Optimization of Oil Production Parameters of Rod Pump for Low-Productivity Wells in Ultra-Low Permeability and Tight Oil Reservoirs

It is difficult to optimize the working system of the rod pump due to low production and high energy costs of low-productivity wells in ultra-low permeability and tight oil reservoirs.By using bottom-hole pressure data of those oil producers,the model for the optimization of oil production parameters is built on the basis of the flow integral equation.By adopting the model,some parameters such as stroke length,stroke frequency,production time and shut-in time can be optimized without compromising steady peak production of those oil producers.Optimization of these parameters can effectively save energy and reduce costs.Experiments in 163 oil wells in the Qilicun Oilfield showed that energy consumption can be reduced up to 25.9% through the application of the technique to optimize the production time.Research results show that optimal model for oil production parameter based flow integral equations can effectively eliminate errors from previously applied techniques.This technique can effectively reduce energy consumption of the rod pump system to enhance overall performances of the oilfield.