瞬变电磁法矩形回线源一维正演研究

Study on one-dimensional forward calculation of rectangular loop source by transient electromagnetic method

瞬变电磁法矩形回线源在实际生产中应用广泛,但其数据处理不成熟,回线内多以圆回线源近似处理,回线外一定距离多以电偶极子近似处理,无法准确计算回线源附近的场。本文推导得到矩形回线源的内外以及源附近的瞬变响应公式,实现其一维数值模拟的正演计算,使得场值计算更准确,更具有实际意义。

The rectangular loop source of transient electromagnetic method is widely used in practical production.However,its data processing is not mature.The circular loop source is often used in the loop and the electric dipole is often used to approximate a certain distance outside the loop,which might result in less accurate calculation of the field near the loop source.In this paper,the transient response formulas of the inside and outside of the rectangular loop source and near the source are derived,and the forward calculation of one-dimensional numerical simulation is realized,which makes the field value calculation more accurate and has greater practical significance.