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S. A. Imamaliev - One of the best experts on this subject based on the ideXlab platform.

  • Mathematical Simulation of Unsteady-State Gas-Liquid Mixture Flow in a Bed-Well System
    Journal of Engineering Physics, 2016
    Co-Authors: É. M. Abbasov, S. A. Imamaliev
    Abstract:

    Based on theoretical investigations, the influence of various forms of Pressure variation at the wellhead with a nonstationary flow of a two-phase fluid in a bed–well system on the character of change in the Bottom-Hole Pressure has been investigated, which makes it possible to determine this Pressure from the wellhead operation parameters. The trapezoidal form of the change in Pressure is considered as an example. The coupled equations of filtration and the equations describing nonstationary motion of a gas–liquid mixture in a pipeline have been solved jointly. Analytical formulas have been obtained allowing one to determine the Bottom-Hole Pressure from the technological parameters at the wellhead with account for the dynamic connection of the bed–well system at different forms of change in the wellhead Pressure. The influence of the wellhead Pressure pulsation frequencies on the Bottom-Hole Pressure dynamics has been established.

  • Mathematical Simulation of Unsteady-State Gas–Liquid Mixture Flow in a Bed–Well System
    Journal of Engineering Physics and Thermophysics, 2016
    Co-Authors: É. M. Abbasov, S. A. Imamaliev
    Abstract:

    Based on theoretical investigations, the influence of various forms of Pressure variation at the wellhead with a nonstationary flow of a two-phase fluid in a bed–well system on the character of change in the Bottom-Hole Pressure has been investigated, which makes it possible to determine this Pressure from the wellhead operation parameters. The trapezoidal form of the change in Pressure is considered as an example. The coupled equations of filtration and the equations describing nonstationary motion of a gas–liquid mixture in a pipeline have been solved jointly. Analytical formulas have been obtained allowing one to determine the Bottom-Hole Pressure from the technological parameters at the wellhead with account for the dynamic connection of the bed–well system at different forms of change in the wellhead Pressure. The influence of the wellhead Pressure pulsation frequencies on the Bottom-Hole Pressure dynamics has been established.

  • Mathematical Simulation of Two-Phase Liquid Motion in Concentrically Disposed Communicating Pipes
    Journal of Engineering Physics and Thermophysics, 2014
    Co-Authors: É. M. Abbasov, S. A. Imamaliev
    Abstract:

    The influence of various kinds of elastic waves produced at the well mouth on the character of change in the Bottom-Hole Pressure is studied theoretically with account for the two-phase character of the liquid. The dependence of the Bottom-Hole Pressure dynamics on the phase concentration of sand has been determined.

É. M. Abbasov - One of the best experts on this subject based on the ideXlab platform.

  • Mathematical Simulation of Unsteady-State Gas-Liquid Mixture Flow in a Bed-Well System
    Journal of Engineering Physics, 2016
    Co-Authors: É. M. Abbasov, S. A. Imamaliev
    Abstract:

    Based on theoretical investigations, the influence of various forms of Pressure variation at the wellhead with a nonstationary flow of a two-phase fluid in a bed–well system on the character of change in the Bottom-Hole Pressure has been investigated, which makes it possible to determine this Pressure from the wellhead operation parameters. The trapezoidal form of the change in Pressure is considered as an example. The coupled equations of filtration and the equations describing nonstationary motion of a gas–liquid mixture in a pipeline have been solved jointly. Analytical formulas have been obtained allowing one to determine the Bottom-Hole Pressure from the technological parameters at the wellhead with account for the dynamic connection of the bed–well system at different forms of change in the wellhead Pressure. The influence of the wellhead Pressure pulsation frequencies on the Bottom-Hole Pressure dynamics has been established.

  • Mathematical Simulation of Unsteady-State Gas–Liquid Mixture Flow in a Bed–Well System
    Journal of Engineering Physics and Thermophysics, 2016
    Co-Authors: É. M. Abbasov, S. A. Imamaliev
    Abstract:

    Based on theoretical investigations, the influence of various forms of Pressure variation at the wellhead with a nonstationary flow of a two-phase fluid in a bed–well system on the character of change in the Bottom-Hole Pressure has been investigated, which makes it possible to determine this Pressure from the wellhead operation parameters. The trapezoidal form of the change in Pressure is considered as an example. The coupled equations of filtration and the equations describing nonstationary motion of a gas–liquid mixture in a pipeline have been solved jointly. Analytical formulas have been obtained allowing one to determine the Bottom-Hole Pressure from the technological parameters at the wellhead with account for the dynamic connection of the bed–well system at different forms of change in the wellhead Pressure. The influence of the wellhead Pressure pulsation frequencies on the Bottom-Hole Pressure dynamics has been established.

  • Mathematical Simulation of Two-Phase Liquid Motion in Concentrically Disposed Communicating Pipes
    Journal of Engineering Physics and Thermophysics, 2014
    Co-Authors: É. M. Abbasov, S. A. Imamaliev
    Abstract:

    The influence of various kinds of elastic waves produced at the well mouth on the character of change in the Bottom-Hole Pressure is studied theoretically with account for the two-phase character of the liquid. The dependence of the Bottom-Hole Pressure dynamics on the phase concentration of sand has been determined.

  • Influence of Vibrowave Action on the Character of Pressure Distribution in the Formation with Allowance for the Dynamic Coupling of the System “Formation–Well”
    Journal of Engineering Physics and Thermophysics, 2014
    Co-Authors: É. M. Abbasov, N. A. Agaeva
    Abstract:

    The influence of elastic waves in the wellhead on the character of change in the Bottom-Hole Pressure has been studied based on theoretical investigations. An analytical expression for the Bottom-Hole Pressure has been obtained with allowance for the dynamic coupling of the system “formation–well.”

  • Hydrodynamics of the Fluid Filtrate on Drilling-In
    Journal of Engineering Physics and Thermophysics, 2014
    Co-Authors: É. M. Abbasov, N. A. Agaeva
    Abstract:

    The volume of the liquid penetrating into the formation after drilling-in has been determined on the basis of theoretical investigations. The dynamics of change in the Bottom-Hole Pressure has been determined in this process. It has been shown that because of the water hammer, the Bottom-Hole Pressure can be doubled in the presence of large fractures and pores closer to the well-Bottom zone.

Xiaochun Li - One of the best experts on this subject based on the ideXlab platform.

  • a unified formula for determination of wellhead Pressure and Bottom Hole Pressure
    Energy Procedia, 2013
    Co-Authors: Xiaochun Li
    Abstract:

    Abstract The number of gas injection or exploitation projects is on fast increase with growing energy needs and environmental problems. Of these projects, the calculation and the control of wellhead Pressure or Bottom-Hole Pressure in wellbores are usually key steps. However, methods used to predict wellhead and Bottom-Hole Pressure are multifarious, making the program writing and practical application inconvenient. In this study, a unified formula derived from the differential equations of one-dimensional steady pipe flow and applicable in both injection wells and production wells was presented for calculation of both wellhead Pressure and Bottom-Hole Pressure. The recalculation with a traditional numerical method of the same equations corroborated well the accuracy of the unified formula, and the positive- reverse checking calculation verified its reliability. Basic data from Shenhua CCS project were used for studying the influence of injected gas temperature, geothermal gradient and flow rate on wellbore Pressure by applying the unified formula. The results can provide a technical guidance for practical operation.

Ubirajara F Moreno - One of the best experts on this subject based on the ideXlab platform.

  • Sucker-Rod Pumping System Fault Detection and Isolation Method Using Bottom Hole Pressure Measurement
    IFAC Proceedings Volumes, 2016
    Co-Authors: Andrés Codas, Bernardo Ordonez, Ubirajara F Moreno
    Abstract:

    Abstract In this paper a framework proposal is presented for fault detection and isolation based on principal component analysis for sucker-rod pumping systems using Bottom Hole Pressure and others measurements. The proposed algorithm uses signals frequency attributes to generate faults signatures. Hotelling's T 2 index and the square prediction error are used to compare process online samples with signatures generated offline. The results were obtained using a sucker-rod pump simulated model.

  • CCA/ISIC - Improving the operational conditions for the sucker-rod pumping system
    2009 IEEE International Conference on Control Applications, 2009
    Co-Authors: Bernardo Ordonez, Andres Codas, Ubirajara F Moreno
    Abstract:

    In this work a new perspective of a sucker-rod pumping system control is presented. The strategy consists in associating the Bottom Hole Pressure measurement and dynamometer cards analysis in a cascaded control. In the proposal, the widely applied control strategies based on dynamometer cards are combined with the strategy based on the measurement of the Bottom Hole Pressure, since the development of low cost downHole sensors turned possible the measurement of downHole variables. The simulation results are analyzed in order to evaluate the operational conditions propitiated by the sucker-rod pumping cascaded control, in a hardware in the loop platform.

  • sucker rod pumping system simulator and dynamic level control using Bottom Hole Pressure
    Emerging Technologies and Factory Automation, 2008
    Co-Authors: Bernardo Ordonez, Andres Codas, Ubirajara F Moreno, A Teixeira
    Abstract:

    In this work a new perspective of the control of a sucker-rod pumping system is presented. In despite of the widely application of control strategies based on dynamometer cards recognition they present several limitations in the control and maintenance aspects. Nowadays, with the development of a new class of low cost downHole sensors, new control strategies could bee applied. In this work, a control framework using the Bottom Hole Pressure combined with a variable speed drive (VSD) structure is proposed. A hardware in the loop simulation platform was developed to evaluate the measure of the Bottom Hole Pressure contribution in a sucker-rod pumping control system.

  • ETFA - Sucker-rod pumping system: Simulator and dynamic level control using Bottom Hole Pressure
    2008 IEEE International Conference on Emerging Technologies and Factory Automation, 2008
    Co-Authors: Bernardo Ordonez, Andres Codas, Ubirajara F Moreno, A Teixeira
    Abstract:

    In this work a new perspective of the control of a sucker-rod pumping system is presented. In despite of the widely application of control strategies based on dynamometer cards recognition they present several limitations in the control and maintenance aspects. Nowadays, with the development of a new class of low cost downHole sensors, new control strategies could bee applied. In this work, a control framework using the Bottom Hole Pressure combined with a variable speed drive (VSD) structure is proposed. A hardware in the loop simulation platform was developed to evaluate the measure of the Bottom Hole Pressure contribution in a sucker-rod pumping control system.

Sun Qiji - One of the best experts on this subject based on the ideXlab platform.

  • Horizontal Well Bottom-Hole Pressure Drop Steam Flooding Numerical Calculation
    Advances in Petroleum Exploration and Development, 2014
    Co-Authors: Sun Qiji
    Abstract:

    In the steam flooding process, when steam injection rate is high, wellhead and Bottom Hole string Pressure substantially increased, oil displacement effect is affected. The numerical simulation method was used to study the process of horizontal steam flooding steam injection rate, steam hold on horizontal liquid rate and the number of Holes, pore size to wellhead and Bottom-Hole Pressure and the influence of tubing string. The calculation results show that: the steam injection amount was larger, the more Pressure on the Bottom of the well and string; the pipe diameter Holes on the quantity increased, and the Bottom of the well and the smaller string Pressure. Injecting steam with more liquid rate the higher Pressure were on the Bottom of the well and string. Only properly reduce steam injection rate and the liquid rate, Holes quantity and Holes were reduced .the inner diameter tubing stress and Bottom Holes dramatically risen could be effectively reduced. Key words: Horizontal well; Steam flooding; Numerical simulation; Pore size; Pressure drop