多参数激电测深在敬信盆地探测工作中的应用

以往的物探方法探测、划分深部地层多以电阻率为主要物性参数.本次工作采用半衰时（TH）、衰减度（DD）、偏离度（RR）、综合参数（ZP）及含水指示参数，通过含水多寡来区分岩层的含砂量，并以此作为地层划分的依据.通过实际工作还证明，很多激电方法得不到很好的测量效果，或者异常不明显，造成这种结果的主要因素是供电功率过低和供电周期过短.尝试加大供电功率和加长供电周期是十分必要的.这次尝试取得了较为理想的结果，并取得了敬信盆地的性质为断陷盆地的新的认识.

APPLICATION OF MULTI-PARAMETER IP SOUNDING IN THE EXPLORATION IN JINGXIN BASIN

In traditional geophysical exploration,resistivity is commonly used as main parameter to detect and divide deep strata. In this case study,the parameters of half decay time,decay degree,deviation degree,composite parameter and water indicator are adopted to detect the water content and then the sand content in strata,which would be the basis for stratum division. The practice also confirms that the low power and short period of power supply are the main reasons for the poor effect and less obvious anomaly in most IP sounding survey. It is necessary to increase the power and period of power supply. This practice obtains an ideal result and acquires the new cognition that the Jingxin Basin is of a fault basin.