本文選題：注水井聲波通信 + 通帶��； 參考：《哈爾濱理工大學(xué)》2015年碩士論文

【摘要】：我國油田大部分屬陸相沉積非均質(zhì)多油層砂巖油田，開發(fā)初期在總結(jié)國內(nèi)外油田采油工程正反兩個方面的基礎(chǔ)上，結(jié)合自身實際確定了“早期內(nèi)部注水、保持油層壓力”的開發(fā)方針，油田注水是中國石油始終堅持的特色技術(shù)。隨著油田開發(fā)，現(xiàn)已進(jìn)入高含水期，有效挖潛中低滲透層的剩余油成為油田生產(chǎn)的首要任務(wù)，而動用井況也由原有的直井變成斜井和分支井，這就導(dǎo)致常規(guī)的高效測調(diào)工藝無法在大斜度井和分支井井況上實施，無法滿足分注的生產(chǎn)要求。因此，本文開展基于聲波注水井調(diào)配工藝技術(shù)研究工作，為大斜度井、分支井等特殊井況提供技術(shù)保障。 本文在充分考慮油井分段注水工藝的基礎(chǔ)上，提出了一種利用油管作為通信信道，通過聲波實現(xiàn)信號傳輸?shù)难芯糠椒�。首先，通過對長距離周期性油管中聲波的傳輸理論進(jìn)行分析，確定縱波是最適合作為載波的聲波類型，然后建立縱波在油管中的傳播模型以及頻率方程。根據(jù)方程對三種不同尺寸油管中的縱波相速度、群速度和色散曲線求解，，對模型進(jìn)行仿真實驗以及地面油管聲波傳輸實驗在時域和頻域上進(jìn)行綜合對比分析，證明了油管聲波傳輸模型的正確性和聲波通信的可能行。然后對油管中縱波進(jìn)行調(diào)制策略分析，懫用頻移鍵控的方式作為系統(tǒng)的信號調(diào)制方案。最后，在先導(dǎo)井中進(jìn)行縱波的傳輸實驗，分別對沖擊信號以及激勵信號進(jìn)行分析，得出注水井中聲波呈現(xiàn)了通阻帶交替的梳狀濾波器結(jié)構(gòu)，在300~500Hz、600~700Hz、900~1000Hz為通帶，在將來選擇載波頻率時應(yīng)首先在此頻率段內(nèi)進(jìn)行選擇。 本文的研究工作為注水井流量調(diào)配控制工程中實現(xiàn)油管中聲波遠(yuǎn)程通信，提供了理論分析基礎(chǔ)及實驗方法。
[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.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.6

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