抽油机井示功图法计算动液面的修正算法

Corrected algorithm for calculating dynamic fluid level with indicator diagram for rob-pumped well

通过抽油机井示功图计算动液面是近年来油井闭环控制的研究方向。在研究功图法计算动液面模型的基础上,通过对10口井的环空压力梯度现场测试数据的统计回归,建立了实测动液面与环空压力梯度关联的修正计算模型,利用上述计算模型修正了根据示功图计算动液面的基础方法,获得了相对准确的计算结果。对于华北油田现场应用示功图计算动液面实现油井智能供排协调是一种有益的尝试。

Calculating dynamic fluid level with indicator diagram of rob-pumped well has become a hot topic in recent years for studying closed-loop control of production wells.Based on further analyzing the model of dynamic fluid level computation,this paper establish a corrected algorithm method connecting the actual measured fluid level with annular pressure gradient by statistical regressing site-tested data of annulus pressure gradient in 10 wells.Using this calculating model,the basic method of using indicator diagram to calculate dynamic fluid level is corrected,with which the relatively much more precise results are reached.The success is a useful trial method to carry out intellectual injection-production adjustment of oil wells by calculating dynamic fluid level with indicator diagram in Huabei Oilfield.