新疆石油地质

新疆石油地质 ›› 2006, Vol. 27 ›› Issue (1): 107-108.

• 应用技术 • 上一篇    下一篇

水平井井筒周围局部脱气时产能计算方法

李春兰1, 程林松1, 朱国金2, 冯国智2   

  1. 1.中国石油大学石油天然气工程学院,北京102249;
    2.中国海洋石油研究中心,河北燕郊065200
  • 收稿日期:2005-05-23 修回日期:2005-05-23 发布日期:2020-10-19
  • 作者简介:李春兰（ 1965- ）,女,山东郓城人,高级实验师,油气田开发,（Tel）010- 89734592（E- mail）lichunlan1022@163.com.

Productivity Calculation for Near -Wellbor e Scale of Hor izontal Well with Par tial Degasification

LI Chun-lan1, CHENG Lin-song1, ZHU Guo-jin2, FENG Guo-zhi2   

  1. 1. Institute of Oil-Gas Engineering, China University of Petroleum, Beijing 102249, China;
    2. Study Center, CNOOC, Yanjiao, Hebei 065200, China
  • Received:2005-05-23 Revised:2005-05-23 Published:2020-10-19

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摘要： 地层压力一般高于饱和压力,而井底流压常常低于饱和压力,井筒周围出现局部脱气。这种局部脱气现象往往被人们忽视,这种条件下水平井产能的工程计算一般采用单相渗流公式,使计算结果产生较大误差。将渗流模型进行适当简化,并将两相渗流区进行微元处理,建立了局部脱气水平井产能计算方法。该方法使局部脱气时水平井产能计算结果更加合理。另外,该方法还可用来计算水平井极限产能和极限生产压差。

关键词: 水平井, 脱气, 产能, 公式

Abstract: The reservoir pressure is generally higher than the bubble point pressure, but the flowing bottom-hole pressure is often lower than it. The near-wellbore tends to appearing partial oil degasification. This phenomenon is usually neglected. However, the single-phase flowing formula used for calculation of horizontal well productivity in this case may cause a bigger error. This paper simplifies the flowing model and conducts an infinitesimal processing of the two-phase flowing zone, thus establishing a more reasonable method for calculating horizontal well productivity with partial oil degasification. This method can also be used to calculate the limit oil productivity and the limit producing pressure differential of horizontal well.

Key words: horizontal well, degasification, productivity, formula, equation

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