钻探工程2026，Vol.53Issue(5)：44-54,11.DOI:10.12143/j.ztgc.2026.05.005
板式换热器内钻井液流动与传热特性数值模拟研究
Numerical simulation of flow and heat transfer characteristics of drilling fluid in a plate heat exchanger
摘要
Abstract
In deep oil,gas,and geothermal drilling,elevated bottom-hole temperatures degrade drilling fluid performance,posing a severe threat to operational safety and efficiency.As the core equipment of the drilling fluid cooling system,the plate heat exchanger(PHE)has internal flow and heat transfer characteristics that critically determine overall system performance.In this study,a high-temperature-resistant water-based drilling fluid was investigated via conjugate heat transfer numerical simulations using ANSYS Fluent,with model validation performed with laboratory cooling experiments.The evolution of flow field non-uniformity,pressure drop,Nusselt number(Nu),thermal resistance distribution,and comprehensive performance index was systematically analyzed over a wide Reynolds number range(17≤Rem<1700).The results demonstrate that flow separation induced as the drilling fluid flows past plate contact points generates low-velocity vortex zones,which are identified as high-risk regions for fouling deposition.Both flow field non-uniformity and pressure drop exhibit piecewise nonlinear variations with increasing Rem,clearly delineating the transition from laminar to turbulent flow,with Rem=50 identified as the laminar-to-transitional critical threshold.As Rem increases,Nu increases substantially,yet its growth rate declines through four distinct stages.The dominant thermal resistance shifts from the drilling fluid side to the water side when Rem>560.The comprehensive performance index decreases continuously with increasing Rem,indicating that the heat transfer gain per unit increase in flow velocity grows more slowly than the accompanying rise in flow resistance,leading to sustained degradation in overall energy efficiency.This study elucidates the trade-off mechanism between heat transfer enhancement and flow resistance for high-viscosity drilling fluids,providing theoretical support for the optimal design and operational regulation of high-temperature drilling fluid cooling systems.关键词
板式换热器/钻井液冷却/流动特性/传热性能/数值模拟/热阻/综合性能/超深井Key words
plate heat exchanger/drilling fluid cooling/flow characteristics/heat transfer performance/numerical simulation/thermal resistance/comprehensive performance/ultra-deep well分类
天文与地球科学引用本文复制引用
冯壕辛,郭威,孙艺赫,徐墁旎,段小辉,孙思远,贾瑞..板式换热器内钻井液流动与传热特性数值模拟研究[J].钻探工程,2026,53(5):44-54,11.基金项目
国家重点研发计划(编号:2022YFC2806402-01) （编号:2022YFC2806402-01）
国家自然科学基金项目(42572291) （42572291）
地球深部探测与矿产资源勘查国家科技重大专项(编号:2024ZD1000800、2024ZD1000803). （编号:2024ZD1000800、2024ZD1000803）
