Research and application of lifting process for thin oil sand control in Chunguang oilfield

The thin oil block in Chunguang oilfield is a high porosity,high permeability and high wax bearing reservoir,which is easy to produce sand.The lifting process for thin oil is mainly of the conventional process string of tubing + conventional oil pump + oil drain + screen + plug.In the process of lifting,there are some problems such as pump valve wear and leakage caused by sand production,pipe rod string sticking,wellbore sand plugging and so on.In order to solve these problems,the lifting process for thin oil sand control is studied.By using the mathematical model,combined with the long plug sand control pump,the process parameters of sand control lifting are optimized,and the critical times of sand carrying and lifting are calculated accurately.Field tests indicate that the lifting process achieves the expected design purpose and prolongs the pump inspection period of sand production wells for thin oil.