基于声波注水井调配工艺技术研究

发布时间：2018-04-24 06:06

本文选题：注水井声波通信 + 通带　；参考：《哈尔滨理工大学》2015年硕士论文

【摘要】：我国油田大部分属陆相沉积非均质多油层砂岩油田，开发初期在总结国内外油田采油工程正反两个方面的基础上，结合自身实际确定了“早期内部注水、保持油层压力”的开发方针，油田注水是中国石油始终坚持的特色技术。随着油田开发，现已进入高含水期，有效挖潜中低渗透层的剩余油成为油田生产的首要任务，而动用井况也由原有的直井变成斜井和分支井，这就导致常规的高效测调工艺无法在大斜度井和分支井井况上实施，无法满足分注的生产要求。因此，本文开展基于声波注水井调配工艺技术研究工作，为大斜度井、分支井等特殊井况提供技术保障。本文在充分考虑油井分段注水工艺的基础上，提出了一种利用油管作为通信信道，通过声波实现信号传输的研究方法。首先，通过对长距离周期性油管中声波的传输理论进行分析，确定纵波是最适合作为载波的声波类型，然后建立纵波在油管中的传播模型以及频率方程。根据方程对三种不同尺寸油管中的纵波相速度、群速度和色散曲线求解，，对模型进行仿真实验以及地面油管声波传输实验在时域和频域上进行综合对比分析，证明了油管声波传输模型的正确性和声波通信的可能行。然后对油管中纵波进行调制策略分析，懫用频移键控的方式作为系统的信号调制方案。最后，在先导井中进行纵波的传输实验，分别对冲击信号以及激励信号进行分析，得出注水井中声波呈现了通阻带交替的梳状滤波器结构，在300~500Hz、600~700Hz、900~1000Hz为通带，在将来选择载波频率时应首先在此频率段内进行选择。本文的研究工作为注水井流量调配控制工程中实现油管中声波远程通信，提供了理论分析基础及实验方法。
[Abstract]:Most of the oilfields in China belong to continental sedimentary heterogeneous multi-reservoir sandstone oilfields. In the early stage of development, on the basis of summing up the positive and negative aspects of oil recovery projects at home and abroad, the early internal water injection is determined in combination with the actual situation. The development policy of maintaining reservoir pressure, oilfield water injection is the characteristic technology of PetroChina. With the development of the oil field, it has now entered the high water cut period. The effective tapping of the remaining oil in the low and medium permeability zones has become the primary task of the oilfield production, and the production well condition has also changed from the original vertical well to the inclined well and the branching well. As a result, the conventional high efficiency logging and adjusting process can not be implemented in high deviated and branched well conditions, and can not meet the production requirements of separate injection. Therefore, this paper carries out the research on the technology of mixing water injection wells based on acoustic waves, which provides technical support for special well conditions such as large deviated wells and branch wells. On the basis of fully considering the technology of oil well subsection injection, this paper puts forward a research method of using tubing as communication channel and realizing signal transmission by sound wave. Firstly, by analyzing the theory of acoustic wave transmission in long distance periodic tubing, it is determined that the P-wave is the most suitable type of acoustic wave as carrier, and then the propagation model and frequency equation of P-wave in tubing are established. According to the equation, the longitudinal wave velocity, group velocity and dispersion curve of three kinds of tubing with different sizes are solved, and the simulation experiment of the model and the acoustic wave transmission experiment of the surface tubing in time domain and frequency domain are compared and analyzed. The correctness of the acoustic transmission model of tubing and the possibility of acoustic communication are proved. Then the modulation strategy of the longitudinal wave in the tubing is analyzed and the frequency shift keying is used as the signal modulation scheme of the system. Finally, the longitudinal wave transmission experiment is carried out in the pilot well, and the shock signal and the excitation signal are analyzed respectively. It is concluded that the acoustic wave in the injection well presents a comb-like filter structure with alternate pass-stopband, and the pass band is 600,700 Hz / 100Hz at 300 ~ 500Hz / 500Hz / 100Hz. In the future, the carrier frequency should be selected in this frequency band. The research work in this paper provides a theoretical analysis basis and experimental method for the realization of acoustic remote communication in oil tubing in water injection well flow allocation and control engineering.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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