石油学报 ›› 2005, Vol. 26 ›› Issue (1): 113-116,120.DOI: 10.7623/syxb200501024

• 石油工程 • 上一篇    下一篇

抽油机系统效率测试的不确定度分析模型及应用

关晓晶1, 王志国2,4, 王忠东3   

  1. 1. 大庆石油学院 黑龙江大庆 163318;
    2. 大庆石油学院秦皇岛分院 河北秦皇岛 066004;
    3. 燕山大学电气工程学院 河北秦皇岛 066004;
    4. 天津大学热能研究所 天津 30072
  • 收稿日期:2004-04-12 修回日期:2004-06-09 出版日期:2005-01-25 发布日期:2010-05-21
  • 作者简介:关晓晶,女,1960年10月生,1995年获燕山大学硕士学位,现为大庆石油学院高级工程师.E-mail:gxi-2004-2004@163.com
  • 基金资助:
    中国石油天然气集团公司"九五"科技攻关项目(970606)中部分成果,后续研究工作得到国家重点基础研究发展规划(973)项目(G2000026307)资助.

Application of mathematical model for uncertainty analysis of efficiency evaluation for pumping system

GUAN Xiao-jing1, WANG Zhi-guo2,4, WANG Zhong-dong3   

  1. 1. Daqing Petroleum Institute, Daqing 163318, China;
    2. Qinhuangdao Branch of Daqing Petroleum Institute, Qinhuangdao 066004, China;
    3. Faculty of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China;
    4. Thermal Energy Research Institute of Tianjin Universtiy, Tianjin 300072, China
  • Received:2004-04-12 Revised:2004-06-09 Online:2005-01-25 Published:2010-05-21

摘要: 系统效率是抽油机装置的主要评价指标,测量参数的质量对系统效率测算结果准确程度的影响很大.根据不确定度分析原理,建立了不确定分析数学模型,介绍了对不确定度分量进行A类或B类评定的方法以及合成标准不确定度和扩展不确定度的计算方法等.在此基础上,给出了抽油机装置单井系统效率的不确定度分析模型及评定实例.计算结果表明和影响抽油机装置单井系统效率测试结果的不确定度影响因素主要有电能表读数(圈数及所用时间)、油管压力、套管压力、油井产液量、油井液体密度和油井动液面等.在降低测试结果的不确定度时,应考虑降低这些参数的不确定度.

关键词: 抽油机系统, 不确定度, 测试方法, 数学模型, 灵敏系数

Abstract: The system efficiency is a primary index for evaluating pumping system. The quality of measured parameters has a great influence on the efficiency of pumping system. According to the analysis compendium of uncertainty, the uncertainty analysis models were established. The assessment method of uncertainty components in class A and class B was introduced. A combined calculation method of normal uncertainty and extended uncertainty was presented. An artificial lifted well system was taken as an example to illustrate the proposed method. The calculated results reveal that the impact factors for the uncertainty of the measured values include numerical reading of electric energy meter, tubing pressure, casing pressure, liquid production, liquid density and producing fluid level of artificial lifted well system. It is important to lower the uncertainty of these factors in order to decrease the uncertainty of measured result.

Key words: pumping system, uncertainty, measuring method, mathematical model, sensitivity coefficient

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