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A Fully-Coupled Implicit Transient Two-Phase Wellbore Simulator

Nitschke, Fabian; Gholami Korzani, Maziar; Held, Sebastian; Kohl, Thomas

Abstract (englisch):
Boreholes under operation conditions typify a highly non-linear and complexly coupled thermo-hydraulic-chemical (THC) system. Multiple parameters, such as temperature, pressure, specific heat, enthalpy, viscosity, flow regime, heat transfer, degassing, steam quality, salinity and solubility are inter connected. Production and injection often entail several engineering challenges and operational problems within the boreholes but also up and down stream (reservoir-power plant-reservoir), which can be very diverse in their character. Finding solutions or working on process optimization prerequisite a profound understanding and a reliable tool to quantify these processes. Compared to reservoirs, the processes in boreholes are highly dynamic and fluctuating. Most existing simulators provide either only steady state solutions or are based on a just weakly coupled numerical scheme. We develop a new tool solving for the aforementioned parameters in a fully-coupled, implicit, and transient manner, which is a prerequisite to realistically model dynamic borehole conditions.
Herein, we present the current state of the development of the simulator for multicomponent non-isothermal two-phase flow. ... mehr

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Preprint §
DOI: 10.5445/IR/1000105800
Veröffentlicht am 14.02.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2020
Sprache Englisch
Identifikator KITopen-ID: 1000105800
HGF-Programm 35.14.01 (POF III, LK 01)
Effiziente Nutzung geothermisch. Energie
Erschienen in World Geothermal Congress 2020
Veranstaltung World Geothermal Congress (2021), Reykjavík, Island, 21.05.2021 – 26.05.2021
Schlagwörter Wellbore simulator, transient, fully-coupled, compressible fluid, two-phase fluid, drift-flux flow
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