【摘要】 有限元法用于油藏数值模拟具有独特的优越性.由于井筒附近流动的特殊性,直接采用数值模拟得到的压力梯度计算油井产量会导致较大的误差.本文分析了数值模拟中井筒压力梯度产生误差的原因,在此基础上提出了计算井筒压力梯度的校正公式.计算结果表明,压力梯度校正公式可显著提高油井产量的计算精度,并能有效地减少井筒附近的网格剖分数量,从而提高了计算效率.更多还原

【Abstract】 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.更多还原