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论述了磁偏角和子午线收敛角校正在定向井轨迹计算中的重要性,介绍了磁偏角及子午线收敛角的定义和性质。虽然SY/T5435—2003《定向井轨道设计与轨迹计算》要求:“方位角应进行磁偏角和子午线收敛角校正。”可是国内很多油田并没有执行此规定,本文针对标准展开剖析,再次论证开展子午线收敛角校正的必要性。
The importance of declination between magnetic declination and meridian convergence in the calculation of directional well trajectory is discussed. The definitions and properties of declination angle and meridian convergence angle are introduced. Although SY / T5435-2003 “Directional Well Track Design and Trajectory Calculation” requires: “The azimuth should be corrected for the magnetic declination and the meridian convergence angle.” However, many domestic oil fields do not implement this regulation. In this paper, The necessity of carrying out the correction of meridian convergence angle is demonstrated again.