. 63, nr 4

965--969

EN

Commercial exploitation of geothermal resources requires the disposal of large volumes of cooled brine in an environmentally acceptable way. Reinjection of cooled (i.e. spent) geothermal water has become a standard reservoir management strategy. Since injected fluids are typically much colder than the reservoir rock, this strategy results in the cooling of the region around the injection wells. Injected cool water may not have sufficient residence time in the reservoir to receive enough heat from surrounding hotter rock, resulting in temperature decrease at producing wells. Usually, the energy transport in geothermal reservoirs is calculated by use of sophisticated numerical simulators. In this paper we present analytical solution of simplified model of mass and heat transfer in fractured porous medium in one dimension, assuming constant rock temperature and neglecting small-scale effect connected with dispersion and heat conduction. The solution presented in this paper is applicable if thermal capacity of rock is high but the specific area is not sufficient for instant thermal equilibrium. This approach allows for better understanding the relation between fluid movement along the fractures and heat transfer between the rock matrix and fluid. Simple numerical experiments reported in the paper have shown the importance of specific surface area of naturally fractured rock, which influences the rate of exchange of heat between the fractures and the rock matrix.

2

Zbiornik geotermalny jury dolnej w rejonie Kleszczowa

Tomaszewska B., Bujakowski W., Barbacki A. P.

Przegląd Geologiczny

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2010

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Vol. 58, nr 7

603-608

EN

The paper presents results of research and drilling works related to realization of Kleszczów GT-1 borehole, performed between July 5th and November 10th, 2009. Geothermal waters will be used for space-heating and recreational purposes in a planned center of sports and recreation. While planning the drilling it was assumed that the exploitation of geothermal waters will be conducted in a closed, extraction/injection well-system. The Lower Jurassic aquifer was assumed as the most favourable reservoir for geothermal use. Drilling of Kleszczów GT-1 well confirmed the significant resources of geothermal waters. The geothermal water obtained is a brine of Cl-Na hydrogeochemical type and of TDS reaching 4.6 g/dm3. Measured well-head temperature was 52.2 stopn.C. On the third drawdown of pumping test the yield of geothermal water to 200.6 m3/h were obtained and the position of dynamic water table was at a depth of 89.9 m which corresponds to measured drawdown. The results of geological work of the Kleszczów GT-1 borehole will be used to design the second borehole (Kleszczów GT-2) for a two wells system.

3

Utilization of geothermal energy for electric power

Pinka J., Wittenberger G., Sidorova M., Vizi L.

Wiertnictwo, Nafta, Gaz

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2007

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T. 24, z. 1

373-380

EN

The geothermal energy is gaining more and more attention today. The geothermal energy is an energy derived from the heat of the earth's core. It is clean, abundant, and reliable. If properly developed, it can offer a renewable and sustainable energy source. There are three primary applications of geothermal energy: electricity generation, direct using of heat, and ground-source heat pumps. The results of geological research put Slovakia to the regions with the high geothermal potential. The project for the geothermal energy utilization in the area of east Slovakian Neogen is coming in to the phase of production tests these days. The article is also focused on the descriptions of every phase of geothermal water utilization.

PL

Obecnie energia geotermalna poważnie zyskuje na znaczeniu. Jest ona rodzajem energii pozyskiwanym z ciepła jądra Ziemi. Charakteryzuje ją czystość, obfitość i pewność. Jeżeli jest odpowiednio zarządzana, może stanowić zrównoważone źródło energii odnawialnej. Można wymienić trzy podstawowe zastosowania energii geotermalnej: produkcja energii elektrycznej, produkcja energii cieplnej oraz pompy ciepła. Wyniki badań geologicznych plasują Słowację na wysokim miejscu wśród krajów o dużym potencjale geotermalnym. Projekt wykorzystania energii geotermalnej na obszarze występowania wschodniosłowackiego neogenu weszła właśnie w fazę testów produkcyjnych. W artykule skoncentrowano się na opisie każdej z faz wykorzystanie wód geotermalnych.

4

Warunki geotermalne powiatu włocławskiego na tle województwa kujawsko-pomorskiego

Sokołowski J., Kempkiewicz K.

Technika Poszukiwań Geologicznych

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2001

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R. 40, nr 3

3-11

PL

W artykule przedstawiono warunki geotermalne powiatu włocławskiego na tle województwa kujawsko-pomorskiego. Na analizowanym terenie wyodrębniono podstawowe zbiorniki wód geotermalnych w utworach: dolnokredowych, górnojurajskich, środkowojurajskich, dolnojurajskich, górnotriasowych, środkowotriasowych, dolnotriasowych. Przedstawiono wyniki oceny zasobów energii geotermicznej, które łącznie oszacowano na 1778 mln tpu. W końcowej części artykułu podano sugestie odnośnie prawidłowego wykorzystania zasobów geotermicznych.

EN

The geothermal conditions in the Włocławek County have been presented in view of the situation in the Kujawy-Pomerania Voivodeship. The main geothermal reservoirs were discriminated within the Lower Cretaceous, Upper Jurassic, Middle Jurassic, Lower Jurassic, Upper Triassic, Middle Triassic and Lower Triassic strata. The geothermal energy resources were assessed to 1778 mln tpu. The paper closes with suggestions on the correct use of the geothermal.