【摘要】 在以往对砾石充填井压降分析的基础上,给出了一种以普通径向流方程为基础计算井筒附近收敛流动和射孔-砾石充填段的压降,再根据完善井与非完善井压降之间的关系,求出表皮系数的方法。通过实例计算,体现了孔深、孔径、孔密等不同射孔参数和地层参数对表皮系数的影响,验证了此方法的正确性与可靠性,同时对准确认识地层、评价油层伤害、优化油气井的增产措施提供了有益的指导。更多还原

【Abstract】 Based on what had been done previously in the aspect of pressure losses across perforation and gravel pack, the paper presents a new formula to calculate the pressure losses across perforation and gravel pack,and calculates the skin factor through the introduced popular equation of radial flow. The calculations from the given examples show the influences to the skin factor of different perforating parameters like hole deep, diameter and hole density as well as formation parameters, which have verified the validity and reliability of this method, and provide a beneficial guide for successful understanding of the formation and correct evaluation of the formation damage as well as optimizing the reservoir stimulation.更多还原