FIELD: industrial geophysics.
SUBSTANCE: method includes measuring gravity force acceleration by inclinometer via two mutually perpendicular axes and well zenith angle is calculated. Components of Earth magnetic field full vector are measured. Ferro-probe, positioned along Z axis in West-East plane is continuously controlled. In such a method azimuth will be proportional to angle of frame rotation, determined by acceleration meters. Azimuth is calculated from received data. To avoid azimuth error near critical plane, azimuth calculation is performed on basis of two given mathematical expressions. Then difference between calculated values is constantly determined. In case of proximity of equipment direction to critical plane, passing through Earth magnetic field vector and axis West-East in magnetic coordinates system, azimuth calculation is performed on basis of one of formulae with consideration of predetermined error.
EFFECT: higher precision.
5 dwg
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