2023
DOI: 10.3389/fenrg.2023.1142662
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Impact of microannulus on the efficiency of heat transfer in the bottomhole

Abstract: To ensure feasible power generation from closed-loop geothermal wells, deeper wells are required to reach higher temperature zones. However, weak bonding between cement and casing or cement and formation may allow formation of a small gap (known as microannulus), which could have a negative effect on the heat extraction rate and consequently compromises the entire investment. Previous projects have reported that the output temperatures were significantly lower than the expected values, and the cause is believe… Show more

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