Heat efflux estimation during a borehole drilling

  • Vladimir I. Zui Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk, Republic of Belarus
  • Yaroslav G. Gribik Institute for Nature Management, National Academy of Sciences of Belarus, F. Skoriny street, 10, 220114, Minsk, Republic of Belarus
  • Aleksandr L. Suslenko Republican Unitary Enterprise «Scientific-Production Center for Geology», Proletarskaya street, 77, 247760, Mozyr, Republic of Belarus

Abstract

A field experiment to estimate the withdrawal of heat by a circulating mud was described on the basis of the borehole «Novo-Korenevskaya-13» located within the Pripyat Trough (Belarus) which was in a drilling process. A rock fragmentation process is accompanied by a heat release. Drilling of deep wells is fulfilled using a drilling mud (usually a clay mud). It cools the tool which frays and crushes rocks at the well bottom as well as removes detritus from a wellbore to the ground surface. The paper is devoted to calculation of the heat efflux by circulating drilling fluid during this well drilling. It was shown that this mud, circulating along the wellbore, evacuates to the ground surface not only detritus but provides the heat efflux as well. The experiment included the temperature monitoring of the drilling mud pumped into a drill string and its outflow from the well. We discuss the heat power delivered to the ground surface. It was confirmed that the heat efflux by the circulating fluid in a wellbore could attain hundreds of kilowatts or even slightly exceed 1 MWth depending on the drilling depth, drillable rock types and the natural rock temperature at the considered depth. An assessment of heat withdrawal in the process of deep borehole drilling during oil exploration works within the Pripyat Trough represents both a scientific and practical interest. The heat release during the drilling process could be used for practical purposes. 

Author Biographies

Vladimir I. Zui, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk, Republic of Belarus

doctor of science (geology and mi neralogy), full professor; associate professor at the department of engineering geology and geophysics, faculty of geography

Yaroslav G. Gribik, Institute for Nature Management, National Academy of Sciences of Belarus, F. Skoriny street, 10, 220114, Minsk, Republic of Belarus

PhD (geology and mineralogy), head of the tectonics and geophysics laboratory

Aleksandr L. Suslenko, Republican Unitary Enterprise «Scientific-Production Center for Geology», Proletarskaya street, 77, 247760, Mozyr, Republic of Belarus

chief geologist of the Mozyr Oil Exploration Expedition on Deep Drilling

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Published
2017-10-16
Keywords: borehole, borehole drilling, drilling mud, underground heat, borehole heat exchanger
Supporting Agencies Authors acknowledge PhD M. D. Parkhomov for his help with calculations of the thermal power efflux from the drilled well «Novo-Korenevskaya-13» as well as for measurements of the volumetric heat capacity of a drilling mud sample
How to Cite
Zui, V. I., Gribik, Y. G., & Suslenko, A. L. (2017). Heat efflux estimation during a borehole drilling. Journal of the Belarusian State University. Geography and Geology, 1, 171-179. Retrieved from https://journals.bsu.by/index.php/geography/article/view/815
Issue
No 1 (2017): Journal of the Belarusian State University. Geography and Geology
Section
Geology

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