Regional geothermal aquifer architecture of the fluvial Lower Cretaceous Nieuwerkerk Formation - A palynological analysis
| Autor: | Andrea Vondrak, Dirk K. Munsterman, Marinus Donselaar, H.F. Mijnlieff, C.J.L. Willems |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010506 paleontology
Geothermal heating Geochemistry Geological Survey Netherlands Fluvial Aquifer Structural basin West Netherlands Basin 010502 geochemistry & geophysics 01 natural sciences 2015 Geo Hot sedimentary aquifers GM - Geomodelling AGEA - Advisory Group for Economic Affairs 2015 Energy Geothermal gradient 0105 earth and related environmental sciences Palynology geography geography.geographical_feature_category Nieuwerkerk Formation Geology Cretaceous Direct-use geothermal Sporomorph eco-grouping Sedimentary rock ELSS - Earth Life and Social Sciences Geosciences |
| Zdroj: | Geologie en Mijnbouw/Netherlands Journal of Geosciences, 4, 96, 319-330 |
| Popis: | The primary challenge for efficient geothermal doublet design and deployment is the adequate prediction of the size, shape, lateral extent and thickness (or aquifer architecture) of aquifers. In the West Netherlands Basin, fluvial Lower Cretaceous sandstone-rich successions form the main aquifers for geothermal heat exploitation. Large variations in the thickness of these successions are recognised in currently active doublet systems that cannot be explained. This creates an uncertainty in aquifer thickness prediction, which increases the uncertainty in doublet lifetime prediction as it has an impact on net aquifer volume. The goal of this study was to improve our understanding of the thickness variations and regional aquifer architecture of the Nieuwerkerk Formation geothermal aquifers. For this purpose, new palynological data were evaluated to correlate aquifers in currently active doublet systems based on their chronostratigraphic position and regional Maximum Flooding Surfaces. Based on the palynological cuttings analysis, the fluvial interval of the Nieuwerkerk Formation was subdivided into two successions: a Late Ryazanian to Early Valanginian succession and a Valanginian succession. Within these successions trends were identified in sandstone content. In combination with seismic interpretation, maps were constructed that predict aquifer thickness and their lateral extent in the basin. The study emphasises the value of palynological analyses to reduce the uncertainty of fluvial hot sedimentary aquifer exploitation. Copyright © 2018 Netherlands Journal of Geosciences Foundation. |
| Databáze: | OpenAIRE |
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