復(fù)雜流體介質(zhì)條件下井筒壓力波傳播規(guī)律研究
發(fā)布時間：2018-12-18 16:51
【摘要】：汕氣鉆井中涉及井筒壓力波傳播的工程問題廣泛存在,研究不同流體介質(zhì)條件下井筒壓力波的傳播規(guī)律有助于解決困擾大規(guī)模低品位油氣資源和深層油氣資源開發(fā)的氣體鉆井、充氣鉆井、泡沫鉆井、高密度鉆井液鉆井的泥漿脈沖隨鉆測量難題和氣體鉆井、高壓深井鉆井的井筒壓力控制難題。為此,本文系統(tǒng)研究了復(fù)雜流體介質(zhì)條件下井筒壓力波的傳播規(guī)律,具體研究內(nèi)容及取得的主要成果如下：(1)建立了氣相流體介質(zhì)條件下井筒壓力波傳播速度和衰減系數(shù)的解析計算模型,并開展了水平管氣相介質(zhì)壓力波傳播實驗,模型計算結(jié)果與實驗數(shù)據(jù)吻合較好。在此基礎(chǔ)上,系統(tǒng)研究了角頻率、系統(tǒng)壓力、溫度和氣體流速對井筒壓力波傳播和衰減的影響。(2)在考慮液相密度動態(tài)變化、壁而剪切力和黏性耗散的基礎(chǔ)上,建立了液相流體介質(zhì)條件下井筒壓力波波速和衰減系數(shù)的理論計算模型,并開展了水平管液相流體介質(zhì)壓力波傳播實驗,模型預(yù)測結(jié)果與實驗數(shù)據(jù)吻合較好,并進(jìn)一步研究了角頻率、液相密度、體積彈性模量、黏度及流速等參數(shù)對壓力波傳播速度和衰減系數(shù)的影響。(3)基于氣液兩流體模型,建立并求解了井筒氣液兩相流體介質(zhì)中壓力波傳播和衰減的數(shù)學(xué)模型,并開展了泡沫氣液兩相流體水平管壓力波傳播實驗,利用泡沫流體實驗數(shù)據(jù)和氣液兩相流體壓力波傳播經(jīng)典實驗數(shù)據(jù)完成了對理論模型的驗證。在此基礎(chǔ)上,系統(tǒng)研究了角頻率、持氣率、系統(tǒng)壓力、溫度等參數(shù)對壓力波傳播和衰減的影響。(4)基于液固兩流體模型,建立了井筒液固兩相流體中壓力波傳播和衰減的數(shù)學(xué)模型,并利用經(jīng)典的懸濁液超聲波傳播實驗數(shù)據(jù)對理論模型進(jìn)行了驗證,并深入分析了角頻率、固相含量、顆粒尺寸、固相相密度及兩相流體黏度等參數(shù)對壓力波傳播和衰減系數(shù)的影響。(5)針對充氣鉆井的泥漿脈沖隨鉆測量難題,借助井筒氣液兩相流體條件下壓力波傳播和衰減規(guī)律的研究成果,深入分析了造成泥漿脈沖隨鉆測量困難的內(nèi)在原因,提出了改善充氣鉆井泥漿脈沖隨鉆測量效果的復(fù)合改良工藝和技術(shù),現(xiàn)場試驗結(jié)果表明,提出的改良工藝和措施能夠有效解決充氣鉆井的泥漿脈沖隨鉆測量難題。(6)針對氣體鉆井的井筒壓力控制難題,建立了基于壓力波動理論的氣體鉆井鉆遇裂縫產(chǎn)氣早期檢測及預(yù)警技術(shù)�，F(xiàn)場試驗結(jié)果表明,該技術(shù)能夠在氣體鉆井鉆遇裂縫產(chǎn)氣不久即進(jìn)行有效檢測,比傳統(tǒng)方法發(fā)現(xiàn)地層產(chǎn)氣的時問早得多,有力拓展了氣體鉆井井筒壓力控制的時間窗口。本研究系統(tǒng)構(gòu)建了復(fù)雜流體介質(zhì)條件下井筒壓力波傳播的理論體系,為汕氣鉆井中涉及井筒壓力波傳播的工程問題的解決奠定了核心的理論基礎(chǔ),具有積極的現(xiàn)實意義。
[Abstract]:The engineering problems related to wellbore pressure wave propagation are widespread in Shantou gas drilling. Studying the propagation law of wellbore pressure wave under different fluid medium conditions is helpful to solve the problem of gas drilling, which puzzles the development of large-scale low-grade oil and gas resources and deep oil and gas resources. Gas drilling, foam drilling, high density drilling fluid drilling mud pulse while drilling measurement and gas drilling, high pressure drilling hole pressure control problems. Therefore, in this paper, the propagation law of wellbore pressure wave in complex fluid medium is studied systematically. The specific research contents and main achievements are as follows: (1) the analytical calculation model of pressure wave propagation velocity and attenuation coefficient of wellbore under the condition of gas-phase fluid medium is established, and the horizontal tube gas pressure wave propagation experiment is carried out. The results of the model are in good agreement with the experimental data. On this basis, the effects of angular frequency, system pressure, temperature and gas velocity on the propagation and attenuation of wellbore pressure wave are systematically studied. (2) considering the dynamic change of liquid density, wall shear force and viscosity dissipation, The theoretical calculation model of pressure wave velocity and attenuation coefficient of wellbore under liquid fluid medium condition is established, and the pressure wave propagation experiment in horizontal tube liquid fluid medium is carried out. The predicted results are in good agreement with the experimental data. The effects of angular frequency, liquid density, bulk modulus of elasticity, viscosity and flow rate on the propagation velocity and attenuation coefficient of the pressure wave are further studied. (3) based on the gas-liquid two-fluid model, The mathematical model of pressure wave propagation and attenuation in gas-liquid two-phase fluid medium in wellbore is established and solved, and the pressure wave propagation experiment in horizontal tube of foamed gas-liquid two-phase fluid is carried out. The theoretical model is verified by using the experimental data of foam fluid and the classical experimental data of pressure wave propagation of gas-liquid two-phase fluid. On this basis, the effects of angular frequency, gas holdup, pressure and temperature on the propagation and attenuation of pressure waves are systematically studied. (4) based on the liquid-solid two-fluid model, The mathematical model of pressure wave propagation and attenuation in liquid-solid two-phase fluid in wellbore is established, and the theoretical model is verified by the classical experimental data of ultrasonic propagation of suspensions. The angular frequency, solid content and particle size are analyzed in depth. The influence of solid phase density and viscosity of two-phase fluid on pressure wave propagation and attenuation coefficient. (5) to measure mud pulse while drilling in inflatable drilling. With the help of the research results of pressure wave propagation and attenuation under gas-liquid two-phase fluid condition in wellbore, the internal causes of the difficulty in measuring mud pulse while drilling are deeply analyzed. The compound improved technology and technology for improving the effect of pulse while drilling measurement of aerated drilling mud are put forward. The field test results show that, The proposed improved technology and measures can effectively solve the problem of mud pulse while drilling measurement in inflatable drilling. (6) aiming at the problem of wellbore pressure control in gas drilling, Based on the theory of pressure fluctuation, the early detection and early warning technology of gas production in gas drilling is established. The field test results show that the technology can effectively detect gas production in gas drilling, which is much earlier than the traditional method in discovering formation gas production, and it can expand the time window of gas drilling wellbore pressure control. In this paper, a theoretical system of wellbore pressure wave propagation in complex fluid medium is constructed, which lays a core theoretical foundation for solving the engineering problem of wellbore pressure wave propagation in Shantou gas drilling, and has positive practical significance.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TE241
本文編號：2386143
[Abstract]:The engineering problems related to wellbore pressure wave propagation are widespread in Shantou gas drilling. Studying the propagation law of wellbore pressure wave under different fluid medium conditions is helpful to solve the problem of gas drilling, which puzzles the development of large-scale low-grade oil and gas resources and deep oil and gas resources. Gas drilling, foam drilling, high density drilling fluid drilling mud pulse while drilling measurement and gas drilling, high pressure drilling hole pressure control problems. Therefore, in this paper, the propagation law of wellbore pressure wave in complex fluid medium is studied systematically. The specific research contents and main achievements are as follows: (1) the analytical calculation model of pressure wave propagation velocity and attenuation coefficient of wellbore under the condition of gas-phase fluid medium is established, and the horizontal tube gas pressure wave propagation experiment is carried out. The results of the model are in good agreement with the experimental data. On this basis, the effects of angular frequency, system pressure, temperature and gas velocity on the propagation and attenuation of wellbore pressure wave are systematically studied. (2) considering the dynamic change of liquid density, wall shear force and viscosity dissipation, The theoretical calculation model of pressure wave velocity and attenuation coefficient of wellbore under liquid fluid medium condition is established, and the pressure wave propagation experiment in horizontal tube liquid fluid medium is carried out. The predicted results are in good agreement with the experimental data. The effects of angular frequency, liquid density, bulk modulus of elasticity, viscosity and flow rate on the propagation velocity and attenuation coefficient of the pressure wave are further studied. (3) based on the gas-liquid two-fluid model, The mathematical model of pressure wave propagation and attenuation in gas-liquid two-phase fluid medium in wellbore is established and solved, and the pressure wave propagation experiment in horizontal tube of foamed gas-liquid two-phase fluid is carried out. The theoretical model is verified by using the experimental data of foam fluid and the classical experimental data of pressure wave propagation of gas-liquid two-phase fluid. On this basis, the effects of angular frequency, gas holdup, pressure and temperature on the propagation and attenuation of pressure waves are systematically studied. (4) based on the liquid-solid two-fluid model, The mathematical model of pressure wave propagation and attenuation in liquid-solid two-phase fluid in wellbore is established, and the theoretical model is verified by the classical experimental data of ultrasonic propagation of suspensions. The angular frequency, solid content and particle size are analyzed in depth. The influence of solid phase density and viscosity of two-phase fluid on pressure wave propagation and attenuation coefficient. (5) to measure mud pulse while drilling in inflatable drilling. With the help of the research results of pressure wave propagation and attenuation under gas-liquid two-phase fluid condition in wellbore, the internal causes of the difficulty in measuring mud pulse while drilling are deeply analyzed. The compound improved technology and technology for improving the effect of pulse while drilling measurement of aerated drilling mud are put forward. The field test results show that, The proposed improved technology and measures can effectively solve the problem of mud pulse while drilling measurement in inflatable drilling. (6) aiming at the problem of wellbore pressure control in gas drilling, Based on the theory of pressure fluctuation, the early detection and early warning technology of gas production in gas drilling is established. The field test results show that the technology can effectively detect gas production in gas drilling, which is much earlier than the traditional method in discovering formation gas production, and it can expand the time window of gas drilling wellbore pressure control. In this paper, a theoretical system of wellbore pressure wave propagation in complex fluid medium is constructed, which lays a core theoretical foundation for solving the engineering problem of wellbore pressure wave propagation in Shantou gas drilling, and has positive practical significance.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TE241
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