地热井钻井过程中钻井液热物理性质对井筒温度压力的影响  

Influence of Thermal Physical Properties of Drilling Fluid on Wellbore Temperature and Pressure during Geothermal Well Drilling

作　　者：张政 袁健鹏 马蠡 王国荣[3] 钟林[3] ZHANG Zheng;YUAN Jian-peng;MA Li;WANG Guo-rong;ZHONG Lin(School of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu 610500,China;Oil and gas deposits in Southwest Oil and Gas Field,Suining 629018,China;School of Mechanical and Electrical Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]西南油气田川中油气矿,遂宁629018 [3]西南石油大学机电工程学院,成都610500

出　　处：《科学技术与工程》2025年第7期2767-2775,共9页Science Technology and Engineering

基　　金：四川省重点研发计划(区域创新合作项目2025YFHZ0306);国家自然基金面上项目(52374011);西南石油大学油气藏地质与开发国家重点实验室开放基金(PLN2022-46);深水钻井工程四川省自然科学基金创新研究群体项目(2023NSFSC1980)。

摘　　要：随着能源行业的发展以及世界能源需求的不断增长,地热资源勘探开发的难度不断增加,深层、超深层地热资源已经成为新能源行业开发的重点方向。随着地热井钻进深度的不断增加,钻井液热物理性质随温度压力变化对井筒温度压力的计算将会产生更为显著的影响。建立了地热井钻井过程中井筒瞬态温度压力耦合数值模型,研究了地热井钻井过程中钻井液的密度和黏度随温度压力变化对井筒温度压力计算的影响。计算结果表明,钻井液的黏度和密度对井筒温度的计算结果具有重要的影响,与不考虑黏度随温度变化的情况下相比,考虑黏度随温度变化的情况下井底温度的计算结果高出3.1%,考虑黏度和密度同时随温度压力变化的情况下井底温度的计算结果高出4.99%。可见,为了提高计算精度,在进行地热井井筒温度压力计算时应当充分考虑钻井液的热物理性质随温度压力变化的影响。With the development of the energy industry and the continuous growth of global energy demand,the exploration and development of geothermal resources have become increasingly difficult.Deep and ultra-deep geothermal resources have been identified as a key direction for the development of the new energy industry.As the drilling depth for geothermal wells continues to increase,the thermal and physical properties of the drilling fluid are found to have a more significant impact on the calculation of wellbore temperature and pressure amid changes in temperature and pressure.In A coupled numerical model of transient temperature and pressure in the wellbore during the drilling of geothermal wells was established,and the influence of the density and viscosity of drilling fluid on the calculation of wellbore temperature and pressure with changes in temperature and pressure during the drilling of geothermal wells was studied.It was shown by the calculation results that the viscosity and density of the drilling fluid significantly affected the calculation of wellbore temperature.When the changes in viscosity with temperature are considered,the calculation results of wellbore temperature are found to be 3.1%higher,and when changes in viscosity and density with both temperature and pressure are considered simultaneously,the results are 4.99%higher,compared with the case where changes in viscosity with temperature are not taken into account;To improve the accuracy of calculations,the thermal and physical properties of drilling fluid should be fully considered in calculating the temperature and pressure of geothermal wells.

关 键 词：地热井 钻井液 黏度 密度 温压耦合 

分 类 号：TE254[石油与天然气工程—油气井工程]