关键词: 声波通讯, 信号相关, 相关系数, 动态模型匹配

Abstract:

In the oil recovery operation, the accuracy and real?time of obtaining downhole reservoir parameters are very important for the formulation of the oil recovery process. Wireless acoustic communication technology with tubing string as channel can meet the requirements of real?time and transmission rate of downhole reservoir parameters in the oil recovery process, and has become a research hotspot in the field of oil well communication in recent years. Aiming at the difficulty of recognition caused by noise interference and waveform distortion in the wireless acoustic wave communication of oil wells, an effective recognition method：Acoustic dynamic model matching method was proposed in this paper. The method is based on the acoustic model of the tubing string and the principle of signal correlation. The correlation coefficient characteristics of the acoustic signal to be identified and the dynamic model are extracted by correlation processing, and the meaning of each acoustic signal is identified according to the correlation coefficient to improve the accuracy of recognition.

Key words: Acoustic communication, Signal correlation, Correlation coefficient, Dynamic model matching