MATHEMATICAL SIMULATION OF A NONSTATIONARY THERMAL FIELD 
IN THE "WELL-BEING-DRILLED-ROCKS" SYSTEM


R. A. Valiullin, A. A. Sadretdinov,
R. F. Sharafutdinov, and R. B. Bulgakov

UDC 536.622

A mathematical model and results of calculation of a nonstationary 
thermal field in the process of drilling a well in rocks having different 
thermophysical properties, with a laminar mode of flow of the drilling 
mud, are considered. The distributions of temperature over the well 
bore in different drilling regimes are given. It is shown that when 
the drilling is stopped, the temperature anomalies in the well are 
preserved for 24-48 h in the intervals of alive beds.

Bashkiriya State University, 32 Frunze Str., Ufa, 450074, Russia; 
email: gframil@rambler.ru. Translated from Inzhenerno-Fizicheskii 
Zhurnal, Vol. 79, No. 5, pp. 85-85, September-October, 2006. 
Original article submitted May 12, 2005.