泵示功图单井自动量油技术研究

以井下泵示功图为基础,结合油井工况自动诊断技术,通过封闭曲线的曲率确定有杆抽油系统深井泵的游动阀、固定阀的开启点和关闭点,从而提出了有杆抽油系统单井自动量油的理论及其数学模型.经油田现场实测资料验证,以该理论为核心的泵示功图单井自动量油技术计算的产油量与实际产油量的平均相对误差为8.93%,最大相对误差为20.26%,最小相对误差为0.07%,相对误差在15%以内的井占85.71%.因此,利用该方法中封闭曲线的曲率来确定泵示功图的4个凡尔开闭点的方案是可行的,用于有杆抽油系统的单井自动量油具有实际的工程应用价值,该技术已应用于游梁式有杆抽油泵采油井自动监测系统中.

Automatic measurement technology of the single-well oil-gas yield based on the pump dynamometer card of a suck-rod pumping well

On the basis of the dynamometer card of the pump in suck-rod pumping system and the auto-diagnosis technology of oil well's working conditions,the opening points and the closing points of the traveling valve and the standing valve of the pump are determined by the curvature of the closed curve of the dynamometer card.Based on these,and the theoretical method of the automatic measurement technology and its mathematical model are put forward.The mean error between the oil-gas yields calculated by the mathematical model and the practically measuring yields is 8.93%,the maximum error is 20.26%,the minimum error is 0.07%,and the wells whose relative error is less than 15% account for 85.71%.This shows that the automatic measurement technology is reliable,and therefore it has good application prospects.The technology has been applied to the automatically monitoring system of beam-pumping wells.