saturation induction

According to the features of third harmonic excitation and the relationship between harmonic winding induction potential and amplitude coefficient, the text approaches and analyzes the effect of the change of pole field waveform caused by the magnetic saturation ration on the harmonic winding induction potential.

根据三次谐波励磁的特点，以及谐波绕组感应电势与谐波磁场幅值系数之间的关系，探讨分析了磁饱和度对磁极磁场波形的改变，从而对谐波绕组感应电势的影响。

The effect of mud invasion into formation and mud soak time in formation on the dual laterolog and dual induction log can be known through time-lapse logging, which is important to determine oil saturation exactly and reduce the mud invasion influence.

利用时间推移测井找出泥浆浸泡时间对油气层双感应、双侧向测井浸入规律，为准确确定含油饱和度、减小泥浆侵入的影响有着很重要的作用。

The test shows that the material with high saturation induction intension can obtain good open response.

试验表明高饱和磁感应强度的材料可获得较好开启响应.