通过金属套管测量地层电阻率的可行性研究

探讨了金属套管井中电阻率测量的可行性，在理论上探讨套管井电阻率的测量方法及测量原理，并详细地推导测量电阻率的计算公式，在实验上，主要研究怎样在强干扰信号下测出微弱的有用信号，设计出在白噪声淹没下的实际信号测量电路，包括电压测量电路，电流测量电路，参考信号放大电路等。最后建一模型井，并用设计的电极系及有关测量电路在模型井中进行地层电阻率测量的实验，验证该测量方法的可行性。

Feasibility Study on Formation Resistivity Measurement Through Metal Casing.

Electrical logging in cased hole is a subject of strong current interest. Methods and apparatus are presented for measuring formation resistivity through metal casing. The design of voltage and current measurement circuits, reference signal circuit, sonde of the tool and model well construction are also included. Formation resistivity measurement is made in the model well with the sonde and electronic cartridge designed. The aim is to verify the feasibility of the method and apparatus. At the end of this paper a scheme based on the result of the experiment is proposed to improve the measuring method, measuring circuit and sonde.