Print Email Facebook Twitter Influential factors on the development of a low-enthalpy geothermal reservoir Title Influential factors on the development of a low-enthalpy geothermal reservoir: A sensitivity study of a realistic field Author Wang, Y. (TU Delft Reservoir Engineering) Voskov, D.V. (TU Delft Reservoir Engineering; Stanford University) Khait, M. (TU Delft Reservoir Engineering) Saeid, S. (TU Delft Reservoir Engineering) Bruhn, D.F. (TU Delft Reservoir Engineering; German Research Centre for Geosciences) Date 2021 Abstract A realistic deep low-enthalpy geothermal reservoir based on real data with high detail and complicated sedimentary structure is utilized to perform sensitivity analyses of the geological features influencing reservoir properties. We perform simulations using the Delft Advanced Research Terra Simulator (DARTS). Compelling numerical performance of DARTS makes it suitable for handling a large ensemble of models including efficient sensitivity and uncertainty analyses. The major finding is that shale facies, generally ignored in hydrocarbon reservoir simulations, can significantly extend the predictive lifetime of geothermal reservoirs exploited by deep well doublets. It is important to accurately account for the shale facies in the simulation, though with an additional computational overhead. The overburden layers can improve doublet performance, but the impact depends on reservoir heterogeneity. In addition, heterogeneity will also divert the flow path with even a minor shift in the well placement. The discharge rate, an essential parameter of geothermal operation strategy, inversely corresponds to the doublet lifetime but positively correlates with the energy production for studied parameter ranges. Low sensitivity of doublet lifetime to vertical-horizontal permeability ratio and permeability-porosity correlation is observed. All these systematic findings for a realistic geothermal field with characterization at unprecedented level of detail can help to provide a general guideline for forward simulation and farther improve the profitability of geothermal energy production in realistic deep geothermal reservoirs through computer-assisted modeling and optimization. Subject Doublet lifetimeLow-enthalpy geothermalNumerical simulationSensitivity analysis To reference this document use: http://resolver.tudelft.nl/uuid:4b0db9c3-d702-4851-ba75-bfb6a3eacde6 DOI https://doi.org/10.1016/j.renene.2021.07.017 ISSN 0960-1481 Source Renewable Energy, 179, 641-651 Part of collection Institutional Repository Document type journal article Rights © 2021 Y. Wang, D.V. Voskov, M. Khait, S. Saeid, D.F. Bruhn Files PDF 1_s2.0_S0960148121010223_main.pdf 3.41 MB Close viewer /islandora/object/uuid:4b0db9c3-d702-4851-ba75-bfb6a3eacde6/datastream/OBJ/view