摘要
为了保障石油开采向万米深层进发,提高测井仪器的耐温耐压指标,解决测井仪器电路热失效问题,针对测井仪器开展传热理论研究及仿真试验分析。根据测井仪器实际工况,通过仪器与井下流体的对流模型分析不同因素对平均对流换热系数的影响;针对直肋散热器构建传热模型,计算肋片散热效率,通过有限元方法求解测井仪器三维模型,并开展仪器高温试验,分析不同类型散热器对芯片温度的影响。结果表明,流体的平均对流换热系数与仪器上提速度正相关,可以通过调整井下流体成分的配比改变平均对流换热系数;测井仪器高温区域主要集中在芯片附近,应考虑将热量向仪器两端传递以提高散热效率;高温试验测试结果与散热器仿真结果一致,均说明弧形肋片散热器的散热效果最优。该研究可以为测井仪器热管理提供理论指导。
In order to ensure the deep development of oil exploration,improve the temperature and pressure resistance indicators of logging tools,and solve the problem of thermal failure of logging tools circuits,this article focuses on the theoretical research and simulation test analysis of heat transfer for logging tools.Based on the actual working conditions of logging tools,the influence of different factors on the average convective heat transfer coefficient is analyzed through a convection model between the logging tools and the downhole fluid.A heat transfer model for a straight fin heat sink is constructed,and the heat dissipation efficiency of the fins is calculated.The three-dimensional model of the logging tools is solved using finite element method,and the impact of different heat sink types on chip temperature is analyzed by conducting high-temperature experiments on logging tools.The results indicate that the average convective heat transfer coefficient of the fluid is positively correlated with the lifting speed of the logging tools,and it can be changed by adjusting the ratio of downhole fluid components.The high-temperature area of logging tools is mainly concentrated near the chip,and it should be considered to transfer heat to both ends of the logging tools to improve heat dissipation efficiency.The high temperature experimental test results are consistent with the simulation results of the heat sink,indicating that the arc-shaped fins heat sink has the best heat dissipation performance.Therefore,this article can provide theoretical guidance for thermal management of logging tools.
作者
王东宇
张崇儒
王晓冬
王俊
张丁介
陈文辉
WANG Dongyu;ZHANG Chongru;WANG Xiaodong;WANG Jun;ZHANG Dingjie;CHEN Wenhui(Logging Technology Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China;Well Logging Key Laboratory,China National Petroleum Corporation,Xi’an,Shaanxi 710077,China)
出处
《测井技术》
CAS
2024年第1期19-26,共8页
Well Logging Technology
基金
中国石油天然气集团有限公司应用攻关型项目“175℃@60 h全系列成像测井关键技术攻关和装备研制”(2023ZZ26)
中国石油集团测井有限公司项目“井下仪器热管理关键技术研究”(CPL2021-D03)。
关键词
测井仪器
高温高压
对流模型
散热效率
弧形肋片
logging tool
high temperature and high pressure
convection model
heat dissipation efficiency
arc-shaped fin
