杆抽油井工况诊断方法及程序采油专业论文.doc

毕业设计（论文） 有杆抽油井工况诊断方法及程序 摘要：有杆泵采油是世界石油工业传统的采油方式之一，也是迄今在采油工程中一直占主导地位的人工举升方式。及时、准确地掌握有杆抽油系统的工作状况，诊断油井所存在的问题，制定合理的技术措施，使油井及时恢复正常生产，提高举升效率和油井产量，对提高油田开发的综合经济效益具有十分重要意义。 本文根据抽油机的几何结构，建立了抽油机悬点位移、速度、加速度等运动参数规律。在有杆泵抽油装置、泵的工作原理的基础上针对不同材质的组合抽油杆柱，对抽油杆微元体进行受力分析，并建立了描述抽油杆柱动力学特性的波动方程。从而建立诊断数学模型，以抽油机的悬点运动规律并结合悬点实测示功图作为诊断模型的边界条件，通过有限差分法对模型进行数值求解，利用VB语言编写程序计算出抽油杆柱的位移和载荷，绘出示功图。 根据新疆油田两口生产井资料，通过所编程序对油井进行实例计算，从实测悬点载荷、位移求解出抽油杆不同位置在任意时间段的位移和载荷，并绘出泵示功图。实现对抽油系统工况诊断，验证所编程序。 关键词：有杆抽油；示功图；诊断；波动方程；有限差分 ABSTRACT Rod pump?oil recovery?of?oil production?in?the?world oil industry, and so far?in?the?production engineering?has been?dominated by artificial lift.?Timely?and accurate grasp of?rod?pumping system working conditions,?the?diagnosis?of?well?exist,?and?to develop a reasonable?technical measures?so?that?the?wells?in a timely manner?to?return to normal?production, improve?lifting?efficiency and?oil production,?to improve?the?comprehensive economic benefits?of?the?oil field development?has?very important significance. Based on?the geometry?of?the?pumping unit, the establishment of a?law?of?motion parameters?of?the?pumping unit?polished rod displacement, velocity, acceleration,?etc..?Rod pumping equipment,?pump works?on the basis of?a combination?of?different materials?of sucker rod,?sucker rod?element?stress analysis?and description of?the?sucker rod string?dynamic properties of volatility?equation.?In order to establish?the?diagnosis of?the mathematical model,?to?the?law of motion?of?the?pumping?of the suspension point?and?the?suspension point?measured?to?show?the diagram?as a diagnostic?model?boundary conditions,?numerical solution of?the model?using the finite difference?method,?using VB language?to write programs?to calculate the?sucker rod displacement?and load?of?the?column,?painted?to produce?a diagram. Two?production　wells?data?according?to?the?Xinjiang Oilfield,?the programmed?well?examples?from?the?measured?polished rod load, displacement?solving?the?displacement?and?load?of?the?