摘要
应用Green函数和Newman积原理,推导出垂直压裂水平井在非稳态条件下生产时的压降公式,建立压裂水平井井筒与油藏耦合的新模型,并给出求解方法。实例计算结果表明:水平井的产量随时间是不断减小的,经过一定时间,流动达到拟稳态;井筒内存在一定的压力降;摩阻对压裂水平井生产动态有一定影响;水平井长度对产量有一定的影响,而且水平井长度存在最优范围;各条裂缝产量不相等,裂缝条数存在最优范围。
According to Green function and Newman＇s product principle, the pressure drop function of the vertical fractured horizontal well in unsteady state was concluded, and a new reservoir model coupled with wellbore was developed. In order to solve this problem, a new method was given. The computational results for a practical example show that the productivity de- creases as the time increasing, and the flow reaches pseudo-steady state after a long time. There exists the pressure drop a- long the wellbore. The friction has certain effect on production performance of fractured horizontal well. The length of hori- zontal wellbore also has effect on output and has an optimum range. The flow rate of each fracture is not equal, and the num- ber of fractures has an optimum range.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第4期98-102,共5页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家'863'项目(2006AA06Z236)
中石油创新基金项目(07E1020)
关键词
水平井
非稳态
产能
压降
裂缝
horizontal well
unsteady state
productivity
pressure drop
fracture
