抽油机井电功图测试动液面技术研究与应用
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摘要
油井动液面数据反映了地层供液与能量状况,常规人工定期测试方法存在录取不及时、连续性、实时性差等问题。通过确定电功图量化指标,基于油井举升上行功与扬程成正比原理建立电功图计算动液面数学模型,采用上行功增量计算法实现了计算模型的求解,消除了地面及井下设备等因素对计算结果的影响,形成了油井动液面的计算采集新方法。现场9口井的应用表明,电功图计算动液面算法平均相对误差5.82%,考虑套压修正后计算精度提高了3.4%,实现了油井动液面实时跟踪分析,为油藏压力连续监测提供了一种简单可行的方法。
The dynamic fluid level data of oil wells reflect the liquid supply and energy status of formations.The conventional manual regular testing method has problems such as untimely recording, poor continuity and poor real-time performance. By determining the quantitative indicators of electric power diagrams, a mathematical fluid level calculation model based on incremental upstroke electric power is established and solved, the influence of surface and underground equipment on the calculation results is eliminated, and a new method for calculating and collecting fluid level of oil wells has been developed. The field application of 9 wells shows that the average error of the algorithm is 5.82%, and the calculation accuracy is increased by 3.4%after considering casing pressure correction. The real-time tracking analysis of oil well's fluid surface is realized, which provides a simple and feasible method for the continuous monitoring of reservoir pressure.
The dynamic fluid level data of oil wells reflect the liquid supply and energy status of formations.The conventional manual regular testing method has problems such as untimely recording, poor continuity and poor real-time performance. By determining the quantitative indicators of electric power diagrams, a mathematical fluid level calculation model based on incremental upstroke electric power is established and solved, the influence of surface and underground equipment on the calculation results is eliminated, and a new method for calculating and collecting fluid level of oil wells has been developed. The field application of 9 wells shows that the average error of the algorithm is 5.82%, and the calculation accuracy is increased by 3.4%after considering casing pressure correction. The real-time tracking analysis of oil well's fluid surface is realized, which provides a simple and feasible method for the continuous monitoring of reservoir pressure.
引文
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[2]于小明,何贯中,金英兰.抽油机井间抽制度合理性研究[J].大庆石油地质与开发,2006,25(4):78–79.
[3]何建中.抽油机在线监测及自动控制技术研究与应用[J].石油机械,2012,40(2):51–53.
[4]张自学,周荣学,张士英,等.机采井供排协调控制技术在华北油田的应用[J].石油钻采工艺,2008,30(5):1 222–1 245.
[5]苏春娥,董文魁,白红艳,等.陇东油田油井液面测试技术的改进与应用[J].石油矿场机械,2011,40(11):80–84.
[6]雷雨田,佘梅卿,屈玉成,等.高油气比油藏有杆泵举升技术的研究与应用[J].石油地质与工程,2006,20(4):70–72.
[7]刘军锋,郭海敏,戴家才.水平井油水两相产液剖面解释方法探讨[J].石油地质与工程,2006,20(5):46–48.
[8]谢朝阳,周好斌.基于动液面控制的抽油机变频控制系统[J].石油机械,2009,37(9):122–124.
[9]杨丽萍.用示功图计算抽油机井动液面深度[J].石油地质与工程,2010,24(5):101–103.
[10]张胜利,罗毅,吴赞美,等.抽油机井示功图计算动液面的修正算法[J].石油钻采工艺,2011,33(6):122–124.
[11]陈德春,张瑞超,孟红霞,等.基于功图的油井动液面计算模型及应用[J].科学技术与工程,2015,15(32):32–35.
[12]杨胡坤,张岩,王守龙,等.利用电机工作参数预测油井动液面深度的研究[J].北京石油化工学院学报,2016,24(4):48–53.
[13]宋志刚,张汉元.基于电功图的量油技术研究[J].内蒙古石油化工,2015,25(16):120–121.
[14]关丛荣,任淑艳.抽油机专用电流表的研制[J].黑龙江工程学院学报(自然科学版),2003,17(4):44–46.