The Study and Design of Cased Hole Data Acquisition System

摘要

Current electromagnetic systems have been developed rapidly, however their results could be better convinced if they increase their precision. Besides, they also have big size, large power consumption, and so on. So the study of time domain electromagnetic data acquisition unit is proposed, one of the main challenges in cased hole data acquisition of this method and structures is to get the obvious and true downhole data. This paper focus on analyzing the idea of basic principle, describing the control strategy, designing principle and method. Then main to introduce the hardware and software, give a detailed control block diagram. Some algorithms are used to improve the SNR. Finally, in order to detect the effect, the experiments and simulation based on FFT were done and the measured signals were analyzed and processed, the results show the efficiency and feasibility of the system.