石油勘探与开发Issue(3)：354-358,5.DOI:10.11698/PED.2014.03.12
空间圆弧轨迹的井斜演化规律及控制模式
Evolution pattern and control mode of well deviation for circular-arc trajectories in space
摘要
Abstract
The well deviation equation of circular-arc trajectory in space was established, the solution methods to determine the posture of the inclined plane that the circular-arc trajectory lies on and the extreme value of inclination angle of the circular-arc trajectory were presented, and the evolution pattern and control mode of well deviation for circular-arc trajectories in space was revealed. Some parameters can be calculated by the forward model and inverse model respectively, including the inclination angle and azimuth angle at any point along a circular-arc trajectory, the inclined angle and inclined azimuth angle of the inclined plane that the circular-arc trajectory lies on and the various parameters at the point with extreme inclination angle, and the calculated results from the forward model are the same as those from the inverse model. There are two points with extreme inclination angles along a circular-arc trajectory or its trendline, and the tangent lines of wellbore trajectory at the points with minimum and maximum inclination angles point to downdip and updip directions of the inclined plane respectively, the bending angle and azimuth angle differences between the two points are both 180°. The posture of inclined plane and parameters at extreme inclination points relate to the inclination angle and tool face angle at the beginning point of well interval, but have nothing to do with the interval length. The inclined angle mode for controlling a circular-arc trajectory is ambiguous, so the tool-face angle or directional azimuth angle modes should be used.关键词
钻井理论/定向钻井/井眼轨迹/井斜演化Key words
drilling theory/directional drilling/wellbore trajectory/well deviation evolution分类
能源科技引用本文复制引用
刘修善,苏义脑..空间圆弧轨迹的井斜演化规律及控制模式[J].石油勘探与开发,2014,(3):354-358,5.基金项目
国家重点基础研究发展计划（973计划）“深井复杂地层安全高效钻井基础研究”（2010CB226700）；国家科技重大专项“海相碳酸盐岩油气井井筒关键技术” （）
