薄油层射孔水平井井筒内流动与油藏渗流耦合模型（）　　摘要：　　关键词：　　中图分类号：TE34

Model of coupling flow in wellbore and layers for perforated horizontal wells in thin-layered reservoir

罗艳艳 程林松 丁祖鹏 邹晓霞

LUO Yanyan CHENG Linsong DING Zupeng ZOU Xiaoxia

中国石油大学石油工程教育部重点实验室，北京　102249 中海油研究总院，北京　100027 胜利油田滨南采油厂，山东滨州　256600

MOE Key Laboratory of Petroleum Engineering in China University of Petroleum, Beijing 102249, China CNOOC Research Institute, Beijing 100027, China Binnan Production plant, Shengli Oilfield Co., Binzhou 256600, China

为真实反映薄油层内水平井及近井地带流体流动情况，针对水平井近井渗流问题，以水平生产段为研究对象，根据压力与流量在边界处的连续性，同时考虑井筒内的加速度附加压力降，建立了薄油层射孔水平井井筒内流动与油藏渗流耦合数学模型。利用该模型进行实例分析，结果表明：近井地带压力分布呈波浪线形；沿井筒方向，近井地带压力随着井长增加而降低；井筒内流体流速呈阶梯增加趋势。建立的模型直观地考虑了射孔位置与数量，为水平井完井设计提供了理论基础。

In order to accurately reflect the situation of fluid flow in horizontal wells and nearby formations in thin oil-layers, taking the produced section of horizontal well as the research subject, this paper considered the additional pressure drop caused by acceleration in borehole and established a mathematical model of coupling flow in wellbore and oil layers for perforated horizontal wells in thin-layered reservoir based on continuity of pressure and flow on the boundary. Appling this model into practice, the results show that pressure distribution near the wellbore present wave shape and the pressure along wellbore decrease with the increase of well length; moreover, velocities of fluid in the wellbore increase stepwise. The coupling model built in this paper illustrates directly the position and numbers of perforation which provides a theoretical basis for completion design of the horizontal well in oilfields.