Comparative analyses of pumping tests conducted in layered rhyolitic volcanic formations

Székely, Ferenc; Szűcs, Péter; Zákányi, Balázs; Cserny, Tibor; Fejes, Zsolt

doi:10.1016/j.jhydrol.2014.11.038

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…The average value of hydraulic conductivity of the carbonate aquifer matrix determined from recovery well tests is 1e-5 m/s (Székely et al 2015). A value of 5e-3 was used in our calculations for specific yield of the low permeability rock matrix based on well test data.…”

Section: Resultsmentioning

confidence: 99%

Well hydrograph analysis for the characterisation of flow dynamics and conduit network geometry in a karst aquifer, Bükk Mountains, Hungary

Kovács

Perrochet

Darabos

et al. 2015

Journal of Hydrology

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Section: Resultsmentioning

confidence: 99%

Well hydrograph analysis for the characterisation of flow dynamics and conduit network geometry in a karst aquifer, Bükk Mountains, Hungary

Kovács

Perrochet

Darabos

et al. 2015

Journal of Hydrology

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“…Automatic parameter calibration may be carried out by fitting the simulated drawdown, recovery, flow metering and overflow data to the measured ones. The software has been successfully applied to the evaluation of field tests conducted in sedimentary aquifers (Székely 1992(Székely , 2012Mukhopadhyay et al 1994), fissured granite (Székely 2013;Székely and Galsa 2006) and in volcanic aquifers (Székely et al 2015), as well. Table 2 shows the comparison of the VTZ and the WT models.…”

Section: Analytical and Numerical Wt Softwarementioning

confidence: 99%

Revision of archive recovery tests using analytical and numerical methods on thermal water wells in sandstone and fractured carbonate aquifers in the vicinity of Budapest, Hungary

et al. 2020

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This study offers a reinterpretation of archive aquifer tests, predominantly on the basis of recovery data, from an original datasheet of thermal water wells located in carbonate and sandstone aquifer units in the vicinity of Budapest, Hungary. The study compares the hydraulic conductivity (K) and specific storage (S s) values derived in the first instance from an aquifer test evaluation. This included an initial application of the classical analytical Cooper and Jacob method. Subsequently, the visual two-zone (VTZ) numerical method was applied, then third, a more complex model, namely, WT software. It was found that the simple analytical solution is not able to represent the field conditions accurately, while in the course of the application of the VTZ model, it proved possible to alter the various hydraulic parameters within reasonable limits to fit the field data. In the case of the VTZ model, the researcher is required to calculate the accuracy of the fitted model separately, while with the WT model, this is automatic, the software seeks out the best fit. In addition to VTZ parameters, the WT model can efficiently incorporate data on up to 500 model layers, water level, and pressure. The optimization of the parameters may be achieved by automatic calibration, improving the accuracy of the numerical results. Recovery tests for 12 wells were numerically simulated to obtain values for vertical and horizontal hydraulic conductivity and specific storage for Triassic and Eocene fractured carbonate and the Upper-Miocene-Pliocene granular sandstone aquifer units. When an analytical solution is applied, only average values could be obtained. The conclusion reached was that the results of the analytical solution can be improved by the use of numerical methods. These methods are able to incorporate basic information on well design, aquifer material and the hydrogeological environment in the course of the evaluation. The revision of the archive recovery data using numerical methods may assist in the quest for better data for numerical flow and transport simulations without the need to perform new tests. In addition, the methods employed here can explain cases in which the original analytical interpretations proved unable to yield reliable data and predictions.

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“…A geotermikus energia hasznosításának gyökerei és kezdeti legfontosabb eredményei hazánkban leginkább Délkelet-Magyarországhoz köthetők (Szanyi-Kovács, 2010). A jelenlegi rendszerek hidrotermális rendszereknek tekinthetők (Székely et al, 2015), hiszen a geotermikus energia a felszín alatti kőzetekben tárolt hévíz segítségével jut el a felszínig. Komoly probléma, hogy az energetikai célból felhasznált hévizeknek alig 10%-át sajtolják vissza.…”

Section: Kihívások éS Lehetőségek a Hazai Geotermikus Energia Felhaszunclassified

Kihívások és új lehetőségek a geotermikus energia hasznosításának növelésében

Szűcs¹,

Madarász²,

Hartai³

et al. 2019

Ma.Tud.

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1 az MTA doktora, dékán, kutatócsoport-vezető, egyetemi tanár 2 PhD, intézetigazgató, egyetemi docens 3 PhD, címzetes egyetemi tanár 4 PhD, egyetemi adjunktus 5 PhD, egyetemi docens a Miskolci Egyetem Műszaki Földtudományi Kar, Miskolc b MTA-ME Műszaki Földtudományi Kutatócsoport, Miskolc hgszucs@uni-miskolc.hu ÖSSZEFOGLALÁS Magyarország geotermikus természeti adottságai köztudottan igen jónak tekinthetők. A tanulmány arra keres választ, hogy milyen irányok mentén növekedhet a hazai geotermikus energia felhasználása, milyen akadályozó tényezőket és kihívásokat szükséges megoldani kutatás-fejlesztés segítségével a potenciális beruházók részére annak érdekében, hogy új lehetőségek nyíljanak a geotermikus energia hasznosítására. ABSTRACTIt is a well-known fact that the geothermal energy potential is very high in Hungary. The main aim of this paper is to give potential directions where the geothermal energy utilization can be increased significantly in Hungary in the future. In addition, some natural and technical challenges are also outlined, which can be solved by intense research and innovation activity.

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Comparative analyses of pumping tests conducted in layered rhyolitic volcanic formations

Cited by 8 publications

References 11 publications

Well hydrograph analysis for the characterisation of flow dynamics and conduit network geometry in a karst aquifer, Bükk Mountains, Hungary

Well hydrograph analysis for the characterisation of flow dynamics and conduit network geometry in a karst aquifer, Bükk Mountains, Hungary

Revision of archive recovery tests using analytical and numerical methods on thermal water wells in sandstone and fractured carbonate aquifers in the vicinity of Budapest, Hungary

Kihívások és új lehetőségek a geotermikus energia hasznosításának növelésében

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