Injection Wells Deployment Process Development Based On Sound Waves Directed

Water injection at the present stage is the lifeline of oilfield development, and also is the key to achieve sustainable and stable development of oil field. It is well known that directional well has obvious advantages in production and cost compared to conventional water injection well. This paper is an exploratory research work carried out under the background of segmented water injection in oil field. According to the communication characteristics of well bore control technology, a method is put forward to realize the signal transmission between the ground and underground equipment by using the tubing as a communication channel. The method effectively solves the directional well, the high angle, the branch well and so on,there exist problems such as conventional instruments can not be deployed.First, the design of the injection wells targeting the deployment process overall program. STC12C5A60S2 based microcontroller development of downhole data acquisition and processing subsystem and control subsystem, by controlling the motor to achieve valve opening is adjusted to complete the injection wells each interval automatic deployment.Secondly, based on long distance, cycle oil pipe acoustic wave transmission theory analysis, the establishment of a mathematical model of one-dimensional tubing of longitudinal wave propagation, the model of simulation oil pipe acoustic transmission dispersion curve and amplitude variation and frequency distribution curve are obtained by.Again, this paper according to the pipe sound transmission characteristics proposed a using orthogonal frequency division multiplexing(OFDM) acoustic modulation and demodulation method is given based on the technology of oil pipe acoustic communication system structure diagram, and the simulation experiments to verify the possibility of OFDM tubing of communication technology.Finally, in Jilin Songyuan field experiments carried out a pilot test well, first of all, experimental platform, different frequencies or data acquisition frequency band, white noise plotted curves, time domain characteristic curve, the impact of the frequency characteristic signal, sine signal frequency characteristic curve characteristic curve and deployment data, by analyzing the distribution curve, measured injection wells to obtain sound waves through the tubing stop-band range, and transmits the code and return code is the data consistency verification deployment, the final, verified by experiments acoustic signal adjusting downhole valve controlling water injection is feasible.The research work in this paper provides a theoretical basis and experimental method for the realization of acoustic remote communication in the tubing.