摘要
在推导阵列感应测井偏心几何因子及其数值计算的基础上,分析了Doll偏心几何因子的特性,讨论了线圈距和地层电导率变化对带推迟效应偏心几何因子的影响。偏心时几何因子与居中时几何因子有较大的差别,表明偏心将导致异常井眼响应。长线圈距和高的地层电导率增大了推迟效应,实部信号下降,虚部信号增大。此外还讨论了频率和偏心距对偏心几何因子的影响。这些结果可用于实现快速井眼校正和井眼影响解释。
Based on the derivation of the eccentric geometrical factor of array induction and its numerical computation,the features of Doll eccentric geometric factor are analyzed,and the influence of coil spacing and conductivity on the eccentric geometric factor with the time delay effect is discussed.Compared the center geometrical factor,the eccentricity will generate high borehole effect.The long coil spacing and high formation conductivity enhance the time delay effect.The real part of signal will decreases and its imaginary will increases.These results can be applied to the fast borehole correction and explanation of the abnormal borehole effect.
出处
《石油仪器》
2006年第2期38-40,3,共3页
Petroleum Instruments
关键词
阵列感应测井
偏心几何因子
推迟效应
array induction logging,eccentric geometric factor,time delay effect
