基于地磁参数和子午线收敛角计算的井斜方位角校正方法

Hole Azimuth Angle Correction Methods Based on Geomagnetic Parameters and Meridian Convergence Angle Calculation

摘要:

井斜方位角的校正对于定向井轨迹控制、中靶分析有非常重要的意义。通过分析大地坐标与高斯克吕格投影坐标之间的关系，根据地磁场球谐函数模型，地磁参数和子午线收敛角的计算模型，提出了实现方式和求解步骤，并编制了相应的计算软件。通过实例计算与分析，表明地磁参数和子午线收敛角的准确计算对于定向井轨迹控制的重要性。

Abstract:

Hole azimuth angle correction is very important in directional well trajectory control and target-hitting analysis. By the analysis on the relationship between geodetic coordinate and Gauss-Kruger projection coordinate; and based on the geomagnetic field spherical harmonics model, geomagnetic parameters and meridian convergence angle calculation model, the realizing way and the solving steps are put forward and corresponding calculation software are programmed. With the practical calculation and analysis, the importance of accurate calculation of geomagnetic parameters and meridian convergence angle in directional well trajectory control is shown.