架岭区块大位移钻井关键技术研究
发布时间：2018-08-03 13:16
【摘要】：大位移水平井钻井工艺及其相关技术,在世界各国海洋石油的开发当中,均有着十分广阔的应用前景。目前我国海上已发现的一百余个油田构造以及油气田当中,约有一半为储量不足1000万吨的边际小油气田,因此如果采用大位移钻井技术,能够对此类油田进行有效地开发,并能够节省油田大量的开发费用,为快速高效的开发储量较小的断块油田以及边际油田提供了有效的手段,因此具有广泛的应用前景。然而在大位移井技术的应用过程当中,由于受钻井地区特殊环境的影响,导致大位移井钻井技术无法达到预期的开发效果。本文首先对大位移井的关键技术进行了探讨,之后对大位移井的磨阻扭矩进行了研究分析,得到了不同工况下摩阻扭矩的递推计算公式,并通过大位移井环空流体力学相关理论,得到了大位移井井内岩屑的启动速度以及启动应力,进而通过室内实验研究了钻井液流变性对井筒中岩屑启动速度的影响,以及井筒内岩屑悬浮速度的影响影响因素,结合大位移井水基钻井液的技术要点,对钻井液性质进行了分析在此基础上,针对辽河油田架岭611井大位移井施工的难点问题,即海水渗入问题、造斜困难问题、岩屑返出困难问题、泥包问题、摩阻和扭矩过大问题、三开钻进携岩问题以及套管不到位问题结合现场实际情况,进行了解决,为大位移井技术在笔架岭地区的应用提供了理论依据和实际指导。
[Abstract]:The drilling technology and its related technology of extended reach horizontal well have a very broad application prospect in the development of offshore oil all over the world. At present, about half of the more than 100 oil structures and oil and gas fields discovered offshore in China are marginal small oil and gas fields with less than 10 million tons reserves. Therefore, if we adopt the technology of large displacement drilling, we can effectively develop this kind of oil fields. And it can save a large amount of development costs, which provides an effective means for rapid and efficient development of fault block oil fields with small reserves and marginal oil fields, so it has a wide application prospect. However, during the application of the extended reach well technology, due to the influence of the special environment in the drilling area, the drilling technology of the extended reach well can not achieve the expected development effect. In this paper, the key technology of the extended reach well is discussed, and then the friction torque of the extended reach well is studied and analyzed, and the recursion calculation formula of friction torque under different working conditions is obtained. Based on the theory of annulus hydrodynamics, the start-up velocity and stress of cuttings are obtained, and the influence of rheology of drilling fluid on the start-up velocity of cuttings is studied through laboratory experiments. As well as the influencing factors of cuttings suspension velocity in wellbore, combined with the technical essentials of water-base drilling fluid in extended reach well, the properties of drilling fluid are analyzed. On this basis, the difficult problems in the construction of extended reach well of Jialing 611 well in Liaohe Oilfield are pointed out. That is, the problem of seawater infiltration, the problem of making slope, the problem of cuttings returning, the problem of mud ladle, the problem of excessive friction and torque, the problem of rock carrying in three open drilling, and the problem of casing not being in place are solved in combination with the actual situation on the spot. It provides a theoretical basis and practical guidance for the application of the extended-reach well technology in the penholder-Ridge area.
【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】：TE52
，
本文编号：2161861
[Abstract]:The drilling technology and its related technology of extended reach horizontal well have a very broad application prospect in the development of offshore oil all over the world. At present, about half of the more than 100 oil structures and oil and gas fields discovered offshore in China are marginal small oil and gas fields with less than 10 million tons reserves. Therefore, if we adopt the technology of large displacement drilling, we can effectively develop this kind of oil fields. And it can save a large amount of development costs, which provides an effective means for rapid and efficient development of fault block oil fields with small reserves and marginal oil fields, so it has a wide application prospect. However, during the application of the extended reach well technology, due to the influence of the special environment in the drilling area, the drilling technology of the extended reach well can not achieve the expected development effect. In this paper, the key technology of the extended reach well is discussed, and then the friction torque of the extended reach well is studied and analyzed, and the recursion calculation formula of friction torque under different working conditions is obtained. Based on the theory of annulus hydrodynamics, the start-up velocity and stress of cuttings are obtained, and the influence of rheology of drilling fluid on the start-up velocity of cuttings is studied through laboratory experiments. As well as the influencing factors of cuttings suspension velocity in wellbore, combined with the technical essentials of water-base drilling fluid in extended reach well, the properties of drilling fluid are analyzed. On this basis, the difficult problems in the construction of extended reach well of Jialing 611 well in Liaohe Oilfield are pointed out. That is, the problem of seawater infiltration, the problem of making slope, the problem of cuttings returning, the problem of mud ladle, the problem of excessive friction and torque, the problem of rock carrying in three open drilling, and the problem of casing not being in place are solved in combination with the actual situation on the spot. It provides a theoretical basis and practical guidance for the application of the extended-reach well technology in the penholder-Ridge area.
【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】：TE52
，
本文编号：2161861
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