Accurate calibration method Mwd system and its application

The present invention discloses a method for the precise calibration and Application of a MWD system, the accurate calibration method is: use error model for real-time solution MWD system attitude angle calculation results of the calibration. The present invention is in the inclination and azimuth set value unchanged, by using the error model MWD attitude angle calibration system, which can effectively reduce the inclination, azimuth wave solver results, eliminate posture angle solver during the systematic errors due to the inclination and azimuth measurements is to guide the drilling rig, so accurate calibration method of the present invention can effectively help to precisely control well trajectory and increase drilling accuracy. In addition, precise calibration algorithm of the present invention can also be extended to automatic vertical drilling system, rotating guide and other products of the calibration process.