时域激电单极～偶极测深数据转换为偶极～偶极测深数据及其二维反演对比

THE DATA FROM POLE-DIPOLE ARRAY SOUNDING CHANGED INTO THE DATA OF DIPOLE-DIPOLE ARRAY SOUNDING AND THEIR TWO-DIMENSION INVERSION COMPARISON FOR TIME DOMAIN INDUCED POLARIZATION METHOD

这里简述和图示了单极~偶极、偶极~偶极装置测深原理及野外布极方式。根据单极~偶极装置视电阻率与偶极~偶极装置视电阻率存在的内在关系以及＂等效电阻率法＂,推导出了偶极~偶极装置视极化率与单极~偶极装置视极化率的数学表达式。将时域激电单极~偶极装置测得电参数的数据,转换为偶极~偶极装置的数据,并对二种测深装置视电阻率、视充电率分别进行二维反演、成图及对比,结合测区简要地质特征,显示二种装置测深取得了较好的地质勘探效果。最后,分析了这二种装置测深反演结果相异的原因。

This paper describe the sounding principle and the electrodes lay mode for pole-dipole array and dipole-dipole array.According 'the equivalent resistivity method',and the resistivity internal relationships between pole-dipole and dipole-dipole,we derive the mathematical equation for dipole-dipole array chargeability whit pole-dipole array chargeability.And we can also change electro-parameter data acquired by pole-dipole array into dipole-dipole array data,in addition,we make two-dimension inversion,plot imaging and comparison for the two sounding array resistivity and chargeability parameter.Finally,we analysis different result of two-dimension inversion causation for the two sounding array electro-parameter.