Wellbore temperature field numerical simulation and influencing factors analysis considering drill tool heat generation

doi:10.3969/j.issn.1006-6535.2026.01.014

Abstract

Abstract: To prevent drill tool failure caused by local heat generation during drilling operations,a numerical simulation model of the wellbore temperature field incorporating local heat sources was established to accurately calculate the wellbore temperature during drilling fluid circulation.In addition,the influencing factors of the heat source item was analyzed.The results show that compared with a model without a heat source item,the model including a local heat source predicts a bottom-hole temperature about 8.0^oC higher,and the model accuracy is improved to 98.42%. Under the influence of the local heat source,the bottom-hole drilling fluid temperature can exceed the formation temperature,at which point the drill bit is prone to high-temperature damage.The friction coefficient,drill pipe diameter and bit diameter,weight on bit,and rotary speed all have significant effects on the local heat generation and should not go neglected in wellbore temperature field prediction.This study provides an important theoretical basis for optimizing drilling parameters and designing safety drill-tool in deep high-temperature wells,and offers guidance for ensuring drilling safety and preventing downhole failures.

Key words: drill tool heat generation, wellbore temperature field, local heat source, drilling fluid circulation

CLC Number:

TE254

YU Yang, SU Yi'nao, HE Jun, SUN Weixu, GENG Jingzhou, ZHANG Yuhao. Wellbore temperature field numerical simulation and influencing factors analysis considering drill tool heat generation[J]. Special Oil & Gas Reservoirs, 2026, 33(1): 121-129.

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