西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (1): 84-90.DOI: 10.11885/j.issn.1674-5086.2018.07.19.04

• 石油与天然气工程 • 上一篇    下一篇

基于钻柱动力学的井筒摩阻系数预测与应用

宋巍1, 胡中志2, 周岩1, 沈园园1, 魏纳3   

  1. 1. 中国石油冀东油田钻采工艺研究院, 河北 唐山 063200;
    2. 四川轻化工大学机械工程学院, 四川 自贡 643000;
    3. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川 成都 610500
  • 收稿日期:2018-07-19 出版日期:2020-02-10 发布日期:2020-02-10
  • 通讯作者: 胡中志,E-mail:40898672@qq.com
  • 作者简介:宋巍,1985年生,男,汉族,河北唐山人,工程师,主要从事钻井工艺方面的研究工作。E-mail:jd_sw@petrochina.com.cn;胡中志,1981年生,男,汉族,黑龙江桦川人,高级工程师,主要从事油气井工程方面的研究工作。E-mail:40898672@qq.com;周岩,1983年生,男,汉族,吉林松原人,工程师,主要从事钻井工艺方面的研究工作。E-mail:jdzc_zhouyan@petrochina.com.cn;沈园园,1984年生,女,汉族,湖北黄冈人,工程师,主要从事钻井工艺方面的研究工作。E-mail:zcy_shenyy@petrochina.com.cn;魏纳,1980年生,男,汉族,四川成都人,副教授,博士,主要从事海洋天然气水合物绿色钻采技术、控压钻井、欠平衡钻井与气体钻井系列技术井下流动控制理论及实验评价研究。E-mail:weina8081@163.com

Prediction and Application of the Shaft Friction Coefficient Based on Drill-string Dynamics

SONG Wei1, HU Zhongzhi2, ZHOU Yan1, SHEN Yuanyuan1, WEI Na3   

  1. 1. Drilling Technology Research Institute, Jidong Oilfield, PetroChina, Tangshan, Hebei 063200, China;
    2. School of Mechanical Engineering, Sichuan University of Science&Engineering, Zigong, Sichuan, 643000, China;
    3. State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2018-07-19 Online:2020-02-10 Published:2020-02-10

摘要: 井筒摩阻系数是钻井设计和施工阶段准确预测和控制摩阻扭矩的关键因素,对比摩阻扭矩的实测值与预测值可预防钻井事故的发生。为此,基于钻柱动力学摩阻扭矩计算模型,结合近钻头多参数测量仪实测数据,开展了大斜度井实钻条件下套管段和裸眼段摩阻系数的预测方法研究,结果成功应用于同类型邻井的三开钻进阶段摩阻扭矩分析与控制。现场应用结果表明,实钻井筒套管内摩阻系数0.27~0.29,裸眼段摩阻系数0.39~0.41,均高于经验值;案例井钩载和扭矩预测值与实际值的误差满足施工精度要求,依托摩阻扭矩预测图版实时监测实钻摩阻扭矩的异常变化,保障了该井顺利施工。研究结果可为大斜度井钻机设备优选、井身剖面优化和现场钻井施工方案决策等提供科学依据。

关键词: 钻柱动力学, 摩扭预测, 摩阻系数, 计算模型, 现场应用

Abstract: Accurate prediction and control of friction torque during the design and construction of drilling phases can prevent drilling accidents, and the shaft friction coefficient is a key factor in predicting friction torque. Therefore, we predicted the friction coefficients for the casing and open-hole sections for highly-deviated well drilling based on a calculation model for friction torque. This was based on drill-string dynamics and data from a near-bit, multi-parameter measuring instrument. The results were successfully applied to the analysis and control of friction torque in the third-spud drilling stage of adjacent wells of the same type. The field application results revealed that the friction coefficient of the actual drill casing was 0.27~0.29, and the friction coefficient of the open hole was 0.39~0.41, both of which are higher than the empirical values. The error between the predicted and actual values of the hook load and the torque of the case satisfied the construction accuracy requirements. The friction torque during actual drilling was monitored in real time to detect abnormal changes based on the friction torque prediction chart, which ensured smooth construction of the well. The results provide a scientific basis for optimizing drilling equipment and the well profile of highly deviated wells, and for planning the on-site drilling construction.

Key words: drill-string dynamics, friction torque prediction, friction coefficient, computation model, field application

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