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- W59647631 abstract "The transient thermal history of a well drilling system has been identified as oneof the main problems that the geothermal well drilling industry needs to solve. Inparticular, the estimation of temperatures, in and around a geothermal well duringdrilling (circulation) and shut-in (thermal recovery) conditions, is required.To overcome this problem, a computer simulator (WELLTHER) has beendeveloped which uses a direct solution method to solve the finite difference equationsdescribing the transient heat transfer processes in a wellbore during drilling and shut-inoperations in the presence of the lost circulation to the formation. The new computersimulator uses a numerical model to account for the transient convective heat transfer inthe formation surrounding a well, due to lost circulation. This feature of the presentsimulator is important, since previous wellbore simulators consider the heat transferprocess in the formation (rock) as a merely conductive problem. The WELLTHERsimulator is capable of accounting for these losses at any point in the well and it hasbeen applied to the study of several Mexican geothermal wells. The results show that theeffect of lost circulation on the shut-in temperature profiles can be reproducedsatisfactorily. Likewise, a parametric analysis, carried out using the simulator,indicates that a number of assumptions made in previous numerical models are invalidand that certain factors ignored in previous models have a significant effect on thedynamic wellbore temperature distribution.Finally, a coupling of the new simulator with another computer code(STATIC TEMP) can be used as a tool to infer more reliably the static formationtemperatures in geothermal systems." @default.
- W59647631 created "2016-06-24" @default.
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- W59647631 date "1997-01-01" @default.
- W59647631 modified "2023-09-26" @default.
- W59647631 title "Transient numerical simulation of heat transfer processes during drilling of geothermal wells" @default.
- W59647631 hasPublicationYear "1997" @default.
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