助力深抽有杆泵井工况诊断技术研究

发布时间：2018-04-18 03:32

本文选题：减载力 + 助力深抽　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：随着油田的进一步开发,油层埋藏深、能量低、渗透性差的油井越来越多,泵挂深度的加大,受抽油机的额定载荷、扭矩以及抽油杆强度等条件的制约,影响着大泵应用和油井产量的提高。减载器具有减载、深抽、节能等作用,在油田现场得到了越来越广泛的应用。有杆泵井抽油杆柱加装助力深抽装置后,抽油杆管柱的受力状况发生了变化,影响示功图形状和特征以及基于示功图的油井工况诊断精度。通过抽油杆柱的运动学和动力学分析以及Gibbs一维带阻尼波动方程的修正等研究,建立了助力深抽有杆泵井泵功图求解的数学模型;考虑油井正常工况、供液不足、气体影响、抽油杆断脱、上碰泵、下碰泵、柱塞卡泵、柱塞或游动阀磨损、固定阀磨损、工作筒磨损或裂开、双阀漏失等一种或多种工况类型(故障类型)的诊断,建立了基于矢量法和规则诊断法的泵功图工况特征综合识别模型,并编制了“助力深抽有杆泵井工况诊断软件”。应用Algor有限元数值模拟软件,建立了助力深抽有杆泵井抽油杆柱力学数值模拟模型,以“助力深抽有杆泵井工况诊断软件”计算的泵功图为边界条件,模拟计算相应地面功图,并与实际地面功图进行对比分析,结果表明,两者最大相对误差为5.7%,平均相对误差为1.7%,误差小于5%的点数占所有点数的99.2%,检验了所建立的助力深抽有杆泵井泵功图求解数学模型和研发软件的准确性。“助力深抽有杆泵井工况诊断软件”经9口油井的实际应用,工况诊断正确率为100%,表明助力深抽有杆泵井工况诊断模型和软件正确可行、应用可靠,能够为工程技术人员及时发现、分析、处理油井故障提供技术支持,实现油井高效稳定生产。
[Abstract]:With the further development of the oil field, more and more oil wells with deep reservoir, low energy, poor permeability, and increasing pump hanging depth are restricted by the rated load, torque and rod strength of the pumping unit.It affects the application of large pump and the improvement of oil well production.The load reducer has the functions of reducing load, deep pumping and saving energy, and has been applied more and more widely in oil field.After the sucker rod string of rod pump well is equipped with the auxiliary deep pumping device, the stress state of the sucker rod string has changed, which affects the shape and characteristics of the indicator diagram and the diagnostic accuracy of the oil well working condition based on the indicator diagram.Based on the kinematics and dynamics analysis of sucker rod string and the modification of Gibbs one-dimensional damped wave equation, a mathematical model is established to solve the power diagram of deep pumping rod pump, considering the normal condition of oil well, the shortage of liquid supply, the influence of gas, and so on.Diagnosis of one or more types of working conditions (fault type), such as sucker rod breakage, upper impact pump, lower impact pump, plunger card pump, wear of plunger or swimming valve, wear of fixed valve, wear or crack of working tube, leakage of double valve, etc.Based on vector method and rule diagnosis method, a comprehensive identification model of working condition characteristics of pump power diagram is established, and a software for working condition diagnosis of deep pumping rod pump well with auxiliary force is developed.The numerical simulation model of sucker rod string mechanics of deep pumping rod pumping well is established by using Algor finite element numerical simulation software. The corresponding surface work diagram is simulated and calculated under the boundary condition of the pump work diagram calculated by "working condition Diagnostic Software for Deep pumping Rod pumping well".And compared with the actual ground work diagram, the results show that,The maximum relative error is 5.7 and the average relative error is 1.7. The points with error less than 5% account for 99.2 points of all points. The accuracy of the mathematical model and R & D software is tested.Through the practical application of 9 wells, the correct rate of working condition diagnosis is 100, which indicates that the diagnostic model and software for the working condition of deep pumping rod pump are correct and feasible, and the application is reliable.It can provide technical support for engineers to find, analyze and deal with oil well faults in time, and realize high efficiency and stable production.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE355.5

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