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| 考虑温度影响的摩阻扭矩计算模型及应用 |
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张辉1,谭天一1,李军1,王昊1,曾义金2,丁士东2,陶谦2
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(1.中国石油大学(北京)石油工程学院,北京102249;2.中国石油化工股份有限公司石油工程技术研究院,北京 100101)
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| 摘要: |
| 管柱在井下受热,产生的热应力会改变管柱轴向力,影响摩阻扭矩的计算。通过实验测量钻井液在不同温度下的润滑系数和泥饼黏滞系数,拟合出其随温度变化关系,结合热应力的作用,建立考虑温度影响的摩阻扭矩计算模型。实验结果表明,KCl聚合物润滑钻井液和油基钻井液的润滑系数和泥饼黏滞系数随温度升高而增大。应用该模型对涪陵页岩气焦石坝区块X井进行摩阻扭矩计算,得出考虑温度影响的计算模型顶驱扭矩误差为3.7％,大钩载荷误差为4.4％,计算精度较高。 |
| 关键词: 摩阻扭矩 钻井循环温度 润滑系数 泥饼黏滞系数 摩阻系数 涪陵页岩气 |
| DOI：10.3969/j.issn.1673-5005.2019.01.008 |
| 分类号::TE 21 |
| 文献标识码:A |
| 基金项目:国家自然科学基金重点项目(U1762211,51734010)；国家自然科学基金面上项目(51574262,51774304)；国家科技重大专项课题(2017ZX05009-003) |
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| A torque and drag calculation model with consideration of temperature effect and its application |
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ZHANG Hui1, TAN Tianyi1, LI Jun1, WANG Hao1, ZENG Yijin2, DING Shidong2, TAO Qian2
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(1.College of Petroleum Engineering in China University of Petroleum(Beijing), Beijing 102249, China;2.SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China)
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| Abstract: |
| When drill pipes are subjected to variable circulating temperatures in the wellbore, the thermal stress induced will change the axial forces on the pipes, which can affect the calculation of the torque and drag. In this study, the effects of temperature on the lubricity coefficient and cake frictional coefficient of drilling fluids were measured via indoor experiments, and a torque and drag prediction model was established considering the effect of temperature on the friction coefficient and axial force. The results show that both the lubricity coefficient and cake frictional coefficient of KCl polymer drilling fluids and oil based drilling fluids can increase with temperature. A case study for well drilling in Fuling Jiaoshiba region was conducted, and the results show that the errors of the top drive torque and hook load can be of 3.7％ and 4.4％, respectively, when the effect of temperature is not considered. |
| Key words: torque and drag drilling circulating temperature lubricity coefficient cake frictional coefficient friction coefficient Fuling shell gas |
