石油学报 ›› 2015, Vol. 36 ›› Issue (7): 890-896.DOI: 10.7623/syxb201507014

• 石油工程 • 上一篇    下一篇

井斜控制方案设计方法

刘修善1, 苏义脑2   

  1. 1. 中国石油化工股份有限公司石油工程技术研究院 北京 100101;
    2. 中国石油天然气集团公司钻井工程技术研究院 北京 102206
  • 收稿日期:2015-02-03 修回日期:2015-05-30 出版日期:2015-07-25 发布日期:2015-08-06
  • 作者简介:刘修善,男,1962年11月生,1984年毕业于大庆石油学院,1998年获石油勘探开发科学研究院油气井工程专业博士学位,现为中国石油化工集团公司高级专家、石油工程技术研究院首席专家、教授级高级工程师,主要从事导向钻井工艺、井下信息测量与控制等方面的研究工作。Email:liuxs.sripe@sinopec.com
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2010CB226705)和国家重大科技专项(2011ZX05005-006)资助。

A design method of borehole deviation control scheme

Liu Xiushan1, Su Yinao2   

  1. 1. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China;
    2. CNPC Drilling Research Institute, Beijing 102206, China
  • Received:2015-02-03 Revised:2015-05-30 Online:2015-07-25 Published:2015-08-06

摘要:

井斜控制方案设计是有效控制井眼轨迹的首要环节,在定向钻进过程中普遍应用。基于空间圆弧轨迹模型,提出了井斜控制方案的交互式设计方法,解决了一些参数的多值性问题,揭示了特殊扭方位方式的适用条件,阐述了用于增、降斜的初始工具面角范围。结果表明:交互式设计方法具有优化设计和结果校验功能,现场使用方便;初始工具面角等参数的多值性问题不能简单地用井斜角增量来判别,而是取决于扭方位终点的井斜变化率;稳斜扭方位和全力扭方位应限定在一定的井段范围内使用,其范围可用许用弯曲角来表征;稳斜扭方位的许用弯曲角不超过180°,全力扭方位的许用弯曲角不超过90°。稳斜扭方位井段由增斜和降斜2部分组成,其增、降分界点为井段中点;扭方位井段的增、降斜趋势可用初始工具面角来判别,而初始工具面角的增、降斜分界线或区域取决于始点井斜角。应用实例验证了研究结果的科学性和适用性。

关键词: 钻井理论, 定向钻井, 井眼轨迹, 数学模型, 计算方法

Abstract:

As a primary step of effectively controlling borehole trajectory, the design of borehole deviation control scheme has been widely applied in the process of directional drilling. Based on the spatial arc trajectory model, an interactive design method was proposed for the borehole deviation control scheme in this study, so as to solve the multi-valuedness problem of certain parameters, reveal the applicable conditions of special direction-turn modes, and describe the range of initial tool face angle for deviation gain or drop. The research results show that this interactive design method has optimal design and result check functions, and is easy to use onsite; the multi-valuedness problem of certain parameters, such as initial tool face angle, cannot be judged simply by deviation increment, but depends on the deviation rate at the terminal of direction turn; the steady-inclined and full direction turns should be limited within a certain well interval, which is can be characterized by allowable bending angle; the allowable bending angle of steady-inclined and full direction turns is unable to exceed 180° nor 90° respectively. The interval of steady-inclined direction turn is composed of two parts, i.e., deviation gain and drop with the midpoint of interval as the demarcation. The deviation gain or drop tendency of direction turn can be discriminated by initial tool face angle, while the demarcation line or area for initial tool face angle depends on the deviation angle at the starting point. The scientific and applicable research results have been validated by application examples.

Key words: drilling theory, directional drilling, wellbore trajectory, mathematical model, calculation method

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