作　　者： ; ; ; ;

机构地区： 中国石油天然气集团公司

出　　处： 《石油钻探技术》 2007年第1期20-22,共3页

摘　　要： 水平井靶体设计要求中只规定了靶窗和靶底的横向和纵向偏差,并要求井眼轨迹在靶体内。但在实钻轨迹监控、井身质量评价中,需要对“井眼轨迹在靶体内”进行定量描述。将靶窗(靶底)的横向和纵向偏差的概念推广到靶体轴线任意点,定义了实钻轨迹相对于靶体轴线的偏差率和偏差方向角,建立了定量描述“井眼轨迹在靶体内”的偏差率模型,提出了根据实钻测斜数据计算井眼轨迹偏差率的数值算法。根据沿靶体轴线的偏差率和偏差方向角数据制作的偏差率圆,可以为“井眼轨迹在靶体内”提供最直观的认识。 Currently, target design of the horizontal well only specifies the lateral and vertical deviation for the target window and target bottom, and requires that the well trajectory should be within the target zone. While in actual well trajectory monitor and the evaluation of the wellborn quality, quantitative description is required to describe the accurate position of well trajectory within the target zone. The concept of lateral and vertical deviation of the target window （target bottom） was expanded to the arbitrary point in target axis. The deviation percent and deviation azimuth of actual trajectory relative to target axis were defined. A deviation percent model was established to quantitatively describe the actual position of well trajectory within the target zone. A numerical algorithm was proposed to compute the deviation percent using measured data. The circle diagram based on deviation percent and azimuth along target axis provides a direct impression of how the well trajectory is changing within target zone.

关 键 词： 水平井 井眼轨迹 偏差 数学模型

领　　域： [石油与天然气工程]