 Geothermal energy extraction in CO2 rich basin using abandoned horizontal wellsFengrui Sun, Yuedong Yao, Guozhen Li and Xiangfang Li Energy, 2018, vol. 158, issue C, 760-773 Abstract: Compared with traditional oil and gas resources, geothermal energy processes the advantages of zero emission, low investment and high productivity, etc. in this paper, a model is developed for simulating CO2 circulating in a geothermal horizontal well. The energy and momentum balance equations of CO2 flow in long tube and annuli are solved numerically. The relationships between geothermal productivity and injection parameters are revealed. It is concluded that: (a) The standard of choosing parameters for measuring the rate of geothermal production is whether or not the parameter can reflect the heat transfer rate or fluid temperature rise. (b) Taking multiple factors (temperature decrease, enthalpy decrease, small increase in heat production rate and increase in cost) into consideration, a small mass injection rate is recommended to obtain a better economic performance. (c) Taking multiple factors (temperature increase, decrease in heat production rate and increase in cost) into consideration, a small injection pressure is recommended to obtain a better economic performance. Keywords: Geothermal energy; CO2 circulating; Horizontal wells; Full-length wellbore modeling; Productivity; Injection parameters (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:158:y:2018:i:c:p:760-773 DOI: 10.1016/j.energy.2018.06.084 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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