Research on the Submergence Depth Model of Oil Well Pumping

After a long period of continuous exploitation, most of oil fields in China have been in a low-permeability or ultra-low-permeability state. In order to grasp the liquid level state of oil wells in real time, the submergence depth model of oil well pumping is constructed by using the law of dynamic liquid level change during the pumping process and the working mode of oil pump. On this basis, according to the relative stability of the parameters, the stroke pumping oil model is transformed into a continuously pumping model with time as a variable. The submergence depth model of pumping oil can be divided into two types according to oil well state, namely the submergence depth model of pumping oil in full pumping state and the submergence depth model of pumping oil in non-full pumping state. The model is applicable to the pumping process of ultra-low permeability oil fields, as well as to the liquid pumping process of straight container. Combined with pumping speed and continuous pumping model, the submergence degree of oil well can be obtained in real time which provides an effective application method to implement reasonable exploitation of the oil field.