Study On Deployment Of Technology Based On Acoustic Wave Water Injection Well

China’s oil fields are mostly heterogeneous multiple layers of sandstoneoilfields of continental and early summing oilfield development project on thebasis of both positive and negative aspects, in light of its own actual defined"early internal water, maintaining the reservoir pressure" approach todevelopment, oilfield water injection in China always adhere to thecharacteristics of oil technology. With oil-field development, has now entered aperiod of high water cut, effective tapping of remaining oil in low permeabilityoilfield production priorities used to condition also differs from the originalvertical wells and spoke well of inclined shaft, which led to regular and efficienttesting process cannot be deviated wells and well implemented on the wells,unable to meet production requirements. Therefore, the deployment technologyresearch based on acoustic wave water injection wells, deviated wells, branchwells and other special wells to provide technical support.Sectional this article taking into account the well water injection processbased on making use of the tubing as a channel of communication, through thestudy of acoustic signal transmission method. Firstly, to analyze the long cyclicaltubing wave propagation theory, determine the type of p-wave is the mostsuitable as a carrier wave, then equations of longitudinal wave propagation intube model as well as the frequency. According to the equations of the threedifferent sizes of tubing in the p-wave phase velocity and group velocitydispersion curve, model simulations, and tubing on the ground acoustictransmission experiment in time domain and frequency domain are analyzed,tubing wave propagation model proved to be correct and sound communicationlines. And then p-wave modulation analysis for tubing, spectacular and way ofusing frequency-shift keying modulation scheme of the system. Finally, the p-wave transmission experiment in a pilot wells, respectively, to signal and signal analysis, concluded that injection well rendered Sonic in the pass-bandalternating comb filter structure,300~500Hz,600~700Hz,900~1000Hz to pass,in the future, select the carrier frequency should be first choice within thisfrequency band.This paper provides the theoretical basis and experiment methods analysis toachieve the acoustic communication technology for injection wells flowdeployment.