有杆泵同井注采系统工况诊断方法研究
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摘要
与常规的单泵系统相比,有杆泵同井注采系统结构更加复杂,井下工况更加恶劣,现有技术不再适应其井下故障诊断的需要,严重影响了油田的产量和经济效益。鉴于此,根据现场实际工况,从Gibbs模型出发,提出了一种反推计算方法,建立并求解动载模型,进一步结合实测悬点示功图,绘制采出泵和注入泵示功图。现场18口井的应用中,对注入泵故障的判断结果与检泵结果符合度为91.3%,验证了计算模型的正确性。该诊断方法为有杆泵同井注采系统的现场应用提供了必要的理论指导。
Compared with the conventional single-pump system,the structure of the sucker rod pump injection-production system is more complicated and its downhole working conditions is harsher. The existing technology can no longer meet the need of downhole fault diagnosis,which seriously affects the oilfield output and economy benefit. In view of this,according to the actual working conditions in the field,based on the Gibbs model,a method of backstepping calculation is proposed. The dynamic load model is established and solved. Based on the measured polished rod diagram,the dynamometers of the production pump and injection pump are also drawn. In the field application in 18 wells,the coincidence of the judgment results of injection pump failure with the results of pump inspection was 91. 3%,which verified the correctness of the calculation model. The diagnostic method provides the necessary theoretical guidance for the field application of the sucker rod pump injection-production system.
Compared with the conventional single-pump system,the structure of the sucker rod pump injection-production system is more complicated and its downhole working conditions is harsher. The existing technology can no longer meet the need of downhole fault diagnosis,which seriously affects the oilfield output and economy benefit. In view of this,according to the actual working conditions in the field,based on the Gibbs model,a method of backstepping calculation is proposed. The dynamic load model is established and solved. Based on the measured polished rod diagram,the dynamometers of the production pump and injection pump are also drawn. In the field application in 18 wells,the coincidence of the judgment results of injection pump failure with the results of pump inspection was 91. 3%,which verified the correctness of the calculation model. The diagnostic method provides the necessary theoretical guidance for the field application of the sucker rod pump injection-production system.
引文
[1]王德民.强化采油方面的一些新进展[J].大庆石油学院学报,2010,34(5):19-26.WANG D M.New developments in improved oil recovery[J].Journal of Daqing Petroleum Institute,2010,34(5):19-26.
[2]曲占庆,张琪,李恒,等.井下油水分离系统设计及地面监测模型研究[J].西安石油大学学报(自然科学版),2006,21(3):34-37.QU Z Q,ZHANG Q,LI H,et al.Design of the downhole oil-water separation system for submersible electric pump wells and its ground monitoring model[J].Journal of Xi’an Shiyou University(Natural Science Edition),2006,21(3):34-37.
[3]冯娜娜.抽油机井泵况智能诊断方法研究[D].秦皇岛:燕山大学,2002.FENG N N.Study on the method of intelligent technologies for fault diagnostic of rod pumped wells[D].Qinhuangdao:Yanshan University,2002.
[4]蔡道钢.有杆泵故障智能诊断方法[D].成都:西南石油大学,2006.CAI D G.Method of intelligent technologies for fault diagnostic of rod pump[D].Chengdu:Southwest Petroleum University,2006.
[5]徐冰,李威,黄雪锋,等.基于Gibbs模型的有杆抽油系统泵功图的研究[J].数学的实践与认识,2013,43(15):20-27.XU B,LI W,HUANG X F,et al.The research on pump dynamograph of sucker-rod pumping system based on Gibbs model[J].Mathematics in Practice and Theory,2013,43(15):20-27.
[6]蔡东升,王金东,范纪国.有杆抽油系统预测模型的隐式差分法[J].石油机械,2002,30(2):40-42.CAI D S,WANG J D,FAN J G.An implicit differneial method for the wave equation of fod pumping system[J].China Petroleum Machinery,2002,30(2):40-42.
[7]GIBBS S G,NEELY A B.Computer diagnosis of downhole condition in sucker rod pumping wells[J].Journal of Petroleum Technology,1966(1):91-98.
[8]崔振华,余国安.有杆抽油系统[M].北京:石油工业出版社,1994.CUI Z H,YU G A.Rod pumping system[M].Beijing:Petroleum Industry Press,1994.
[9]王金东,陈浩然,杜永军.分层有杆抽油系统诊断模型的反问题计算法[J].应用力学学报,2002,19(2):102-103.WANG J D,CHEN H R,DU Y J.A reverse problem algorithm for the diagnostic model of sucker-rod pumping system of double-layer separate recovery[J].Chinese Journal of Applied Mechanics,2002,19(2):102-103.
[2]曲占庆,张琪,李恒,等.井下油水分离系统设计及地面监测模型研究[J].西安石油大学学报(自然科学版),2006,21(3):34-37.QU Z Q,ZHANG Q,LI H,et al.Design of the downhole oil-water separation system for submersible electric pump wells and its ground monitoring model[J].Journal of Xi’an Shiyou University(Natural Science Edition),2006,21(3):34-37.
[3]冯娜娜.抽油机井泵况智能诊断方法研究[D].秦皇岛:燕山大学,2002.FENG N N.Study on the method of intelligent technologies for fault diagnostic of rod pumped wells[D].Qinhuangdao:Yanshan University,2002.
[4]蔡道钢.有杆泵故障智能诊断方法[D].成都:西南石油大学,2006.CAI D G.Method of intelligent technologies for fault diagnostic of rod pump[D].Chengdu:Southwest Petroleum University,2006.
[5]徐冰,李威,黄雪锋,等.基于Gibbs模型的有杆抽油系统泵功图的研究[J].数学的实践与认识,2013,43(15):20-27.XU B,LI W,HUANG X F,et al.The research on pump dynamograph of sucker-rod pumping system based on Gibbs model[J].Mathematics in Practice and Theory,2013,43(15):20-27.
[6]蔡东升,王金东,范纪国.有杆抽油系统预测模型的隐式差分法[J].石油机械,2002,30(2):40-42.CAI D S,WANG J D,FAN J G.An implicit differneial method for the wave equation of fod pumping system[J].China Petroleum Machinery,2002,30(2):40-42.
[7]GIBBS S G,NEELY A B.Computer diagnosis of downhole condition in sucker rod pumping wells[J].Journal of Petroleum Technology,1966(1):91-98.
[8]崔振华,余国安.有杆抽油系统[M].北京:石油工业出版社,1994.CUI Z H,YU G A.Rod pumping system[M].Beijing:Petroleum Industry Press,1994.
[9]王金东,陈浩然,杜永军.分层有杆抽油系统诊断模型的反问题计算法[J].应用力学学报,2002,19(2):102-103.WANG J D,CHEN H R,DU Y J.A reverse problem algorithm for the diagnostic model of sucker-rod pumping system of double-layer separate recovery[J].Chinese Journal of Applied Mechanics,2002,19(2):102-103.