TITLE:
Research on Temperature Distribution in Wellbore of Deep Well Drilling
AUTHORS:
Boyi Xia
KEYWORDS:
Deep Well, Drilling, Temperature Distribution, HAS
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.11 No.12,
December
16,
2021
ABSTRACT: The
wellbore temperature has an important effect on design and drilling of deep
well. Based on energy conservation equations and actual drilling data of
one deep well, the wellbore temperature distribution was simulated and the
influence of different parameters on the wellbore temperature was revealed using the software of Hydraulics Analysis System.
The results show that, while drilling, the mud temperature in wellbore
gradually decreases from the formation temperature to the stable temperature,
and it is higher than the mud inlet
temperature on ground, the annular temperature is higher than the temperature
in drill string, and the bottom hole temperature is higher than the ground
temperature. The effect of geothermal gradient on
wellbore temperature is great, while the mud density is negligible. The bottom
hole temperature increases with the increase of mud inlet temperature,
geothermal gradient, mud thermal conductivity and decrease of mud flow rate,
mud specific heat and mud density.