MULTI-STATION ANALYSIS OF MAGNETIC SURVEYS

摘要

A multi-station gravity and magnetic survey is carriedout in a borehole. The data from the survey are processed to estimatethe inclination and azimuth of the borehole. The drill collar relativepermeability is estimated, and the estimated drill collar permeability isthen used to remove the effects of induced magnetization of the drillcollar on the magnetic measurements.