Fyk, M. I.Biletskyi, V. S.Abbood, M.Desna, N. A.2022-08-242022-08-242022Specifying the Methods to Calculate Thermal Efficiency of a Dual Production Well System "Fluid-Geoheat" [Electronic resource] / M. I. Fyk [et al.] // Petroleum and Coal. – Electronic text data. – 2022. – Vol. 64, iss. 2. – P. 265-277. – Access mode: https://www.vurup.sk//wp-content/uploads/2022/06/PC-X_Desna_134.pdf, free (date of the application 24.08.2022.).https://repository.kpi.kharkov.ua/handle/KhPI-Press/57741Methods to calculate thermal efficiency of dual production well system “fluid-geoheat” have been specified for conditionally thin productive fluid-saturated seam in terms of radial planar filtration. It has been demonstrated that relative to a variant, ignoring Joule-Thompson effect, and variant of discrete Joule–Thomson coefficient substitution, calculation accuracy as for the well heat efficiency increases by 33% and 9% respectively. It has been proved that it is expedient for a conditionally thin seam to use effective temperature within the heat-exchange equitation with Fourier substitution as related to heat transfer while considering heat input in terms of unidirectional input to a virtual disk plate from the seam floor. In the context of the proposed calculation methods, increase in numerical estimations of thermal efficiency of a well results from the consideration of extra heat pumping owing to Joule-Thompson effect by rocks adjoining the productive formation.enhydrocarbon wellthermal efficiency of a systemmechanocaloric effectthermal diffusiongeothermal energy productionArticlehttps://orcid.org/0000-0001-5154-6001https://orcid.org/0000-0003-2936-9680https://orcid.org/0000-0003-4187-9966