冲击大电流测试方法与实验研究

在电阻率测井和地层测试等过程中，为了提高对介质的探测深度，希望采用尽可能大的测试电流。但大电流的产生不仅增大了电源的技术难度，而且使整个系统的体积、功耗、成本都增大。文章提出了一种利用低能电源产生冲击大电流的方法，并且通过罗果夫斯基线圈对冲击电流进行了测试。理论计算和实验结果表明，这种方法可以得到较高的测量电流。此外，实验装置采用干电池供电，体积小，适合于井下有限空间中的测试，因此具有一定的理论价值和实用性。

Testing method and experimental study of large impact current

In resistivity logging and formation testing,in order to improve exploration deepness to medium,we hope to adopt large measuring current by anypossibility.However,producing large current not only increases technique difficulty of power supply,but also makes system volume, power consumption and cost of the system incresed.The paper puts forward to a producing impact large current method using low energy power supply and measure impact current through introduced loop.Theoretical calculation and experimental resultindicate that the method can gain larger testing current. Moreover, it is fit for measuring in finite space under borehole because of the setting using dry battery to supply power and its volume small. So it has definite theory value and practicability.