大位移钻井底部钻具组合设计及定向钻井特性分析

发布时间：2018-01-10 06:10

本文关键词：大位移钻井底部钻具组合设计及定向钻井特性分析　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

更多相关文章： 稳定器 动力钻具 钻柱力学 定向井

【摘要】：大位移钻井技术是海上和滩海油田勘探开发最有效的手段,可以降低油田开发成本,具有显著的经济效益。针对冀东油田当前和今后钻井施工要面临的难题,开展大位移钻井的关键技术研究,重点是对大位移钻井裸眼延伸极限评估、摩阻／扭矩与套管磨损预测、底部钻具组合优化设计及定向钻井工艺和大位移钻井岩屑床形成机理及清除技术等方面进行研究,形成一套适用于南堡滩海中深层的大位移井的常规钻井配套技术。为冀东南堡油田的高效开发和现场施工提供可靠、有效的技术支持,同时也为类似油田的开发提供成熟、适用、高效的配套技术,以取得最佳的综合效益。底部钻具组合(简称：BHA)一般由钻头结构单元、钻铤结构单元及稳定器结构单元等组成,它们处在井眼里弯曲的三维空间内。钻井过程中对处在三维空间内的BHA进行分析研究的对象有钻压、扭矩、钻井液浮力、井壁支撑反力及承受自重等载荷等。在钻柱力学长期发展中先后产生了以下这些方法：经典微分方程法、有限差分法、能量法、纵横弯曲连续梁法、有限元法和加权余量法。这些方法都是经过研究者不断优化发展得道的。想要BHA这种多跨连续纵横的弯曲梁柱的受力和变形进行完全解析时需要考虑的影响因素非常繁多。我们可以说完全解析是不太现实的,因此使用半解析法和数值法求解BHA受力和变形问题是可行的。BHA的结构性能直接决定钻井过程中眼轨迹质量的优劣。无论是滑动钻进还是复合钻进,定向井中的BHA大多有造斜能力,其造斜率主要取决于BHA所产生侧向力的大小。为了研究问题的方便,利用所编的BHA计算程序,对钻具组合进行分析时采用控制变量的方法,通过控制其它变量不发生变化,研究侧向力随某个变量的变化规律,实现定向井井眼轨迹的精确控制。
[Abstract]:Large displacement well drilling technology is the most effective means of maritime and offshore oil exploration and development, can reduce the cost of oilfield development, has significant economic benefits. In view of the current and future construction of Jidong Oilfield drilling to face the problem, the research on the key technology of large displacement drilling, the focus is extended Limit Evaluation on large displacement drilling borehole, friction drag / torque and casing wear prediction of BHA optimization and directional drilling technology and large displacement drilling cuttings bed formation mechanism and cleaning technology, formed a set of suitable for large displacement wells deep in Nanpu beach in conventional drilling technology. For the efficient development of Jidong Nanpu oilfield and site construction to provide reliable and effective technical support, but also for the development of similar oil fields to provide mature, applicable, efficient matching technology, to achieve the best overall efficiency. The bottom of the hole Combination (abbreviation: BHA) by the general structure of the drill collar structure unit, unit and stabilizer structure unit, they are in a three-dimensional space curved wellbore. The drilling process in three-dimensional space BHA analysis with drilling pressure, torque, drilling fluid buoyancy, shaft support force and bearing self weight load. In the long-term development of drill string mechanics has produced the following methods: classical differential equation method, finite difference method, energy method, beam method, finite element method and weighted residual method. These methods are all of the researchers continue to optimize the development of enlightenment. The influence factors of BHA to multi span continuous vertical bending beam stress and deformation were fully analyzed to be considered very many. We can say that the full resolution is not too realistic, so using the semi analytical method and numerical method BHA The stress and deformation of the problem is feasible.BHA structure performance directly determines the trajectory in the process of drilling quality. Whether sliding drilling or composite drilling, directional wells BHA mostly whipstocking capacity, the build-up rate mainly depends on the BHA generated lateral force. In order to study the problem of the convenient calculation program using the series BHA, method of control variables were analyzed using the BHA, by controlling other variables does not change with the variation of a variable lateral force, realize accurate control of directional well trajectory.

【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE243;TE921

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