位场变换是地磁(重力)场数据处理系统的重要组成部分。根据位场变换结果可以从实测地磁(重力)场的数据中提取大量有用信息,因而它的应用大大丰富了重、磁异常的解释方法,从而提高重、磁异常解释成果的可靠程度,而位场分量之间的相互换算又是位场变换中的一个重要问题。尤其是对于直孔的井中磁测,由于△H至今仍无法实 Field shift is an important part of geomagnetic (gravity) field data processing system. According to the result of the field-field transformation, a great deal of useful information can be extracted from the data of the measured geomagnetic (gravity) field. Therefore, its application greatly enriches the explanations of heavy and magnetic anomalies and improves the reliability of interpretation results of heavy and magnetic anomalies. The mutual conversion between field components is also an important issue in the field-field transformation. Especially for the straight borehole magnetometer, due to △ H still can not be true