WELLBORE PRESSURE GRADIENT CORRECTION METHOD IN NUMERICAL RESERVOIR SIMULATION
油藏数值模拟中井简压力梯度的校正方法

Finite Element Method for reservoir simulation has its unique advantages. Due to the particular flow behavior near wellbore, the calculation accuracy of the flowrate is affected in the simulation. In this study, the calculation errors of wellbore pressure gradient are analyzed, and a correction formula is proposed. It is shown that the pressure gradient correction formula can significantly increase the accuracy of the flowrate, and can effectively reduce the grid number near wellbore, thereby enhance the computational efficiency.