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Geothermal aquifer performance assessment for direct heat production – Methodology and application to Rotliegend aquifers

Published online by Cambridge University Press:  24 March 2014

J.-D. van Wees ,
A. Kronimus ,
M. van Putten ,
M.P.D. Pluymaekers ,
H. Mijnlieff ,
P. van Hooff ,
A. Obdam  and
L. Kramers
J.-D. van Wees*
Affiliation:
TNO – Geological Survey of the Netherlands, P.O. Box 80015, 3508 TA Utrecht, the Netherlands Utrecht University, Tectonics group, Faculty of Earth Sciences, PO Box 80021, 3508 TA, Utrecht, the Netherlands
M. van Putten
Affiliation:
TNO – Geological Survey of the Netherlands, P.O. Box 80015, 3508 TA Utrecht, the Netherlands
M.P.D. Pluymaekers
Affiliation:
TNO – Geological Survey of the Netherlands, P.O. Box 80015, 3508 TA Utrecht, the Netherlands
H. Mijnlieff
Affiliation:
TNO – Geological Survey of the Netherlands, P.O. Box 80015, 3508 TA Utrecht, the Netherlands
P. van Hooff
Affiliation:
TNO – Geological Survey of the Netherlands, P.O. Box 80015, 3508 TA Utrecht, the Netherlands
A. Obdam
Affiliation:
TNO – Geological Survey of the Netherlands, P.O. Box 80015, 3508 TA Utrecht, the Netherlands
L. Kramers
Affiliation:
TNO – Geological Survey of the Netherlands, P.O. Box 80015, 3508 TA Utrecht, the Netherlands
*
Email: [email protected]
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Abstract

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In this paper we present a probabilistic fast model for performance assessment of geothermal doublets for direct heat applications. It is a simple yet versatile and multipurpose tool. It can be well applied in better understanding the sensitivity of performance to key subsurface parameters and depth trends therein, and for assessing the probability of success for geothermal projects under technical and financial constraints.

The underlying algorithms deliver a sensible accuracy given the uncertainties associated with geothermal projects at exploration state. A public release of the software, available under the name of DoubletCalc, is easy to handle and requires a limited set of input parameters. Thanks to an open source code, DoubletCalc can be implemented in other software applications and extended as it has been implemented for the integration into the national geothermal information system in the Netherlands (ThermoGIS, 2011).

Apart from its application for site assessments, the tool can be integrated into automated workflows processing faster representations of key aquifer properties and capable to produce indicative maps for predicted doublet power, economic feasibility and prediction of cumulative amount of heat that can be recovered. These capabilities are specifically important for decision support for policymakers while assessing the effects of particular insurance schemes and funding mechanisms.

DoubletCalc cannot and is not intended to substitute geologic exploration approaches. As exploration measures, such as seismic surveys are cost intensive, DoubletCalc can be used to focus geothermal exploration on areas and sites where an enhanced probability of success can be expected.

Keywords

Geothermal energyperformance assessmentaquifer
Type
Research Article
Information
Netherlands Journal of Geosciences , Volume 91 , Issue 4 , December 2012 , pp. 651 - 665
Copyright
Copyright © Stichting Netherlands Journal of Geosciences 2013

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