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Extraction of geothermal energy resources associated with abandoned oil and gas wells: benefits and limits

Abusalam Mukhtarov

Extraction of geothermal energy resources associated with abandoned oil and gas wells: benefits and limits.

Rel. Stefano Lo Russo, Martina Gizzi. Politecnico di Torino, Corso di laurea magistrale in Petroleum And Mining Engineering (Ingegneria Del Petrolio E Mineraria), 2021

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Abstract:

Abandoned oil and gas wells (AOGWs) in mature oilfields with adequate bottomhole temperature are associated with geothermal energy resources which can be used for various utilizations. In recent years, the majority of researches has been focused on the extraction of geothermal energy from AOGWs using downhole heat exchangers (DHEs), a closed-loop type of system potentially applied to harness geothermal energy from deep wells. ??In this study, we investigated selected AOGWs with the aim to evaluate the feasibility of power generation by using a DHEs. A thermodynamic model is developed by using Engineering Equation Solver (EES) software. In addition, the impacts of rock properties, geothermal gradient, geometry of downhole heat exchanger, insulation thickness, mass flow rate of working fluid, selection of working fluid on the rate of the heat extraction are investigated in the parametric study proposed. Moreover, the future performance of the system depending on rock properties is also analysed. ??The fluid of R134a has been selected as a working fluid regarding the simulations done by EES. The simulation’s results indicated the importance to take changing fluid properties along exchanger into account. Additionally, the results lead to conclude that the generation of power from AOGWs by using DHEs is strongly dependent on the geothermal gradient through the well, the length of the heat exchanger and rock conductivity.

Relatori: Stefano Lo Russo, Martina Gizzi
Anno accademico: 2021/22
Tipo di pubblicazione: Elettronica
Numero di pagine: 66
Soggetti:
Corso di laurea: Corso di laurea magistrale in Petroleum And Mining Engineering (Ingegneria Del Petrolio E Mineraria)
Classe di laurea: Nuovo ordinamento > Laurea magistrale > LM-35 - INGEGNERIA PER L'AMBIENTE E IL TERRITORIO
Ente in cotutela: Izmir Institute of Technology (TURCHIA)
Aziende collaboratrici: Izmir Institute of Technology
URI: http://webthesis.biblio.polito.it/id/eprint/19973
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