摘要
井眼轨迹间相互关系的描述与计算，主要应用于邻井的防碰、救援井和定向井的中靶、井眼轨迹的监测与控制，以及实钻轨迹的质量评价等。使用时，一般将障碍物作为比较轨迹（或将设计轨迹作为基准轨迹），而将需要监测的设计轨迹或实钻轨迹作为基准轨迹（而将实钻轨迹作为比较轨迹），当比较轨迹与基准轨迹基本正交时，最近距离将接近于法面距离；如果基准轨迹是垂直井段，则法面距离将退化为水平距离。通过引入扫描角和法面偏角的概念，将球面坐标形式的最近距离扫描图分解为以两个极坐标形式表示的平面图，从而保证视图的科学性、完整性和实用性。
The description and calculation of relative positions of wellbore trajectories are widely applied to preventing the collision of any wellbore with its neighbor wells, hitting the target of a rescue well or a directional well, monitoring and controlling a wellbore trajectory, evaluating the quality of an actual surveyed trajectory, etc.This paper describes the calculation principles of horizontal distance, normalplane distance and the nearest distance, and how to draw scanning charts and how to select and use them. By means of introducing the concepts of scan angle and offset-normal angle, a scanning chart of the nearest distance shown in spherical coordinate system is resolved into two plane figures with polar coordinates. As a result, this kind of view is proved to be scientific, integral and practical.
出处
《钻采工艺》
CAS
1999年第3期7-12,共6页
Drilling & Production Technology
关键词
井眼轨迹
数学模型
数学分析
钻井
hole trajectory, mathematical model, mathematical analysis, drilling theory
