Research And Development Of Oil Field Well Test Apparatus

The measuring of the well depth and indecator diagram are the most regular techniques in well logging technology . And for the traditional instruments have several disadvantages such as narrow function, big volume and high price which couldn't meet the need of well logging, the target of this thesis work is mainly to describe the portable instrument with multi-function and high intelligence.In our system, the traditional instrument of well depth measuring and indecator diagram are combined into one, and the embed system with the core of 80C196 is designed. What's more, a small operation system with keyboard input and Liquid Crystal Display is designed for the system which has the function of signal adjusting, data collecting, keyboard controlling, data computing and serial port communication o In this thesis the research on signal filtering is nicely done both in hardware and in software.Reflected wave signal is processed by double channels two-order low-pass active filtering in hardware, and indicator diagram signal is processed by digital filtering in software.The research work in this thesis is described as follows:1 . Research on theory of well logging technology and measuring ways . According to the well logging requirement, the embed system with 80C196 and interface circuit are designed.2. A software system with strong function, convenient operation and concise interface is designed based on careful locale checking and the operation of well logging . 3 . The processing circuit based on the reflecting wave signal from well surfaceand indicator diagram signal is designed, which is focused on the circuitdesigning in two-order low pass active filtering circuit of reflected wavesignal. 4. According to the signal feature and the requirement of the graphdisplaying, the digital filtering arithmetic is designed .5. The testing result nicely proves the stability design in both software andhardware aspects.