笔架岭松散地层大位移井减摩减扭技术研究

发布时间：2018-04-16 07:46

本文选题：松散地层 + 摩阻扭矩　；参考：《东北石油大学》2017年硕士论文

【摘要】：笔架岭区块的造斜段主要以砂砾岩与泥岩呈不等厚互层,砂岩地层胶结疏松、压实性差,泥岩地层蒙脱石含量高,遇水极易发生膨胀。在大位移井的施工过程中,随着井深的增加,摩阻扭矩呈现指数型的增长,同时伴随出现的携砂等问题,更加增大了扭矩及摩阻对后期施工的影响,因此减摩减扭技术是保证笔架岭松散地层大位移井顺利施工的关键。本文针对笔架岭区块的地层特性和该区块大位移井施工的技术难点,根据软绳模型和刚杆模型适应的井眼曲率和钻柱特征,得出使用刚杆模型进行该区块大位移井摩阻扭矩计算分析的结论;通过控制井眼轨迹,合理匹配钻具组合,以及实施井眼清洁技术,减小架岭区块大位移井施工中的摩阻和扭矩;根据由滑动摩擦变为滚动摩擦降低钻柱摩阻、旋转半径从工具接头直径硬摩擦变为等于管身直径的有效半径轴承摩擦来达到降低扭矩的理念,设计了机械式减摩减扭工具,在减少井下钻具的扭矩摩阻损失的基础上同时实现了对套管的保护作用。通过以上技术措施的制定,实现了笔架岭松散地层大位移井的有效减摩减扭,并以架岭607-01-9井为例,对其井眼净化技术以及减摩减扭效果进行了实际应用分析。
[Abstract]:The diagenetic section of Bijialing block is mainly composed of sand gravel and mudstone with unequal thickness interbedded, sandstone formation is loose cemented, compactness is poor, mudstone formation montmorillonite content is high, and it is easy to expand when water is encountered.In the construction process of the extended reach well, with the increase of well depth, the friction torque increases exponentially, and with the problems of sand carrying, it increases the influence of torque and friction on the later construction.Therefore, the technology of reducing friction and torsion is the key to ensure the construction of the extended reach well in the penholder ridge loose formation.In this paper, according to the characteristics of borehole curvature and drill string of soft rope model and rigid pipe model, according to the formation characteristics of Bijialing block and the technical difficulties in the construction of large-reach wells in the block, the characteristics of borehole curvature and drill string are analyzed.The conclusion is that the rigid rod model is used to calculate and analyze the friction torque of the extended reach well in this block, and the hole cleaning technology is implemented by controlling the well trajectory, matching the drilling tool combination reasonably, and implementing the borehole cleaning technology.Reducing friction and torque in construction of extended reach well in Jialing block, reducing friction of drill string according to sliding friction to rolling friction,The rotation radius is changed from the hard friction of the tool joint diameter to the effective radius bearing friction equal to the diameter of the pipe body to achieve the idea of reducing torque. A mechanical friction reducing and torsion reducing tool is designed.On the basis of reducing the torque friction loss of downhole drilling tools, the protective effect of casing is realized at the same time.Through the formulation of the above technical measures, the effective friction-reducing and torsion reduction of the extended reach well in the penholder ridge loose formation is realized. Taking well Jialing 607-01-9 as an example, the hole purification technology and the effect of friction-reducing and torsion reduction are analyzed in practice.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE24

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