掺稀抽油机井系统效率计算新方法与提高对策探讨  

New Computational Method and Discussion on Enhancing Countermeasures of the System Efficiency of Pumping Wells with Light Hydrocarbon Mixing

作　　者：姜建华[1] 唐照星 吾买尔江.艾力 刘洪光[1] Jiang Jianhua Tang Zhaoxing Wumai erjiang. Aili Liu Hongguang(No.2 Oil Production Plant,SIONPEC Northwest Oilfield Company,Luntai Xinjiang 841604)

机构地区：[1]中国石化西北油田分公司塔河采油二厂,新疆轮台841604

出　　处：《中外能源》2017年第2期41-46,共6页Sino-Global Energy

摘　　要：中国石化塔河采油二厂共有机采井530口,其中机抽井399口,占机采井总数的75.3%,但抽油机井整体系统效率平均仅为19.7%,平均吨液耗功达到14.1kW·h/t,且尚无系统的抽油机系统效率测试与计算方法,影响抽油机井系统效率的主要因素也不明确。在常规机抽井系统效率的计算方法基础上,考虑掺稀注入系统的影响以及掺稀井动液面确定这两个因素,研究出掺稀机抽井系统效率的计算方法,并指出影响系统效率的主要因素为动力驱动因素(抽油机电机)和杆柱因素(抽油杆柱),次要因素为注入系统因素(掺稀泵)和井下管柱因素(套管)。通过对38口掺稀井的系统效率计算,发现针对套压>0的油井,存在系统效率为负值的情况,对影响系统效率的因素进行分析后,将计算方法进行修正并验证其实用性。同时,提出使用节能电机、变频柜以及井下配套工具提高系统效率,现场试验结果表明,使用节能电机和变频柜,系统效率由18.1%提高到25.5%,使用井下配套工具,系统效率由17.4%提高到24.9%。Up to now,there are 530 suck-rod pumping wells in No.2 Oil Production Plant of Tahe oilfield.There are 399 pumping wells among them,accounted for 75.3%.But the average system efficiency of the suck-rod pumping wells is only 19.7%,and the average power consumption is 14.1kW·h/t,and there isn ＇ t testing and computational method of the pumping system efficiency and the influence factors of the system efficiency are not clear.Based on the common computational method of the pumping well system efficiency,the influence of the injection system of light hydrocarbon mixing and working fluid level determination of the light hydrocarbon mixing wells were considered.The method of calculating the system efficiency of the pump-ing wells with light hydrocarbon mixing was researched.It points out that the primary influencing factors of the system efficiency are power drive factors（pumping unit motor） and rod string factors（sucker rod string）,and secondary factors are injection system factors（light hydrocarbon mixing pump） and downhole string factors（casing）.The system efficiency of 38 pumping wells with light hydrocarbon mixing was calculated.The system efficiency is negative sometime when the casing pressure is greater than 0.After the influence factors of the system efficiency were analyzed,the computational method was corrected and its practicability was verified.At the same time,energy-saving motor,frequency conversion cabinet and matching tools of wells may be used for improving the system efficiency.Field experiment results show that the system efficiency increased from 18.1% to 25.5% after the energy-saving motor and frequency conversion cabinet were applied;and it increased from 17.4% to 24.9% after the matching tool of wells was applied.

关 键 词：抽油机井 系统效率 影响因素 对策 

分 类 号：TE933.1[石油与天然气工程—石油机械设备]