西南石油大学学报(自然科学版) ›› 2001, Vol. 23 ›› Issue (6): 34-37.DOI: 10.3863/j.issn.1000-2634.2001.06.11

• 石油工程 • 上一篇    下一篇

存在供给边界油藏水平井产能分析

郭肖1 翟雨阳2
  

  1. (1.西南石油学院石油工程学院,四川 南充 637001; 2.中原油田分公司勘探开发科学研究院)
  • 收稿日期:2001-03-26 修回日期:1900-01-01 出版日期:2001-12-20 发布日期:2001-12-20

A STUDY OF HORIZONTAL WELL PRODUCTIVITY IN RESERVOIRS WITH TOP AND BOTTOM DRAINAGE BOUNDARIES

GUO Xiao1 ZHAI Yu-yang2.   

  1. (Southwest Petroleum Inst, Nanchong Sichuan 637001,China)
  • Received:2001-03-26 Revised:1900-01-01 Online:2001-12-20 Published:2001-12-20

摘要:

保角变换方法是一种求解稳定的平面流动问题的有效方法。应用保角变换方法,将水平井三维流动简化成水平面和垂直面的两个平面流动,推导出了油层底部和顶部存在供给边界油藏水平井流量公式;并分析了偏心距和储层非均质性对水平井产能的影响。结果表明,偏心距对水平井产能影响较小,当δ/h小于0.3时,偏心距对垂直平面流量变化影响不超过5%;而储层非均质性对水平井产能影响与水平方向和垂直方向液流阻力相对大小有关。当水平方向液流阻力大于垂直方向液流阻力时,水平井产能随kv/kh增大而减小;当水平方向液流阻力小于垂直方向液流阻力时,水平井产能随kv/kh增大而增大。

关键词: 水平井, 保角变换, 供给边界, 产能

Abstract:

Conformal transformation is an effective method used to solve problems of 2D steady-state flow. By applying conformal transformation, horizontal well 3D flow is simplified into vertical radial and horizontal radial flows. A formula of horizontal well productivity for reservoirs with top and bottom drainage boundaries is derived. In addition, the effect of eccentricity and formation anisotropies on horizontal well productivity is analyzed. The results show that eccentricity has minor influence on horizontal well productivity: when δ/h is less than 3%, Qv/Qv0is no more than 5%. The influence of anisotropies on horizontal well productivity is related to the relative level of horizontal and vertical flow resistance forces: when horizontal resistance force is greater than vertical one, the productivity decreases with increased kv/kh; when horizontal resistance force is smaller than vertical one, the productivity increases with decreased kv/kh.

Key words: horizontal well, conformal transformation, drainage boundaries, productivity

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