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

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.