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With the rapid depletion of oil and gas reservoirs, many oil and gas wells become abandoned. These abandoned wells could be recovered if they are drilled in proper geothermal layers. Besides, CO2 is always selected as working fluid due to huge amount of resources, as well as for the purpose of CO2 geological storage. At present, the study on CO2 flow in the horizontal wellbores is quite limited. In...
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...
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