自然参数法测斜计算的精度分析

Computation Precision Analysis of Wellbore Trajectory by Natural Parameter Method

自然参数法是继圆柱螺线法和最小曲率法之后提出的一种测斜计算新方法,在井眼轨迹设计与计算中有着广泛的用途。使用数学试验方法对自然参数法的计算精度进行分析发现,自然参数法与圆柱螺线法和最小曲率法计算出的井底距离平均相差约每千米0.02 m和0.2 m。统计分析和实际算例表明,自然参数法用于旋转钻进和滑动钻进井段都具有很高的计算精度。

Natural Parameter Method is a kind of new method of wellbore trajectory computation succeeding Cylinder Helix Method （Radius of Curvature Method） and Minimum Curvature Method. The method is widely used in wellbore trajectory design and computation. By comparing and analyzing Natural Parameter Method with Cylinder Helix Method （Radius of Curvature Method） and Minimum Curvature Method, average discrepancies of computational bottom hole spacing are about 0. 02m and 0. 2m per kilometer respectively. Both statistical analysis and practical computation examples show that it is suitable for rotary system and slipping system and has high computation precision.